/* ==========================================================================
   ExamSetu Nepal - Master Stylesheet
   Modern, Clean EdTech UI with Accessible Contrast and Seamless States
   ========================================================================== */

:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-dark: #1e40af;
  --primary-light: #eff6ff;
  --primary-glow: rgba(37, 99, 235, 0.15);

  --accent: #f59e0b;
  --accent-hover: #d97706;
  --accent-light: #fef3c7;

  --success: #16a34a;
  --success-light: #dcfce7;
  --success-border: #86efac;

  --danger: #dc2626;
  --danger-light: #fee2e2;
  --danger-border: #fca5a5;

  --warning: #d97706;
  --warning-light: #fef3c7;
  --warning-border: #fde68a;

  --info: #0284c7;
  --info-light: #e0f2fe;

  --background: #f8fafc;
  --surface: #ffffff;
  --surface-alt: #f1f5f9;
  --surface-elevated: #ffffff;

  --text: #0f172a;
  --muted-text: #64748b;
  --subtle-text: #94a3b8;
  --border: #e2e8f0;
  --border-focus: #93c5fd;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-pill: 9999px;

  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-hover: 0 20px 25px -5px rgba(37, 99, 235, 0.1), 0 8px 10px -6px rgba(37, 99, 235, 0.05);

  /* Modern Design Tokens: Liquid Glass & Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.78);
  --glass-bg-subtle: rgba(255, 255, 255, 0.52);
  --glass-border: rgba(255, 255, 255, 0.7);
  --glass-border-dark: rgba(226, 232, 240, 0.85);
  --glass-blur: 16px;
  --glass-specular: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.2) 100%);

  /* Claymorphism & Tactile Depth */
  --clay-bg: #ffffff;
  --clay-shadow: 0 14px 28px -6px rgba(15, 23, 42, 0.08), 0 6px 12px -3px rgba(15, 23, 42, 0.04);
  --clay-inset: inset 0 2px 3px rgba(255, 255, 255, 0.9), inset 0 -2px 3px rgba(15, 23, 42, 0.05);
  --clay-btn-shadow: 0 10px 22px -4px rgba(37, 99, 235, 0.38), inset 0 2px 2px rgba(255, 255, 255, 0.5), inset 0 -2px 3px rgba(0, 0, 0, 0.25);
  --clay-btn-active: 0 4px 10px rgba(37, 99, 235, 0.3), inset 0 2px 4px rgba(0, 0, 0, 0.25);

  /* Neumorphism Subtle Highlights */
  --neu-raised: 6px 6px 14px rgba(15, 23, 42, 0.05), -6px -6px 14px rgba(255, 255, 255, 0.9);
  --neu-inset: inset 2px 2px 5px rgba(15, 23, 42, 0.05), inset -2px -2px 5px rgba(255, 255, 255, 0.85);

  /* Neo-Brutalism Micro-Accents */
  --brutal-border: 1.5px solid #0f172a;
  --brutal-shadow: 3px 3px 0px rgba(15, 23, 42, 0.85);

  /* Bento Grid */
  --bento-gap: 22px;
  --bento-radius: 20px;

  /* Retro Y2K Ambient Chromatic Glow */
  --ambient-glow: radial-gradient(circle at 50% 20%, rgba(37, 99, 235, 0.09) 0%, rgba(245, 158, 11, 0.05) 50%, transparent 75%);

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --header-height: 72px;
}

/* Dark Mode Theme */
[data-theme='dark'] {
  --background: #090d16;
  --surface: #111827;
  --surface-alt: #1f2937;
  --surface-elevated: #1e293b;
  --text: #f8fafc;
  --muted-text: #94a3b8;
  --subtle-text: #64748b;
  --border: #2d3748;
  --border-focus: #3b82f6;
  --primary-light: rgba(37, 99, 235, 0.18);
  --success-light: rgba(22, 163, 74, 0.18);
  --danger-light: rgba(220, 38, 38, 0.18);
  --accent-light: rgba(245, 158, 11, 0.18);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);

