/* ==========================================================================
   PaperTest.lk — Complete Master Design System & UI Stylesheet
   Dedicated G.C.E. O/L Model Exam Testing Platform
   ========================================================================== */

/* CSS RESET & MODERN DESIGN SYSTEM */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Core Brand Tokens */
  --primary: #6366F1;
  --primary-hover: #4F46E5;
  --primary-dark: #3730A3;
  --primary-50: #EEF2FF;
  --primary-100: #E0E7FF;
  --primary-200: #C7D2FE;
  
  --secondary: #7C3AED;
  --accent-orange: #F97316;
  --accent-green: #10B981;
  --accent-rose: #F43F5E;
  --accent-blue: #0EA5E9;
  --accent-amber: #F59E0B;
  
  --bg-page: #F8FAFC;
  --bg-surface: #FFFFFF;
  --bg-surface-alt: #F1F5F9;
  --bg-dark-banner: #0F172A;
  
  --border-light: #E2E8F0;
  --border-card: #EEF2F6;
  --border-focus: #C7D2FE;
  
  --text-title: #0F172A;
  --text-body: #334155;
  --text-muted: #64748B;
  --text-subtle: #94A3B8;
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 9999px;
  
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 25px -5px rgba(99, 102, 241, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.03);
  --shadow-xl: 0 20px 30px -10px rgba(99, 102, 241, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  --font-main: "Plus Jakarta Sans", "Noto Sans Sinhala", sans-serif;
  --font-heading: "Outfit", "Plus Jakarta Sans", "Noto Sans Sinhala", sans-serif;
  --font-sinhala: "Noto Sans Sinhala", sans-serif;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-page);
  color: var(--text-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-title);
  font-weight: 700;
  letter-spacing: -0.02em;
}

a {
  text-decoration: none;
  color: inherit;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   PAGE VIEW ROUTING SYSTEM
   ========================================================================== */
.page-view {
  display: none;
  animation: fadeInView 0.25s ease forwards;
}

.page-view.active-page {
  display: block;
}

@keyframes fadeInView {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   GRADIENTS & UTILITY BUTTONS
   ========================================================================== */
.text-gradient {
  background: linear-gradient(135deg, #6366F1 0%, #8B5CF6 50%, #EC4899 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-btn {
  background: linear-gradient(135deg, #6366F1 0%, #4F46E5 100%);
  color: #FFFFFF;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
  transition: all 0.25s ease;
}

.gradient-btn:hover {
  background: linear-gradient(135deg, #4F46E5 0%, #4338CA 100%);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
  transform: translateY(-2px);
}

.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--primary-50);
  border: 1px solid var(--primary-200);
  color: var(--primary);
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.badge-pill-small {
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  display: inline-block;
  margin-bottom: 6px;
}

.btn-primary-hero {
  background: linear-gradient(135deg, #6366F1 0%, #4F46E5 100%);
  color: #FFFFFF;
  font-weight: 700;
  font-size: 15px;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 6px 18px rgba(99, 102, 241, 0.35);
  transition: all 0.25s ease;
}

.btn-primary-hero:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(99, 102, 241, 0.45);
}

.btn-secondary-hero {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  color: var(--text-title);
  font-weight: 600;
  font-size: 15px;
  padding: 14px 26px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--shadow-xs);
  transition: all 0.25s ease;
}

.btn-secondary-hero:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-50);
  transform: translateY(-2px);
}

/* ==========================================================================
   NAVIGATION BAR
   ========================================================================== */
nav.site-navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  height: 72px;
  transition: all 0.3s ease;
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 20px;
}

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  text-decoration: none;
  flex-shrink: 0;
}

.site-header-logo {
  height: 44px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
  display: block;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.brand-wrap:hover .site-header-logo {
  transform: scale(1.03);
}

.nav-search-box {
  position: relative;
  flex: 1;
  max-width: 280px;
  margin: 0 10px;
}

.nav-search-input {
  width: 100%;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-pill);
  padding: 8px 16px 8px 36px;
  font-size: 13px;
  color: var(--text-title);
  outline: none;
  transition: all 0.2s ease;
  font-family: inherit;
}

.nav-search-input:focus {
  background: #FFFFFF;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.nav-search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-subtle);
  font-size: 14px;
  pointer-events: none;
}

.search-results-dropdown {
  position: absolute;
  top: 110%;
  left: 0;
  right: 0;
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  max-height: 320px;
  overflow-y: auto;
  display: none;
  z-index: 1001;
}

.search-results-dropdown.show {
  display: block;
}

.search-result-item {
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-card);
  cursor: pointer;
  transition: background 0.15s ease;
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover {
  background: var(--primary-50);
}

.search-result-item .s-name {
  font-weight: 600;
  font-size: 13px;
  color: var(--text-title);
}

.search-result-item .s-type {
  font-size: 11px;
  color: var(--primary);
  background: var(--primary-50);
  padding: 2px 8px;
  border-radius: 10px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  background: transparent;
  color: var(--text-body);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
  background: var(--primary-50);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.btn-nav-action {
  font-size: 13px;
  font-weight: 700;
  padding: 9px 18px;
  border-radius: var(--radius-pill);
}

.hamburger-btn {
  display: none;
  background: transparent;
  font-size: 24px;
  color: var(--text-title);
  padding: 4px 8px;
}

.mobile-nav-drawer {
  display: none;
  flex-direction: column;
  background: #FFFFFF;
  border-bottom: 1px solid var(--border-light);
  padding: 16px 24px 20px;
  gap: 8px;
  box-shadow: var(--shadow-lg);
}

.mobile-nav-drawer.open {
  display: flex;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  padding: 50px 0 60px;
  position: relative;
  overflow: hidden;
  background: 
    radial-gradient(ellipse 70% 60% at 85% 45%, rgba(99, 102, 241, 0.08) 0%, rgba(255, 255, 255, 0) 70%),
    radial-gradient(ellipse 50% 50% at 15% 20%, rgba(238, 242, 255, 0.6) 0%, rgba(255, 255, 255, 0) 70%),
    #FFFFFF;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 36px;
  align-items: center;
  position: relative;
}

.hero-left .pill-badge {
  margin-bottom: 20px;
}

.hero-headline {
  font-size: clamp(34px, 4vw, 52px);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--text-title);
  letter-spacing: -0.03em;
}

.hero-left p.hero-subtitle {
  font-size: clamp(15px, 1.25vw, 17px);
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 32px;
  max-width: 520px;
}

.hero-btn-group {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-social-proof {
  display: flex;
  align-items: center;
  gap: 14px;
}

.avatar-group {
  display: flex;
  align-items: center;
}

.avatar-item {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 2.5px solid #FFFFFF;
  margin-left: -10px;
  background: #E2E8F0;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
}

.avatar-item:first-child {
  margin-left: 0;
}

.proof-content {
  display: flex;
  flex-direction: column;
}

.stars-rating {
  display: flex;
  gap: 2px;
  color: #F59E0B;
  font-size: 14px;
}

.proof-text {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 600;
  margin-top: 2px;
}

/* Right-Aligned Hero Visual Column */
.hero-right {
  position: relative;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  width: 100%;
}

.hero-img-fader-wrap {
  position: relative;
  width: 100%;
  max-width: 480px;
  display: flex;
  justify-content: flex-end;
}

.hero-img-wrapper {
  position: relative;
  width: 100%;
  max-width: 460px;
  border-radius: 28px;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(79, 70, 229, 0.18), 0 10px 20px -5px rgba(0, 0, 0, 0.04);
  background: #FFFFFF;
}

.hero-img-wrapper img.hero-banner-img {
  width: 100%;
  height: 440px;
  object-fit: cover;
  object-position: center 20%;
  display: block;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-img-wrapper:hover img.hero-banner-img {
  transform: scale(1.03);
}