  /* Dark Liquid Glass & Depth */
  --glass-bg: rgba(17, 24, 39, 0.75);
  --glass-bg-subtle: rgba(30, 41, 59, 0.5);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-border-dark: rgba(51, 65, 85, 0.7);
  --clay-bg: #1e293b;
  --clay-shadow: 0 14px 28px -6px rgba(0, 0, 0, 0.65);
  --clay-inset: inset 0 1px 1px rgba(255, 255, 255, 0.15), inset 0 -2px 4px rgba(0, 0, 0, 0.4);
  --neu-raised: 6px 6px 16px rgba(0, 0, 0, 0.65), -6px -6px 16px rgba(30, 41, 59, 0.4);
  --neu-inset: inset 2px 2px 6px rgba(0, 0, 0, 0.6), inset -2px -2px 6px rgba(30, 41, 59, 0.25);
  --brutal-shadow: 3px 3px 0px rgba(59, 130, 246, 0.85);
  --ambient-glow: radial-gradient(circle at 50% 20%, rgba(37, 99, 235, 0.15) 0%, rgba(245, 158, 11, 0.08) 50%, transparent 75%);
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--background);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-color: var(--background);
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior-y: none;
  -webkit-font-smoothing: antialiased;
}

button, a, input, select {
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--primary-hover);
}

img, svg {
  display: block;
  max-width: 100%;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

/* Accessibility Focus Outline */
:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

/* Layout Containers (Full-Width Desktop Web App Layout) */
.container {
  width: 100%;
  max-width: 1600px;
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(20px, 3vw, 48px);
  padding-right: clamp(20px, 3vw, 48px);
}

.container-fluid {
  width: 100%;
  max-width: 100%;
  padding-left: clamp(18px, 2.5vw, 40px);
  padding-right: clamp(18px, 2.5vw, 40px);
}

.main-content {
  flex: 1 0 auto;
  width: 100%;
  padding-top: calc(var(--header-height) + 24px);
  padding-bottom: 60px;
}

/* Header & Sticky Navigation (Liquid Glass & Glassmorphism) */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  border-bottom: 1px solid var(--glass-border-dark);
  box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.04);
  z-index: 1000;
  transition: all var(--transition-normal);
}

[data-theme='dark'] .navbar {
  background: var(--glass-bg);
  border-bottom-color: var(--glass-border);
  box-shadow: 0 4px 25px rgba(0, 0, 0, 0.4);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

/* Claymorphic Brand Icon */
.brand-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, #1e40af 0%, #2563eb 60%, #3b82f6 100%);
  color: #fff;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: 0 8px 18px -2px rgba(37, 99, 235, 0.45), inset 0 2px 3px rgba(255, 255, 255, 0.5), inset 0 -2px 3px rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.3);
  transition: transform 0.2s ease;
}
.brand:hover .brand-icon {
  transform: rotate(-4deg) scale(1.05);
}

.brand-title {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.5px;
  line-height: 1.1;
}

.brand-name span {
  color: var(--primary);
}

.brand-nepali {
  font-size: 0.75rem;
  color: var(--muted-text);
  font-weight: 600;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--muted-text);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted-text);
  background: var(--surface-alt);
  font-size: 1.2rem;
  transition: all var(--transition-fast);
}
.theme-toggle-btn:hover {
  color: var(--text);
  background: var(--border);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--text);
}

/* Buttons (Claymorphic Tactile Depth & Physical Press) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: 14px;
  transition: all var(--transition-fast);
  text-decoration: none;
  min-height: 46px;
  line-height: 1;
  text-align: center;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  user-select: none;
}

.btn:active {
  transform: translateY(2px) scale(0.985);
}

.btn-primary {
  background: linear-gradient(180deg, #3b82f6 0%, #1d4ed8 100%);
  color: #ffffff !important;
  box-shadow: var(--clay-btn-shadow);
  border: 1px solid rgba(255, 255, 255, 0.28);
}
.btn-primary:hover {
  background: linear-gradient(180deg, #60a5fa 0%, #2563eb 100%);
  box-shadow: 0 14px 26px -4px rgba(37, 99, 235, 0.46), inset 0 2px 2px rgba(255, 255, 255, 0.55), inset 0 -2px 3px rgba(0, 0, 0, 0.25);
  transform: translateY(-2px);
}
.btn-primary:active {
  box-shadow: var(--clay-btn-active);
  transform: translateY(1px);
}