/* White Fader Gradients (Inspired by Reference) */
.hero-white-fader-left {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 48%;
  background: linear-gradient(to right, rgba(255, 255, 255, 0.98) 0%, rgba(255, 255, 255, 0.7) 35%, rgba(255, 255, 255, 0) 100%);
  pointer-events: none;
  z-index: 2;
}

.hero-white-fader-bottom {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 35%;
  background: linear-gradient(to top, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.45) 45%, rgba(255, 255, 255, 0) 100%);
  pointer-events: none;
  z-index: 2;
}

.hero-white-fader-top {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 22%;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.75) 0%, rgba(255, 255, 255, 0) 100%);
  pointer-events: none;
  z-index: 2;
}

/* FLOATING HERO GLASS CARDS */
.floating-glass-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1.5px solid rgba(255, 255, 255, 0.95);
  border-radius: 18px;
  padding: 10px 15px;
  display: flex;
  align-items: center;
  gap: 11px;
  box-shadow: 0 16px 36px rgba(15, 23, 42, 0.09), 0 4px 12px rgba(99, 102, 241, 0.08);
  z-index: 5;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  min-width: 195px;
}

.floating-glass-card:hover {
  transform: translateY(-4px) scale(1.03);
  box-shadow: 0 20px 40px rgba(99, 102, 241, 0.2);
  background: rgba(255, 255, 255, 0.96);
}

.float-card-1 { top: 6%; left: -25px; }
.float-card-2 { top: 38%; right: -25px; }
.float-card-3 { top: 68%; left: -30px; }
.float-card-4 { bottom: 4%; right: -15px; }

.float-icon-box {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.float-icon-purple { background: #EEF2FF; color: #4F46E5; }
.float-icon-green  { background: #ECFDF5; color: #059669; }
.float-icon-orange { background: #FFF7ED; color: #EA580C; }
.float-icon-rose   { background: #FFF1F2; color: #E11D48; }

.float-info h5 {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.2;
}

.float-info p {
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 1px;
}

/* ==========================================================================
   POPULAR CATEGORIES (SUBJECT GRID)
   ========================================================================== */
.categories-section {
  padding: 40px 0 50px;
}

.section-top-bar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 28px;
}

.section-heading-group h2 {
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 800;
  color: var(--text-title);
  letter-spacing: -0.02em;
}

.section-heading-group p {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}

.view-all-link {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.view-all-link:hover {
  transform: translateX(4px);
  text-decoration: underline;
}

.category-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 18px;
}

.cat-card-item {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: 16px;
  overflow: hidden;
  padding: 0;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.04);
}

.cat-card-item:hover {
  transform: translateY(-5px);
  border-color: var(--primary-200);
  box-shadow: 0 16px 32px rgba(79, 70, 229, 0.12);
}

.cat-img-wrapper {
  position: relative;
  width: 100%;
  height: 115px;
  overflow: hidden;
  background: #E2E8F0;
}

.cat-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.cat-card-item:hover .cat-card-img {
  transform: scale(1.08);
}

.cat-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.35) 0%, rgba(15, 23, 42, 0) 60%);
  pointer-events: none;
}

.cat-badge-pill {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(15, 23, 42, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  color: #FFFFFF;
  font-size: 9.5px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 20px;
  letter-spacing: 0.3px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

.cat-card-body {
  padding: 12px 14px 14px;
  text-align: left;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.cat-card-body h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 4px;
  line-height: 1.3;
}

.cat-count {
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.4;
  margin-top: auto;
}

/* ==========================================================================
   FEATURED COURSES & PAPERS
   ========================================================================== */
.featured-courses-section {
  padding: 40px 0 60px;
  background: var(--bg-surface-alt);
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}

.course-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.course-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-200);
}

.course-thumb-wrapper {
  position: relative;
  width: 100%;
  height: 140px;
  background: #E2E8F0;
  overflow: hidden;
}

.course-thumb-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.course-card:hover .course-thumb-wrapper img {
  transform: scale(1.08);
}

.course-tag-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(8px);
  color: #FFFFFF;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 8px;
}

.course-card-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.course-card-body h3.course-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.35;
  margin-bottom: 8px;
  min-height: 40px;
}

.course-instructor {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.inst-avatar {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 700;
}

.inst-name {
  font-size: 12px;
  color: var(--text-muted);
}

.course-rating-row {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  margin-bottom: 14px;
}

.rating-star {
  color: #F59E0B;
  font-weight: 700;
}

.rating-val {
  font-weight: 700;
  color: var(--text-title);
}

.rating-count {
  color: var(--text-subtle);
}

.course-footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--border-card);
  margin-top: auto;
}

.price-box {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.price-free {
  font-size: 16px;
  font-weight: 800;
  color: var(--accent-green);
}

.price-strike {
  font-size: 12px;
  color: var(--text-subtle);
  text-decoration: line-through;
}

.btn-start-course {
  background: var(--primary-50);
  color: var(--primary);
  font-weight: 700;
  font-size: 12px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  transition: all 0.2s ease;
}

.course-card:hover .btn-start-course {
  background: var(--primary);
  color: #FFFFFF;
}

/* ==========================================================================
   STATISTICS BANNER
   ========================================================================== */
.stats-banner-section {
  padding: 30px 0;
}

.dark-stats-card {
  background: linear-gradient(135deg, #0F172A 0%, #1E1B4B 100%);
  border-radius: var(--radius-xl);
  padding: 32px 40px;
  box-shadow: 0 20px 40px -15px rgba(15, 23, 42, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: center;
}

.dark-stat-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.stat-glow-icon {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: rgba(99, 102, 241, 0.18);
  border: 1px solid rgba(99, 102, 241, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: #818CF8;
  flex-shrink: 0;
}

.stat-details h4 {
  font-size: clamp(20px, 2.5vw, 26px);
  font-weight: 800;
  color: #FFFFFF;
  line-height: 1.1;
}

.stat-details p {
  font-size: 12px;
  color: #94A3B8;
  margin-top: 2px;
  font-weight: 500;
}

/* ==========================================================================
   LEARN ON YOUR TERMS (DEVICE SHOWCASE)
   ========================================================================== */
.learn-terms-section {
  padding: 60px 0 70px;
}

.terms-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: center;
}

.terms-left h2 {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 800;
  color: var(--text-title);
  line-height: 1.15;
  margin: 14px 0 16px;
}

.terms-left p.terms-desc {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 24px;
}

.features-check-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
}

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.check-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--primary-50);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.check-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-body);
}

.terms-right {
  position: relative;
  display: flex;
  justify-content: center;
}

.devices-showcase-box {
  width: 100%;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.12);
  border: 1px solid var(--border-light);
  background: #FFFFFF;
}

.devices-showcase-box img {
  width: 100%;
  height: auto;
  display: block;
}

/* ==========================================================================
   HOW IT WORKS SECTION
   ========================================================================== */
.how-it-works-section {
  padding: 60px 0 80px;
  background: #FFFFFF;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.how-steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 40px;
}

.step-card-item {
  background: var(--bg-page);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 32px 24px;
  text-align: center;
  position: relative;
  transition: all 0.3s ease;
}

.step-card-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-200);
}

.step-number-tag {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 10px rgba(99, 102, 241, 0.3);
}

.step-icon-circle {
  width: 64px;
  height: 64px;
  border-radius: 20px;
  background: #FFFFFF;
  margin: 8px auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  box-shadow: var(--shadow-sm);
}

.step-card-item h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 8px;
}

.step-card-item p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   SUBJECT DETAIL & MODEL PAPERS GRID VIEW (#pg-subj)
   ========================================================================== */
.subject-page-container {
  padding: 40px 0 60px;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-body);
  margin-bottom: 24px;
  transition: all 0.2s ease;
}

.back-btn:hover {
  background: var(--primary-50);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateX(-3px);
}

.subject-banner-card {
  background: linear-gradient(135deg, #0F172A 0%, #1E1B4B 100%);
  border-radius: var(--radius-xl);
  padding: 36px 40px;
  display: flex;
  align-items: center;
  gap: 28px;
  color: #FFFFFF;
  margin-bottom: 36px;
  box-shadow: 0 20px 40px -15px rgba(15, 23, 42, 0.4);
}

.subject-banner-icon {
  font-size: 56px;
  width: 90px;
  height: 90px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
  flex-shrink: 0;
}

.subject-banner-info h2 {
  font-size: clamp(24px, 3vw, 32px);
  color: #FFFFFF;
  margin-bottom: 6px;
}

.subject-banner-info p {
  color: #94A3B8;
  font-size: 14px;
}

.years-section-block {
  margin-top: 32px;
}

.years-section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 16px;
}

.years-section-header h3 {
  font-size: 20px;
  color: var(--text-title);
}

.years-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 16px;
}

.year-card-btn {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 18px 16px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-xs);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.year-card-btn:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.paper-filter-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin: 18px 0 24px;
}

.paper-filter-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  background: #FFFFFF;
  border: 1.5px solid var(--border-light);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-xs);
}

.paper-filter-tab:hover {
  border-color: var(--primary-200);
  color: var(--primary);
  background: var(--primary-50);
}

.paper-filter-tab.active {
  background: linear-gradient(135deg, #6366F1 0%, #4F46E5 100%);
  color: #FFFFFF;
  border-color: #4F46E5;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.paper-filter-tab.active.tab-past {
  background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
  border-color: #D97706;
  box-shadow: 0 4px 12px rgba(217, 119, 6, 0.3);
}

.paper-filter-tab.active.tab-model {
  background: linear-gradient(135deg, #6366F1 0%, #4F46E5 100%);
  border-color: #4F46E5;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.paper-filter-tab .tab-badge-num {
  font-size: 11px;
  padding: 1px 7px;
  border-radius: var(--radius-pill);
  background: rgba(0, 0, 0, 0.08);
  font-weight: 800;
}

.paper-filter-tab.active .tab-badge-num {
  background: rgba(255, 255, 255, 0.25);
  color: #FFFFFF;
}

.badge-pill-past {
  background: #FEF3C7;
  color: #B45309;
  border: 1px solid #FDE68A;
}

.badge-pill-model {
  background: #EEF2FF;
  color: #4F46E5;
  border: 1px solid #C7D2FE;
}

.year-card-btn.past-paper {
  border-color: #FCD34D;
  background: linear-gradient(180deg, #FFFCF3 0%, #FFFFFF 100%);
  box-shadow: 0 2px 6px rgba(245, 158, 11, 0.08);
}

.year-card-btn.past-paper:hover {
  border-color: #F59E0B;
  box-shadow: 0 8px 20px rgba(245, 158, 11, 0.2);
  transform: translateY(-4px);
}

.year-card-btn.ai-paper {
  border-color: #C7D2FE;
  background: #FFFFFF;
}

.year-card-btn.ai-paper:hover {
  border-color: var(--primary);
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.18);
  transform: translateY(-4px);
}

.year-card-btn h4 {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-title);
  margin: 4px 0;
}

.q-count-txt {
  font-size: 11.5px;
  color: var(--text-muted);
  font-weight: 600;
}

/* ==========================================================================
   QUIZ EXAM ROOM VIEW (#pg-quiz)
   ========================================================================== */
.quiz-wrapper {
  padding-bottom: 80px;
}

.quiz-header-bar {
  position: sticky;
  top: 72px;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-light);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.quiz-header-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn-quiz-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #FFFFFF;
  border: 1.5px solid var(--border-light);
  color: var(--text-title);
  font-size: 13px;
  font-weight: 700;
  padding: 7px 15px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  box-shadow: var(--shadow-xs);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
}

.btn-quiz-back:hover {
  background: var(--primary-50);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateX(-2px);
  box-shadow: var(--shadow-sm);
}

.quiz-sub-info h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-title);
}

.quiz-sub-info p {
  font-size: 12px;
  color: var(--text-muted);
}

.quiz-timer-pill {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-title);
  box-shadow: var(--shadow-xs);
  display: flex;
  align-items: center;
  gap: 6px;
}

.quiz-timer-pill.timer-warn {
  border-color: #EF4444;
  color: #EF4444;
  background: #FEF2F2;
  animation: pulseWarn 1s infinite;
}

@keyframes pulseWarn {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.03); }
}

.btn-finish-quiz {
  background: linear-gradient(135deg, #6366F1, #4F46E5);
  color: #FFFFFF;
  font-weight: 700;
  font-size: 13px;
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  transition: all 0.2s ease;
}

.btn-finish-quiz:hover {
  background: linear-gradient(135deg, #4F46E5, #3730A3);
  transform: translateY(-1px);
}

.quiz-progress-bar-container {
  height: 4px;
  background: var(--border-light);
  width: 100%;
}

.quiz-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #6366F1, #8B5CF6);
  width: 0%;
  transition: width 0.3s ease;
}

.quiz-content-body {
  max-width: 780px;
  margin: 32px auto 0;
  padding: 0 20px;
}

.quiz-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.quiz-qcard {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
}

.question-text-content {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-title);
  line-height: 1.85;
  margin-bottom: 24px;
  font-family: var(--font-sinhala), var(--font-main);
}

/* Question Instruction Box */
.q-instruction-box {
  background: #FFFBEB;
  border: 1.5px solid #FDE68A;
  border-radius: var(--radius-md);
  padding: 12px 18px;
  margin-bottom: 18px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  box-shadow: 0 2px 6px rgba(245, 158, 11, 0.06);
}

.q-instruction-pill {
  background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
  color: #FFFFFF;
  font-size: 11px;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  flex-shrink: 0;
  letter-spacing: 0.3px;
}

.q-instruction-text {
  font-size: 14.5px;
  font-weight: 700;
  color: #92400E;
  line-height: 1.7;
  font-family: var(--font-sinhala), var(--font-main);
}

/* Question Context Header */
.q-context-header {
  background: #F0FDF4;
  border: 1.5px solid #BBF7D0;
  border-radius: var(--radius-md);
  padding: 12px 18px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.context-icon {
  font-size: 20px;
  flex-shrink: 0;
}

.context-title {
  font-size: 15px;
  font-weight: 700;
  color: #166534;
  line-height: 1.6;
  font-family: var(--font-sinhala), var(--font-main);
}

/* Question Verse / Poetic Quote Card */
.q-verse-card {
  background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%);
  border: 1.5px solid #E2E8F0;
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 18px 24px;
  margin: 16px 0 20px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.q-verse-inner {
  font-size: 16px;
  line-height: 2.1;
  font-weight: 600;
  color: #1E293B;
  text-align: center;
  font-family: var(--font-sinhala), var(--font-main);
  white-space: pre-line;
}

/* Question Statement Group (A, B, C, D) */
.q-statement-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 16px 0 20px;
}

.q-statement-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #F8FAFC;
  border: 1.5px solid #E2E8F0;
  border-radius: var(--radius-md);
  padding: 12px 18px;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.q-statement-item:hover {
  border-color: #C7D2FE;
  background: #F5F7FF;
  transform: translateX(2px);
}

.statement-letter-badge {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6366F1 0%, #4F46E5 100%);
  color: #FFFFFF;
  font-weight: 800;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(99, 102, 241, 0.25);
}

.statement-item-txt {
  font-size: 15px;
  color: #1E293B;
  font-weight: 600;
  line-height: 1.6;
  font-family: var(--font-sinhala), var(--font-main);
}

/* Question Statement Pair Row with Arrow (➔) */
.q-statement-pair-row {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #F8FAFC;
  border: 1.5px solid #E2E8F0;
  border-radius: var(--radius-md);
  padding: 12px 18px;
  transition: all 0.2s ease;
}

.statement-pair-body {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex: 1;
  gap: 14px;
}

.pair-col {
  font-weight: 600;
  color: #1E293B;
  font-size: 15px;
  flex: 1;
  font-family: var(--font-sinhala), var(--font-main);
}