.btn-secondary {
  background: var(--glass-bg);
  color: var(--text);
  border: 1.5px solid var(--border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.03), var(--clay-inset);
}
.btn-secondary:hover {
  background: var(--surface);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.08);
}
.btn-secondary:active {
  transform: translateY(1px);
  box-shadow: var(--neu-inset);
}

.btn-accent {
  background: linear-gradient(180deg, #fbbf24 0%, #d97706 100%);
  color: #ffffff !important;
  box-shadow: 0 10px 22px -4px rgba(217, 119, 6, 0.38), inset 0 2px 2px rgba(255, 255, 255, 0.5), inset 0 -2px 3px rgba(0, 0, 0, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.3);
}
.btn-accent:hover {
  background: linear-gradient(180deg, #fcd34d 0%, #f59e0b 100%);
  box-shadow: 0 14px 26px -4px rgba(217, 119, 6, 0.45);
  transform: translateY(-2px);
}
.btn-accent:active {
  transform: translateY(1px);
}

.btn-danger {
  background: linear-gradient(180deg, #ef4444 0%, #dc2626 100%);
  color: #ffffff !important;
  box-shadow: 0 8px 18px -3px rgba(220, 38, 38, 0.35), inset 0 2px 2px rgba(255, 255, 255, 0.4);
}
.btn-danger:hover {
  background: linear-gradient(180deg, #f87171 0%, #b91c1c 100%);
  transform: translateY(-1px);
}

.btn-success {
  background: linear-gradient(180deg, #22c55e 0%, #16a34a 100%);
  color: #ffffff !important;
  box-shadow: 0 8px 18px -3px rgba(22, 163, 74, 0.35), inset 0 2px 2px rgba(255, 255, 255, 0.4);
}
.btn-success:hover {
  background: linear-gradient(180deg, #4ade80 0%, #15803d 100%);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-outline:hover {
  background-color: var(--primary-light);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.85rem;
  min-height: 34px;
  border-radius: 6px;
}

.btn-block {
  width: 100%;
}

/* Hero Section (Retro Y2K / Modern Ambient Chromatic Glow) */
.hero-section {
  position: relative;
  padding: 50px 0 70px;
  overflow: hidden;
  background: var(--ambient-glow);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--primary);
  border: 1.5px solid rgba(37, 99, 235, 0.25);
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 20px;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1), var(--clay-inset);
}

.hero-title {
  font-size: 3.1rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.hero-title span {
  background: linear-gradient(135deg, #1e40af 0%, #2563eb 50%, #f59e0b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle-np {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent-hover);
  margin-bottom: 12px;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--muted-text);
  line-height: 1.6;
  margin-bottom: 30px;
  max-width: 560px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-stats-row {
  display: flex;
  gap: 32px;
  padding-top: 24px;
  border-top: 1.5px solid var(--border);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1.1;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--muted-text);
  font-weight: 600;
}

/* Hero Visual Card (Liquid Glass + Claymorphism) */
.hero-visual {
  position: relative;
}

.mock-test-preview-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  border: 1.5px solid var(--glass-border);
  border-radius: var(--bento-radius);
  padding: 30px;
  box-shadow: var(--clay-shadow);
  position: relative;
  z-index: 2;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.mock-test-preview-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 36px -8px rgba(37, 99, 235, 0.16);
}

.preview-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1.5px solid var(--border);
}

.tag-badge {
  display: inline-block;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.3px;
  box-shadow: var(--clay-inset);
}

.tag-badge-primary {
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid rgba(37, 99, 235, 0.2);
}

.tag-badge-warning {
  background: var(--warning-light);
  color: var(--warning);
  border: 1px solid rgba(217, 119, 6, 0.2);
}