.pair-arrow {
  color: var(--primary);
  font-size: 18px;
  font-weight: 800;
  flex-shrink: 0;
  padding: 0 8px;
}

/* Question Bullet Items */
.q-bullet-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 16px;
  background: #F8FAFC;
  border-radius: var(--radius-sm);
  margin-bottom: 6px;
  border: 1px solid #F1F5F9;
}

.bullet-dot {
  color: var(--primary);
  font-size: 20px;
  line-height: 1.2;
  flex-shrink: 0;
}

.bullet-txt {
  color: #334155;
  font-size: 15px;
  line-height: 1.7;
  font-weight: 600;
  font-family: var(--font-sinhala), var(--font-main);
}

/* Question Prompt Box */
.q-prompt-box {
  background: #EEF2FF;
  border: 1.5px solid #C7D2FE;
  border-radius: var(--radius-md);
  padding: 14px 18px;
  margin: 16px 0 20px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.08);
}

.q-prompt-icon {
  font-size: 20px;
  flex-shrink: 0;
  line-height: 1.3;
}

.q-prompt-content {
  font-size: 16px;
  font-weight: 700;
  color: #312E81;
  line-height: 1.8;
  font-family: var(--font-sinhala), var(--font-main);
}

.q-text-paragraph {
  margin-bottom: 14px;
  line-height: 1.85;
  font-size: 16px;
  color: var(--text-title);
  font-weight: 600;
  font-family: var(--font-sinhala), var(--font-main);
}

/* ===== MATHEMATICAL MATRIX STYLES ===== */
.math-matrix {
  display: inline-flex;
  align-items: center;
  margin: 0 4px;
  vertical-align: middle;
  font-family: var(--font-main), 'Cambria Math', 'Noto Sans Sinhala', monospace;
  font-weight: 700;
  color: #1E293B;
  background: rgba(99, 102, 241, 0.06);
  padding: 3px 6px;
  border-radius: 6px;
  border-left: 2.5px solid #4F46E5;
  border-right: 2.5px solid #4F46E5;
  box-shadow: 0 1px 4px rgba(79, 70, 229, 0.1);
  line-height: 1.3;
}

.math-matrix-round {
  border-left: 2.5px solid #0D9488;
  border-right: 2.5px solid #0D9488;
  border-radius: 12px;
  background: rgba(13, 148, 136, 0.06);
}

.matrix-grid {
  display: inline-grid;
  gap: 4px 10px;
  text-align: center;
  padding: 2px 4px;
}

.matrix-grid-2x2,
.matrix-grid-3x2,
.matrix-grid-1x2 {
  grid-template-columns: repeat(2, auto);
}

.matrix-grid-2x1 {
  grid-template-columns: 1fr;
}

.matrix-cell {
  padding: 2px 6px;
  min-width: 14px;
  text-align: center;
  font-size: 15px;
  font-weight: 700;
  color: #0F172A;
  font-family: inherit;
}

/* ===== QUESTION & REVIEW DIAGRAM STYLES ===== */
.quiz-diagram-box,
.question-diagram-wrapper,
.review-diagram-wrapper {
  margin: 18px 0 22px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
  border: 2px solid #E2E8F0;
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
  position: relative;
  transition: all 0.2s ease;
}

.question-diagram-wrapper:hover,
.review-diagram-wrapper:hover {
  border-color: #6366F1;
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.12);
}

.question-diagram-img,
.review-diagram-img {
  max-width: 100%;
  max-height: 380px;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-md);
  cursor: zoom-in;
  transition: transform 0.2s ease;
  background: #FFFFFF;
}

.question-diagram-img:hover,
.review-diagram-img:hover {
  transform: scale(1.02);
}

.diagram-zoom-hint {
  margin-top: 10px;
  font-size: 12px;
  font-weight: 600;
  color: #6366F1;
  background: #EEF2FF;
  padding: 4px 12px;
  border-radius: 9999px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ===== DIAGRAM LIGHTBOX MODAL ===== */
.diagram-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  z-index: 99999;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.diagram-modal-overlay.active {
  display: flex;
  opacity: 1;
}

.diagram-modal-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: modalPop 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalPop {
  0% { transform: scale(0.92); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

.diagram-modal-content img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-md);
}

.diagram-modal-close {
  position: absolute;
  top: -14px;
  right: -14px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #EF4444;
  color: #FFFFFF;
  border: 2px solid #FFFFFF;
  font-size: 22px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  transition: transform 0.2s ease;
}

.diagram-modal-close:hover {
  transform: scale(1.1);
  background: #DC2626;
}

.options-container-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.quiz-option-btn {
  background: #FFFFFF;
  border: 2px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
  font-size: 15px;
  color: var(--text-body);
  font-family: var(--font-sinhala), var(--font-main);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  width: 100%;
  line-height: 1.6;
}

.quiz-option-btn:hover:not(:disabled) {
  border-color: var(--primary);
  background: var(--primary-50);
  transform: translateX(3px);
}

.quiz-option-btn:disabled {
  cursor: default;
}

.quiz-option-btn.opt-correct {
  border-color: #10B981 !important;
  background: #ECFDF5 !important;
  color: #065F46 !important;
}

.quiz-option-btn.opt-wrong {
  border-color: #EF4444 !important;
  background: #FEF2F2 !important;
  color: #991B1B !important;
}

.option-letter-badge {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-surface-alt);
  color: var(--text-title);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 800;
  flex-shrink: 0;
}

.explanation-card-box {
  background: #F8FAFC;
  border: 1px solid var(--border-light);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-top: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-body);
  font-family: var(--font-sinhala), var(--font-main);
}

.expl-card-title {
  font-weight: 700;
  margin-bottom: 6px;
  font-size: 14.5px;
}

.quiz-nav-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.btn-nav-step {
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 700;
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  color: var(--text-title);
  transition: all 0.2s ease;
}

.btn-nav-step:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-50);
}

.btn-nav-step:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-next-action {
  background: linear-gradient(135deg, #6366F1, #4F46E5);
  color: #FFFFFF;
  border: none;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-next-action:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(99, 102, 241, 0.4);
}

.question-navigator-wrap {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 20px;
  box-shadow: var(--shadow-xs);
}

.navigator-grid-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(36px, 1fr));
  gap: 8px;
  margin-top: 14px;
}

.nav-dot-btn {
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-light);
  font-size: 12px;
  font-weight: 700;
  color: var(--text-body);
  transition: all 0.15s ease;
}

.nav-dot-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.nav-dot-btn.dot-current {
  border-color: var(--primary);
  background: var(--primary);
  color: #FFFFFF;
}

.nav-dot-btn.dot-correct {
  background: #ECFDF5;
  border-color: #10B981;
  color: #065F46;
}

.nav-dot-btn.dot-wrong {
  background: #FEF2F2;
  border-color: #EF4444;
  color: #991B1B;
}

/* ==========================================================================
   STRUCTURED SCENARIO & PROMPT FORMATTING
   ========================================================================== */
.q-context-header {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: linear-gradient(135deg, #F0FDF4 0%, #E8F5E9 100%);
  border: 1px solid #BBF7D0;
  border-left: 4px solid #16A34A;
  padding: 10px 14px;
  border-radius: 8px;
  font-weight: 600;
  color: #166534;
  font-size: 14.5px;
  margin-bottom: 12px;
  line-height: 1.6;
}

.context-icon {
  font-size: 16px;
  flex-shrink: 0;
}

.context-title {
  flex: 1;
  font-weight: 600;
}

.q-statement-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 12px 0;
}

.q-statement-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  padding: 8px 14px;
  border-radius: 8px;
}

.statement-letter-badge {
  background: var(--primary);
  color: #FFFFFF;
  font-weight: 800;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 6px;
  flex-shrink: 0;
}

.statement-item-txt {
  font-size: 14.5px;
  font-weight: 600;
  color: #1E293B;
}

.q-statement-pair-row {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  padding: 8px 14px;
  border-radius: 8px;
}

.statement-pair-body {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
}

.pair-col {
  flex: 1;
  font-size: 14px;
  font-weight: 600;
  color: #1E293B;
}

.pair-arrow {
  color: var(--primary);
  font-weight: 800;
  font-size: 14px;
}

.q-bullet-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  padding: 6px 12px;
  border-radius: 6px;
  color: #334155;
  font-size: 14px;
  font-weight: 500;
}

.bullet-dot {
  color: var(--primary);
  font-weight: 800;
  font-size: 16px;
  line-height: 1;
}

.bullet-txt {
  flex: 1;
  line-height: 1.5;
}

.q-prompt-box {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: #EFF6FF;
  border: 1px solid #BFDBFE;
  border-left: 4px solid #3B82F6;
  padding: 12px 14px;
  border-radius: 8px;
  margin-top: 14px;
  margin-bottom: 8px;
}

.q-prompt-icon {
  font-size: 16px;
  flex-shrink: 0;
  margin-top: 2px;
}

.q-prompt-content {
  font-size: 15px;
  font-weight: 700;
  color: #1E3A8A;
  line-height: 1.6;
}

.q-text-paragraph {
  font-size: 15px;
  line-height: 1.7;
  color: #1E293B;
  margin-bottom: 10px;
}

/* ==========================================================================
   QUESTION DIAGRAMS & IMAGE PREVIEW MODAL
   ========================================================================== */
.quiz-diagram-box {
  margin: 14px 0 18px;
}

.question-diagram-wrapper, .review-diagram-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  background: #F8FAFC;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 16px;
}

.question-diagram-img, .review-diagram-img {
  max-width: 100%;
  max-height: 360px;
  object-fit: contain;
  border-radius: 8px;
  cursor: zoom-in;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: var(--shadow-sm);
  background: #FFFFFF;
}

.question-diagram-img:hover, .review-diagram-img:hover {
  transform: scale(1.015);
  box-shadow: var(--shadow-md);
}

.diagram-zoom-hint {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
  cursor: pointer;
}

.image-modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  z-index: 10000;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.image-modal-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-modal-content img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 8px;
}

.image-modal-close {
  position: absolute;
  top: -14px;
  right: -14px;
  width: 36px;
  height: 36px;
  background: #FFFFFF;
  color: var(--text-title);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 800;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  border: 1px solid var(--border-light);
  cursor: pointer;
  transition: all 0.2s ease;
}

.image-modal-close:hover {
  background: #F1F5F9;
  transform: scale(1.1);
}

/* ==========================================================================
   RESULTS DASHBOARD (#pg-res)
   ========================================================================== */
.results-page-container {
  padding: 40px 0 60px;
  max-width: 800px;
  margin: 0 auto;
}

.scorecard-main-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  margin-bottom: 28px;
}

.scorecard-top-header {
  background: linear-gradient(135deg, #0F172A 0%, #1E1B4B 100%);
  padding: 36px;
  text-align: center;
  color: #FFFFFF;
}

.grade-badge-circle {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, #10B981 0%, #059669 100%);
  color: #FFFFFF;
  font-size: 38px;
  font-weight: 800;
  font-family: var(--font-heading);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  box-shadow: 0 8px 24px rgba(16, 185, 129, 0.35);
}

.percentage-text {
  font-size: 42px;
  font-weight: 800;
  font-family: var(--font-heading);
  line-height: 1;
  margin-bottom: 6px;
}

.score-subtitle {
  font-size: 14px;
  color: #94A3B8;
}

.scorecard-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: #FFFFFF;
  border-top: 1px solid var(--border-light);
}

.res-stat-col {
  padding: 20px;
  text-align: center;
  border-right: 1px solid var(--border-light);
}

.res-stat-col:last-child {
  border-right: none;
}

.res-stat-col .stat-val {
  font-size: 26px;
  font-weight: 800;
  font-family: var(--font-heading);
}

.res-stat-col .stat-lbl {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 600;
  margin-top: 4px;
}

.res-stat-col.col-correct .stat-val { color: #10B981; }
.res-stat-col.col-wrong .stat-val { color: #EF4444; }
.res-stat-col.col-skipped .stat-val { color: #64748B; }

.results-action-buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.review-item-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-xs);
}

.review-item-header {
  padding: 14px 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: #FFFFFF;
}

.review-item-header:hover {
  background: var(--bg-page);
}

.review-item-header .rev-q-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-title);
  flex: 1;
  font-family: var(--font-sinhala), var(--font-main);
}

.review-status-tag {
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  white-space: nowrap;
}

.review-status-tag.status-correct { background: #ECFDF5; color: #059669; }
.review-status-tag.status-wrong { background: #FEF2F2; color: #DC2626; }
.review-status-tag.status-skipped { background: #F1F5F9; color: #64748B; }

.review-item-body {
  padding: 0 18px 18px;
  display: none;
  border-top: 1px solid var(--border-card);
  background: var(--bg-page);
}

.review-item-body.show-body {
  display: block;
}

.review-option-row {
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  margin-top: 6px;
  font-family: var(--font-sinhala), var(--font-main);
}

.review-option-row.rev-opt-correct {
  background: #ECFDF5;
  color: #065F46;
  font-weight: 600;
  border-left: 3px solid #10B981;
}

.review-option-row.rev-opt-wrong {
  background: #FEF2F2;
  color: #991B1B;
  border-left: 3px solid #EF4444;
}

.review-option-row.rev-opt-normal {
  background: #FFFFFF;
  color: var(--text-muted);
}

/* ==========================================================================
   ABOUT & CONTACT PAGES
   ========================================================================== */
.static-page-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 40px;
  max-width: 1140px;
  width: 100%;
  margin: 36px auto 60px;
  box-shadow: var(--shadow-sm);
}

.static-page-card h2 {
  font-size: 28px;
  margin-bottom: 12px;
}

.static-page-card p {
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}

.legal-section-block {
  margin-bottom: 26px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-light);
}

.legal-section-block:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.legal-section-block h3 {
  font-size: 18px;
  color: var(--text-title);
  margin-bottom: 10px;
}

.legal-section-block p {
  font-size: 14.5px;
  color: var(--text-body);
  line-height: 1.75;
  margin-bottom: 12px;
}

/* Contact Page Responsive Layout */
.contact-grid-wrap {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
  align-items: start;
}

.contact-form-col {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-light);
  border-radius: 14px;
  padding: 24px;
  order: 1;
}

.contact-info-col {
  display: flex;
  flex-direction: column;
  gap: 18px;
  order: 2;
}

@media (max-width: 860px) {
  .contact-grid-wrap {
    grid-template-columns: 1fr !important;
    gap: 24px !important;
  }
  .contact-form-col {
    order: 1 !important;
  }
  .contact-info-col {
    order: 2 !important;
  }

  .hero-grid {
    grid-template-columns: 1fr !important;
    gap: 32px !important;
  }
  .hero-right {
    justify-content: center !important;
    margin-top: 12px;
  }
  .hero-img-fader-wrap {
    max-width: 100% !important;
    justify-content: center !important;
  }
  .hero-img-wrapper img.hero-banner-img {
    height: 340px !important;
  }
  .floating-glass-card {
    min-width: 160px !important;
    padding: 8px 12px !important;
  }
  .float-card-1 { top: 4% !important; left: 0px !important; }
  .float-card-2 { top: 40% !important; right: 0px !important; }
  .float-card-3 { top: 72% !important; left: 0px !important; }
  .float-card-4 { display: none !important; }
}

/* Google AdSense Responsive Ad Slot Container */
.adsense-slot-container {
  margin: 24px auto;
  text-align: center;
  max-width: 728px;
  width: 100%;
}

.adsense-label {
  font-size: 10.5px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
  margin-bottom: 6px;
}