.timer-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--glass-bg-subtle);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--text);
  box-shadow: var(--neu-inset);
}

.sample-q-box {
  margin-bottom: 22px;
}

.sample-q-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 18px;
  line-height: 1.45;
}

.sample-options-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Claymorphic Tactile Question Options */
.sample-option-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: 14px;
  font-size: 0.92rem;
  font-weight: 500;
  background: var(--surface);
  transition: all var(--transition-fast);
  cursor: pointer;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02), var(--clay-inset);
}

.sample-option-item:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(37, 99, 235, 0.12);
}

.sample-option-item.active {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.2), inset 0 2px 3px rgba(37, 99, 235, 0.12);
  transform: scale(1.01);
}

.option-badge-key {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--surface-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  font-weight: 800;
  border: 1px solid var(--border);
  box-shadow: var(--neu-inset);
}

.sample-option-item.active .option-badge-key {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary-dark);
}

/* Sections */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px;
}

.section-tag {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--muted-text);
}

/* Bento Grid Layout System */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--bento-gap);
  margin-bottom: 40px;
}

.bento-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(170%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(170%);
  border: 1.5px solid var(--glass-border-dark);
  border-radius: var(--bento-radius);
  padding: 24px;
  box-shadow: var(--clay-shadow);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.bento-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 32px -6px rgba(15, 23, 42, 0.12);
  border-color: var(--primary);
}

.bento-col-12 { grid-column: span 12; }
.bento-col-8 { grid-column: span 8; }
.bento-col-6 { grid-column: span 6; }
.bento-col-4 { grid-column: span 4; }
.bento-col-3 { grid-column: span 3; }

@media (max-width: 900px) {
  .bento-col-8, .bento-col-6, .bento-col-4, .bento-col-3 {
    grid-column: span 12;
  }
}

/* Exam Category Cards (Bento Grid & Liquid Glass) */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--bento-gap);
  margin-bottom: 50px;
}

.category-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(170%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(170%);
  border: 1.5px solid var(--glass-border-dark);
  border-radius: var(--bento-radius);
  padding: 28px;
  box-shadow: var(--clay-shadow);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--glass-specular);
  pointer-events: none;
}

.category-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 22px 36px -8px rgba(37, 99, 235, 0.16), 0 8px 16px -4px rgba(15, 23, 42, 0.06);
  border-color: var(--primary);
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 18px;
}

.cat-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary-light) 0%, rgba(37, 99, 235, 0.08) 100%);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.7rem;
  box-shadow: var(--clay-inset), 0 4px 10px rgba(37, 99, 235, 0.12);
  border: 1.5px solid rgba(255, 255, 255, 0.7);
  transition: transform 0.2s ease;
}
.category-card:hover .cat-icon-wrap {
  transform: scale(1.08) rotate(-3deg);
}

.cat-badge {
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 800;
  background: var(--surface-alt);
  color: var(--muted-text);
  box-shadow: var(--neu-inset);
}

.category-card:hover .cat-badge {
  background: var(--primary-light);
  color: var(--primary);
}

.card-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.card-np-title {
  font-size: 0.85rem;
  color: var(--accent-hover);
  font-weight: 600;
  margin-bottom: 12px;
}

.card-desc {
  font-size: 0.92rem;
  color: var(--muted-text);
  line-height: 1.5;
  margin-bottom: 20px;
  flex-grow: 1;
}

.card-footer-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.meta-stats {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted-text);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Practice Test Interface Styles */
.test-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 28px;
  align-items: flex-start;
}

.test-main-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(170%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(170%);
  border: 1.5px solid var(--glass-border-dark);
  border-radius: var(--bento-radius);
  padding: 34px;
  box-shadow: var(--clay-shadow);
  position: relative;
  overflow: hidden;
}

.test-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1.5px solid var(--border);
}

.test-title-info {
  display: flex;
  flex-direction: column;
}

.test-set-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.3px;
}

.test-meta-badge {
  font-size: 0.85rem;
  color: var(--muted-text);
  font-weight: 600;
}