.adsense-slot-box {
  background: var(--bg-surface-alt);
  border: 1px dashed var(--border-card);
  border-radius: var(--radius-md);
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 13px;
}

.form-group-item {
  margin-bottom: 16px;
}

.form-group-item label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-title);
  margin-bottom: 6px;
}

.form-group-item input, .form-group-item textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  background: var(--bg-surface-alt);
  transition: all 0.2s ease;
}

.form-group-item input:focus, .form-group-item textarea:focus {
  background: #FFFFFF;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

/* ==========================================================================
   CUSTOM DARK FOOTER (AS PER REFERENCE DESIGN)
   ========================================================================== */
.custom-dark-footer {
  background-color: #000000;
  color: #CCCCCC;
  font-family: var(--font-main), sans-serif;
  padding: 55px 0 25px;
  position: relative;
  border-top: 1px solid #1A1A1A;
}

.custom-footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.custom-footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 36px;
}

.cfooter-brand-col .cfooter-logo-badge {
  display: inline-flex;
  align-items: center;
  background: #FFFFFF;
  padding: 6px 14px;
  border-radius: 10px;
  margin-bottom: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  transition: transform 0.2s ease;
}

.cfooter-brand-col .cfooter-logo-badge:hover {
  transform: translateY(-2px);
}

.cfooter-logo-img {
  height: 34px;
  width: auto;
  max-width: 150px;
  object-fit: contain;
  display: block;
}

.cfooter-tagline {
  color: #888888;
  font-size: 13px;
  line-height: 1.5;
  margin-bottom: 18px;
}

.cfooter-section-block {
  margin-top: 18px;
}

.cfooter-brand-heading {
  color: #818CF8;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: 0.2px;
}

.cfooter-brand-heading.main-heading {
  margin-bottom: 18px;
}

.cfooter-about-txt {
  color: #94A3B8;
  font-size: 13px;
  line-height: 1.65;
}

.cfooter-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 13.5px;
  color: #CBD5E1;
}

.cfooter-icon {
  font-size: 14px;
  color: #818CF8;
}

.cfooter-link {
  color: #CBD5E1;
  text-decoration: none;
  transition: color 0.2s ease;
}

.cfooter-link:hover {
  color: #818CF8;
}

.cfooter-links-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cfooter-links-list li a {
  color: #CBD5E1;
  text-decoration: none;
  font-size: 13.5px;
  transition: all 0.2s ease;
  display: inline-block;
}

.cfooter-links-list li a:hover {
  color: #818CF8;
  transform: translateX(3px);
}

.cfooter-white-heading {
  color: #FFFFFF;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 18px;
}

.cfooter-subscribe-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 280px;
}

.cfooter-input-wrap {
  position: relative;
  width: 100%;
}

.cfooter-input-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: #64748B;
  font-size: 14px;
}

.cfooter-email-input {
  width: 100%;
  background: #1E293B;
  border: 1px solid #334155;
  border-radius: 8px;
  padding: 10px 14px 10px 36px;
  font-size: 13px;
  color: #FFFFFF;
  outline: none;
  font-family: inherit;
  transition: all 0.2s ease;
}

.cfooter-email-input::placeholder {
  color: #64748B;
}

.cfooter-email-input:focus {
  border-color: #6366F1;
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.3);
}

.cfooter-subscribe-btn {
  background: linear-gradient(135deg, #6366F1, #4F46E5);
  color: #FFFFFF;
  border: none;
  border-radius: 8px;
  padding: 10px 20px;
  font-size: 13.5px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  width: 100%;
  text-align: center;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.cfooter-subscribe-btn:hover {
  background: linear-gradient(135deg, #4F46E5, #3730A3);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
}

.cfooter-scroll-wrap {
  display: flex;
  justify-content: flex-end;
  margin-top: 26px;
}

.cfooter-scroll-top-btn {
  padding: 7px 14px;
  background: rgba(255, 255, 255, 0.08);
  color: #CBD5E1;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.2s ease;
}

.cfooter-scroll-top-btn:hover {
  background: var(--primary);
  color: #FFFFFF;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.cfooter-divider-line {
  height: 1px;
  background-color: #1E293B;
  margin: 10px 0 24px;
  width: 100%;
}

.cfooter-bottom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding: 10px 0 20px;
}

.cfooter-social-icons {
  display: flex;
  align-items: center;
  gap: 12px;
}

.cfooter-social-btn {
  width: 38px;
  height: 38px;
  background: #1E293B;
  color: #818CF8;
  border: 1px solid #334155;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.cfooter-social-btn:hover {
  background: #6366F1;
  color: #FFFFFF;
  border-color: #6366F1;
  transform: translateY(-3px) scale(1.08);
}

.cfooter-copyright {
  font-size: 13px;
  color: #94A3B8;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.cfooter-admin-link {
  color: #94A3B8;
  text-decoration: none;
  font-size: 12px;
  transition: color 0.2s ease;
}

.cfooter-admin-link:hover {
  color: #818CF8;
  text-decoration: underline;
}

/* ==========================================================================
   ADMIN DASHBOARD & CONTROL CONSOLE
   ========================================================================== */
.admin-page-container {
  padding: 40px 0 80px;
  min-height: 80vh;
}

.admin-login-card {
  max-width: 440px;
  margin: 40px auto;
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 36px;
  box-shadow: var(--shadow-lg);
}

.admin-login-header {
  text-align: center;
}

.admin-shield-icon {
  font-size: 44px;
  margin-bottom: 12px;
}

.admin-login-header h2 {
  font-size: 24px;
  color: var(--text-title);
  margin-bottom: 6px;
}

.admin-login-header p {
  font-size: 13.5px;
  color: var(--text-muted);
}

.admin-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(135deg, #0F172A 0%, #1E1B4B 100%);
  color: #FFFFFF;
  padding: 20px 28px;
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
  box-shadow: var(--shadow-md);
  flex-wrap: wrap;
  gap: 16px;
}

.admin-brand-info {
  display: flex;
  align-items: center;
  gap: 14px;
}

.admin-shield-icon-sm {
  font-size: 32px;
}

.admin-brand-info h3 {
  font-size: 18px;
  color: #FFFFFF;
  margin-bottom: 2px;
}

.admin-status-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: #94A3B8;
}

.live-pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10B981;
  animation: livePulse 1.5s infinite;
}

@keyframes livePulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.admin-top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.admin-tabs-row {
  display: flex;
  gap: 8px;
  border-bottom: 2px solid var(--border-light);
  margin-bottom: 24px;
  overflow-x: auto;
}

.admin-tab-btn {
  padding: 12px 22px;
  font-weight: 700;
  font-size: 14px;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.admin-tab-btn:hover {
  color: var(--primary);
  background: var(--bg-surface-alt);
}

.admin-tab-btn.active {
  color: var(--primary);
  background: #FFFFFF;
  border-bottom: 3px solid var(--primary);
}

.admin-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.astat-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 22px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow-xs);
}

.astat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.astat-purple { background: #EEF2FF; color: #4F46E5; }
.astat-green  { background: #ECFDF5; color: #059669; }
.astat-amber  { background: #FEF3C7; color: #D97706; }
.astat-blue   { background: #EFF6FF; color: #2563EB; }

.astat-details {
  display: flex;
  flex-direction: column;
}

.astat-val {
  font-size: 24px;
  font-weight: 800;
  font-family: var(--font-heading);
  color: var(--text-title);
  line-height: 1.1;
}

.astat-lbl {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 600;
  margin-top: 2px;
}

.admin-card-section {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 24px;
  box-shadow: var(--shadow-xs);
}

.admin-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  flex-wrap: wrap;
  gap: 12px;
}

.admin-card-header h4 {
  font-size: 17px;
  color: var(--text-title);
}

.admin-table-wrapper {
  overflow-x: auto;
}

.admin-custom-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13.5px;
}

.admin-custom-table th {
  background: var(--bg-surface-alt);
  padding: 12px 16px;
  font-weight: 700;
  color: var(--text-title);
  border-bottom: 1px solid var(--border-light);
  white-space: nowrap;
}

.admin-custom-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-card);
  vertical-align: middle;
}

.admin-filter-bar {
  display: flex;
  gap: 14px;
  align-items: flex-end;
  flex-wrap: wrap;
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  box-shadow: var(--shadow-xs);
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.filter-group label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-title);
}

.admin-select-input, .admin-text-input {
  padding: 10px 14px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  font-size: 13.5px;
  outline: none;
  background: var(--bg-surface-alt);
  font-family: inherit;
  transition: all 0.2s ease;
}

.admin-select-input:focus, .admin-text-input:focus {
  background: #FFFFFF;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.admin-modal-content {
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  padding: 28px;
  width: 100%;
  max-width: 760px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: var(--shadow-xl);
}

.admin-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-light);
}

.admin-modal-header h3 {
  font-size: 18px;
  color: var(--text-title);
}

.admin-modal-close {
  background: var(--bg-surface-alt);
  border: none;
  font-size: 16px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.admin-modal-close:hover {
  background: #EF4444;
  color: #fff;
}

.options-grid-2x2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 12px;
}

.admin-modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}

.system-tools-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 16px;
}

.tool-card {
  background: var(--bg-page);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  text-align: center;
}

.tool-icon {
  font-size: 36px;
  margin-bottom: 12px;
}

.tool-card h5 {
  font-size: 15px;
  color: var(--text-title);
  margin-bottom: 6px;
}

.tool-card p {
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   ASYNC LOADING OVERLAY & SKELETON
   ========================================================================== */
.loading-overlay {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(4px);
  z-index: 50;
  border-radius: var(--radius-xl);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
}

.loading-overlay.active {
  display: flex;
}

.loading-spinner {
  width: 44px;
  height: 44px;
  border: 4px solid var(--primary-100);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  font-weight: 600;
  font-size: 14px;
  color: var(--text-body);
}

/* ==========================================================================
   COMPREHENSIVE RESPONSIVE MEDIA QUERIES (DESKTOP, TABLET & SMARTPHONES)
   ========================================================================== */

/* Large Tablets & Medium Screens (< 992px) */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
    text-align: center;
  }

  .hero-left p.hero-subtitle {
    margin: 0 auto 28px;
  }

  .hero-btn-group {
    justify-content: center;
  }

  .hero-social-proof {
    justify-content: center;
  }

  .hero-right {
    margin-top: 10px;
  }

  .hero-img-wrapper {
    max-width: 380px;
    margin: 0 auto;
  }

  .floating-glass-card {
    min-width: 170px;
    padding: 8px 12px;
  }

  .float-card-1 { right: 0; }
  .float-card-2 { right: 0; }
  .float-card-3 { right: 0; }
  .float-card-4 { right: 0; }

  .dark-stats-card {
    grid-template-columns: repeat(2, 1fr);
    padding: 24px;
    gap: 18px;
  }

  .terms-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    text-align: center;
  }

  .features-check-list {
    align-items: flex-start;
    max-width: 520px;
    margin: 0 auto 28px;
    text-align: left;
  }

  .custom-footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .cfooter-bottom-bar {
    flex-direction: column;
    gap: 18px;
    text-align: center;
  }

  .cfooter-copyright {
    position: static;
    justify-content: center;
  }

  .admin-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Tablets & Small Laptops (< 768px) */
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  /* Navigation */
  nav.site-navbar {
    height: 64px;
  }

  .site-header-logo {
    height: 38px;
    max-width: 140px;
  }

  .nav-links, .nav-search-box {
    display: none;
  }

  .hamburger-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 1px solid var(--border-light);
    background: var(--bg-surface-alt);
    font-size: 20px;
  }

  .btn-nav-action {
    padding: 8px 14px;
    font-size: 12px;
  }

  .mobile-nav-drawer {
    border-top: 1px solid var(--border-light);
    padding: 18px 20px 24px;
  }

  .mobile-nav-drawer .nav-link {
    padding: 12px 14px;
    font-size: 15px;
    border-radius: var(--radius-md);
    background: var(--bg-surface-alt);
    text-align: left;
    width: 100%;
  }

  /* Hero Section */
  .hero-section {
    padding: 32px 0 40px;
  }

  .hero-headline {
    font-size: clamp(26px, 6vw, 36px);
    margin-bottom: 14px;
  }

  .hero-left p.hero-subtitle {
    font-size: 14px;
    margin-bottom: 22px;
  }

  /* Floating Hero Cards in neat 2-col stack on mobile */
  .hero-right {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }

  .floating-glass-card {
    position: static;
    width: 100%;
    max-width: 380px;
    min-width: unset;
    box-shadow: var(--shadow-xs);
    margin-top: 4px;
  }

  /* Categories & Subject Grid */
  .category-cards-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .cat-card-item {
    padding: 18px 10px;
  }

  .cat-icon-container {
    width: 48px;
    height: 48px;
    font-size: 22px;
    margin-bottom: 10px;
  }

  .cat-card-item h4 {
    font-size: 13.5px;
  }

  /* How It Works */
  .how-steps-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .step-card-item {
    padding: 26px 18px;
  }

  /* Subject Detail View */
  .subject-page-container {
    padding: 24px 0 40px;
  }

  .subject-banner-card {
    flex-direction: column;
    text-align: center;
    padding: 24px 16px;
    gap: 16px;
  }

  .subject-banner-icon {
    width: 70px;
    height: 70px;
    font-size: 42px;
  }

  .years-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .year-card-btn {
    padding: 14px 10px;
  }

  .year-card-btn h4 {
    font-size: 17px;
  }

  /* Quiz Exam Room */
  .quiz-header-bar {
    top: 64px;
    padding: 8px 12px;
    gap: 8px;
  }

  .quiz-header-left {
    gap: 8px;
  }

  .btn-quiz-back {
    font-size: 12px;
    padding: 6px 10px;
  }

  .quiz-sub-info h3 {
    font-size: 14px;
  }

  .quiz-timer-pill {
    font-size: 12.5px;
    padding: 5px 10px;
  }

  .btn-finish-quiz {
    font-size: 12px;
    padding: 6px 12px;
  }

  .quiz-content-body {
    padding: 0 12px;
    margin-top: 18px;
  }

  .quiz-qcard {
    padding: 20px 14px;
    border-radius: var(--radius-lg);
  }

  .question-text-content {
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 18px;
  }

  .quiz-option-btn {
    padding: 12px 14px;
    font-size: 14px;
    gap: 10px;
  }

  .option-letter-badge {
    width: 24px;
    height: 24px;
    font-size: 11px;
  }

  /* Results View */
  .results-page-container {
    padding: 24px 12px 40px;
  }

  .scorecard-top-header {
    padding: 24px 16px;
  }

  .grade-badge-circle {
    width: 68px;
    height: 68px;
    font-size: 32px;
  }

  .percentage-text {
    font-size: 34px;
  }

  .scorecard-stats-row {
    padding: 8px 0;
  }

  .res-stat-col {
    padding: 12px 6px;
  }

  .res-stat-col .stat-val {
    font-size: 20px;
  }

  .results-action-buttons {
    flex-direction: column;
    gap: 10px;
  }

  .results-action-buttons button {
    width: 100%;
    justify-content: center;
  }

  /* Admin Console */
  .admin-page-container {
    padding: 20px 0 50px;
  }

  .admin-top-bar {
    padding: 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
  }

  .admin-top-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .admin-top-actions button {
    flex: 1;
    text-align: center;
    justify-content: center;
  }

  .admin-filter-bar {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    padding: 14px;
  }

  .admin-modal-content {
    padding: 20px 16px;
    max-width: 95vw;
    max-height: 88vh;
  }

  .options-grid-2x2 {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .system-tools-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}

/* Extra Small Smartphones (< 480px) */
@media (max-width: 480px) {
  .hero-btn-group {
    flex-direction: column;
    width: 100%;
  }