.timer-box {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 800;
  font-size: 1.15rem;
  border: 1.5px solid rgba(37, 99, 235, 0.25);
  box-shadow: var(--clay-inset), 0 4px 10px rgba(37, 99, 235, 0.1);
}

.timer-box.timer-warning {
  background: var(--danger-light);
  color: var(--danger);
  border-color: var(--danger-border);
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.2);
  animation: pulseWarning 1.2s infinite;
}

@keyframes pulseWarning {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.85; transform: scale(1.02); }
}

.progress-container {
  margin-bottom: 28px;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--muted-text);
  margin-bottom: 8px;
}

.progress-bar-track {
  width: 100%;
  height: 10px;
  background-color: var(--surface-alt);
  border-radius: var(--radius-pill);
  overflow: hidden;
  box-shadow: var(--neu-inset);
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary) 0%, #3b82f6 50%, #60a5fa 100%);
  border-radius: var(--radius-pill);
  transition: width var(--transition-normal);
  box-shadow: 0 0 12px rgba(37, 99, 235, 0.4);
}

/* Question Presentation */
.question-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.q-badge {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--primary);
  background: var(--primary-light);
  padding: 6px 14px;
  border-radius: 10px;
  border: 1px solid rgba(37, 99, 235, 0.2);
  box-shadow: var(--clay-inset);
}

.q-topic-tag {
  font-size: 0.85rem;
  color: var(--muted-text);
  font-weight: 600;
}

.question-text {
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--text);
  margin-bottom: 28px;
}

.options-container {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
}

/* Claymorphic Interactive Option Card */
.option-btn {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 20px;
  border: 1.5px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
  text-align: left;
  transition: all var(--transition-fast);
  cursor: pointer;
  position: relative;
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.02), var(--clay-inset);
  user-select: none;
}

.option-btn:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px -4px rgba(37, 99, 235, 0.15);
}

.option-btn:active {
  transform: translateY(1px) scale(0.995);
}

.option-btn.selected {
  border-color: var(--primary);
  background: var(--primary-light);
  box-shadow: 0 8px 22px -4px rgba(37, 99, 235, 0.28), inset 0 2px 3px rgba(37, 99, 235, 0.15);
  transform: scale(1.01);
}

.option-btn.practice-opt-correct {
  border-color: var(--success);
  background: var(--success-light);
  box-shadow: 0 8px 22px -4px rgba(22, 163, 74, 0.28), inset 0 2px 3px rgba(22, 163, 74, 0.15);
}

.option-btn.practice-opt-correct .opt-key {
  background: var(--success);
  color: #fff;
  border-color: var(--success);
}

.option-btn.practice-opt-wrong {
  border-color: var(--danger);
  background: var(--danger-light);
  box-shadow: 0 8px 22px -4px rgba(220, 38, 38, 0.28), inset 0 2px 3px rgba(220, 38, 38, 0.15);
}

.option-btn.practice-opt-wrong .opt-key {
  background: var(--danger);
  color: #fff;
  border-color: var(--danger);
}

.opt-key {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--surface-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--muted-text);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.option-btn.selected .opt-key {
  background: var(--primary);
  color: #fff;
}

.opt-text {
  font-size: 1.02rem;
  font-weight: 500;
  color: var(--text);
  padding-top: 3px;
  flex: 1;
}

.option-btn.selected .opt-text {
  font-weight: 700;
  color: var(--primary-dark);
}

/* Test Action Buttons Bar */
.test-actions-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.action-left-group, .action-right-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-flag {
  color: var(--accent-hover);
  border-color: var(--accent);
}
.btn-flag.flagged {
  background-color: var(--accent-light);
  color: var(--accent-hover);
  font-weight: 700;
}

/* Question Palette Sidebar */
.palette-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.palette-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin-bottom: 24px;
  max-height: 280px;
  overflow-y: auto;
  padding-right: 4px;
}

.q-pallet-btn {
  height: 38px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  background: var(--surface-alt);
  color: var(--muted-text);
  transition: all var(--transition-fast);
}