  .btn-primary-hero, .btn-secondary-hero {
    width: 100%;
    justify-content: center;
  }

  .dark-stats-card {
    grid-template-columns: 1fr;
    padding: 20px 16px;
    gap: 16px;
  }

  .custom-footer-grid {
    grid-template-columns: 1fr;
    gap: 26px;
    text-align: center;
  }

  .cfooter-contact-item {
    justify-content: center;
  }

  .cfooter-subscribe-form {
    max-width: 100%;
  }

  .cfooter-scroll-wrap {
    justify-content: center;
  }

  .admin-stats-grid {
    grid-template-columns: 1fr;
  }

  .astat-card {
    padding: 16px;
  }

  .static-page-card {
    padding: 24px 16px;
    margin: 20px auto 40px;
  }

  .quiz-meta-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .btn-quiz-back span:last-child {
    display: none;
  }
}

/* ===== CHEMICAL NUCLIDE & ISOTOPE NOTATION TYPOGRAPHY ===== */
.nuclide {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-main), 'Inter', sans-serif;
  margin: 0 3px;
  vertical-align: middle;
  line-height: 1;
}

.nuclide-stack {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-end;
  font-size: 0.68em;
  line-height: 0.95;
  margin-right: 2px;
  text-align: right;
  user-select: all;
}

.nuclide-mass {
  font-weight: 700;
  color: var(--text-title);
  letter-spacing: -0.02em;
}

.nuclide-atomic {
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: -0.02em;
}

.nuclide-sym {
  font-weight: 700;
  font-size: 1.05em;
  color: var(--text-title);
  letter-spacing: -0.01em;
}

.nuclide-charge {
  font-size: 0.72em;
  font-weight: 700;
  color: #4F46E5;
  vertical-align: super;
  margin-left: 1px;
}

/* ===== OFFICIAL PAST PAPER VS MODEL PAPER BADGES ===== */
.badge-tag-official {
  background: #FEF3C7;
  color: #B45309;
  border: 1px solid #FDE68A;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-pill, 9999px);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.badge-tag-model {
  background: #EEF2FF;
  color: #4F46E5;
  border: 1px solid #C7D2FE;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-pill, 9999px);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* Mobile Responsive Optimization for Quiz View */
@media (max-width: 640px) {
  .quiz-sub-info h3 {
    font-size: 14px;
    max-width: 140px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .quiz-sub-info p {
    font-size: 11px;
  }

  .quiz-timer-pill {
    padding: 6px 10px;
    font-size: 12px;
  }

  .btn-finish-quiz {
    padding: 6px 12px;
    font-size: 12px;
  }

  .q-statement-item {
    padding: 8px 10px;
    font-size: 13px;
  }

  .statement-letter-badge {
    width: 22px;
    height: 22px;
    font-size: 11px;
  }

  .quiz-option-btn {
    padding: 12px 14px;
    font-size: 13.5px;
  }
}

/* ===== ADMIN SECTION VISIBILITY & FEATURED MANAGER STYLES ===== */
.admin-sections-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 18px;
  margin-top: 16px;
}

.admin-section-ctrl-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
}

.admin-section-ctrl-card:hover {
  border-color: var(--primary-300, #a5b4fc);
  box-shadow: var(--shadow-md);
}

.admin-section-ctrl-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.admin-section-ctrl-info h5 {
  font-size: 15px;
  color: var(--text-title);
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.admin-section-ctrl-info p {
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0;
}

/* Modern iOS Style Toggle Switch */
.admin-switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 26px;
  flex-shrink: 0;
}

.admin-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.admin-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #cbd5e1;
  transition: .3s;
  border-radius: 34px;
}

.admin-slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .3s;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.admin-switch input:checked + .admin-slider {
  background-color: #10B981;
}

.admin-switch input:checked + .admin-slider:before {
  transform: translateX(22px);
}

/* Featured Cards Admin Table / List */
.featured-admin-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

.featured-admin-item {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  transition: all 0.2s ease;
}

.featured-admin-item:hover {
  background: #FFFFFF;
  border-color: var(--border-card);
  box-shadow: var(--shadow-sm);
}

.featured-admin-left {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 1;
  min-width: 260px;
}

.featured-admin-thumb {
  width: 52px;
  height: 52px;
  border-radius: 10px;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid var(--border-light);
}

.featured-admin-details h4 {
  font-size: 14.5px;
  color: var(--text-title);
  margin-bottom: 4px;
}

.featured-admin-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.featured-admin-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-admin-edit {
  background: #EEF2FF;
  color: #4F46E5;
  border: 1px solid #C7D2FE;
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 12.5px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-admin-edit:hover {
  background: #4F46E5;
  color: #FFFFFF;
}

.btn-admin-del {
  background: #FEF2F2;
  color: #DC2626;
  border: 1px solid #FECACA;
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 12.5px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-admin-del:hover {
  background: #DC2626;
  color: #FFFFFF;
}

/* ===== COMPREHENSIVE ADMIN MODALS & FORM STYLES ===== */
.image-modal-overlay,
.admin-modal-overlay {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  background: rgba(15, 23, 42, 0.75) !important;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 999999 !important;
  display: none;
  overflow-x: hidden !important;
  overflow-y: auto !important;
  padding: 30px 16px !important;
  box-sizing: border-box !important;
  flex-direction: column !important;
  align-items: center !important;
  justify-content: flex-start !important;
}

.admin-modal-content {
  background: #FFFFFF !important;
  border: 1px solid var(--border-card) !important;
  border-radius: var(--radius-xl) !important;
  width: 100% !important;
  max-width: 780px !important;
  max-height: 85vh !important;
  display: flex !important;
  flex-direction: column !important;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.45) !important;
  animation: adminModalPop 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
  position: relative !important;
  margin: auto !important;
  overflow: hidden !important;
  flex-shrink: 0 !important;
}

@keyframes adminModalPop {
  0% { opacity: 0; transform: scale(0.94) translateY(12px); }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}

.admin-modal-header {
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  padding: 16px 22px !important;
  border-bottom: 1px solid var(--border-light) !important;
  background: var(--bg-surface-alt) !important;
  flex-shrink: 0 !important;
}

.admin-modal-header h3 {
  font-size: 18px !important;
  color: var(--text-title) !important;
  margin: 0 !important;
  font-weight: 700 !important;
}

.admin-modal-close {
  width: 34px !important;
  height: 34px !important;
  border-radius: 8px !important;
  background: #F1F5F9 !important;
  border: 1px solid #E2E8F0 !important;
  color: #64748B !important;
  font-size: 16px !important;
  font-weight: 700 !important;
  cursor: pointer !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  transition: all 0.2s ease !important;
}

.admin-modal-close:hover {
  background: #EF4444 !important;
  color: #FFFFFF !important;
  border-color: #EF4444 !important;
  transform: rotate(90deg) !important;
}

.admin-modal-body {
  padding: 20px 22px !important;
  overflow-y: auto !important;
  flex: 1 1 auto !important;
  min-height: 0 !important;
}

.admin-modal-footer {
  display: flex !important;
  align-items: center !important;
  justify-content: flex-end !important;
  gap: 12px !important;
  padding: 14px 22px !important;
  border-top: 1px solid var(--border-light) !important;
  background: var(--bg-surface-alt) !important;
  flex-shrink: 0 !important;
}

.options-grid-2x2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 14px;
}

@media (max-width: 640px) {
  .options-grid-2x2 {
    grid-template-columns: 1fr;
  }
  .admin-modal-content {
    max-height: 96vh !important;
  }
}

.admin-text-input,
.admin-select-input {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border-card);
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-title);
  background: #FFFFFF;
  transition: border-color 0.2s, box-shadow 0.2s;
  box-sizing: border-box;
}

.admin-text-input:focus,
.admin-select-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

textarea.admin-text-input {
  resize: vertical;
  min-height: 80px;
}