.q-pallet-btn:hover {
  border-color: var(--primary);
  transform: scale(1.05);
}

.q-pallet-btn.current {
  outline: 2px solid var(--primary);
  outline-offset: 1px;
}

.q-pallet-btn.answered {
  background: var(--success);
  color: #fff;
  border-color: var(--success);
}

.q-pallet-btn.flagged {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.palette-legend {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  font-size: 0.78rem;
  color: var(--muted-text);
  font-weight: 600;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 3px;
}

.dot-answered { background: var(--success); }
.dot-flagged { background: var(--accent); }
.dot-unattempted { background: var(--surface-alt); border: 1px solid var(--border); }
.dot-current { border: 2px solid var(--primary); }

/* Result Page Styling */
.result-hero-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px;
  text-align: center;
  box-shadow: var(--shadow-md);
  margin-bottom: 40px;
}

.score-circle-wrapper {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: conic-gradient(var(--primary) calc(var(--percent) * 1%), var(--surface-alt) 0);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  position: relative;
}

.score-circle-inner {
  width: 116px;
  height: 116px;
  border-radius: 50%;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.score-big-percent {
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text);
}

.score-grade {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--muted-text);
  text-transform: uppercase;
}

.result-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.status-passed {
  background: var(--success-light);
  color: var(--success);
  border: 1px solid var(--success-border);
}

.status-failed {
  background: var(--danger-light);
  color: var(--danger);
  border: 1px solid var(--danger-border);
}

.result-metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.metric-card {
  background: var(--surface-alt);
  padding: 16px;
  border-radius: var(--radius-md);
  text-align: center;
}

.metric-val {
  font-size: 1.6rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 4px;
}

.metric-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted-text);
}

/* Detailed Review Questions List */
.review-item-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast);
}

.review-item-card.correct-item {
  border-left: 6px solid var(--success);
}

.review-item-card.wrong-item {
  border-left: 6px solid var(--danger);
}

.review-item-card.skipped-item {
  border-left: 6px solid var(--subtle-text);
}

.review-opt-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 16px 0;
}

.review-opt-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  border: 1px solid var(--border);
}

.review-opt-row.is-correct-answer {
  background: var(--success-light);
  border-color: var(--success-border);
  color: #166534;
  font-weight: 700;
}

.review-opt-row.is-user-wrong {
  background: var(--danger-light);
  border-color: var(--danger-border);
  color: #991b1b;
  font-weight: 700;
}

.explanation-box {
  background: var(--surface-alt);
  border-left: 3px solid var(--primary);
  padding: 14px 18px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.92rem;
  color: var(--text);
  margin-top: 14px;
}

.explanation-box strong {
  color: var(--primary);
}

/* Auth Forms (Desktop Responsive) */
.auth-wrapper {
  max-width: 560px;
  width: 100%;
  margin: 40px auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 36px;
  box-shadow: var(--shadow-lg);
}

.auth-header {
  text-align: center;
  margin-bottom: 28px;
}

.auth-title {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  transition: border-color var(--transition-fast);
}

.form-input:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px var(--primary-light);
}

.demo-account-box {
  margin-top: 24px;
  padding: 16px;
  border-radius: var(--radius-md);
  background: var(--surface-alt);
  border: 1px dashed var(--border);
  font-size: 0.85rem;
}

.demo-btn-group {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

/* AdSense Placeholder Units */
.ad-container {
  margin: 32px 0;
  padding: 16px;
  background: var(--surface-alt);
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
  text-align: center;
  overflow: hidden;
}

.ad-label {
  font-size: 0.72rem;
  color: var(--subtle-text);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.ad-slot-responsive {
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(148, 163, 184, 0.08);
  border-radius: 6px;
  color: var(--muted-text);
  font-size: 0.85rem;
  font-weight: 600;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  padding: 14px 20px;
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.92rem;
  font-weight: 600;
  border-left: 4px solid var(--primary);
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
  pointer-events: auto;
  animation: slideInToast 0.3s ease;
  min-width: 280px;
}

.toast.toast-success { border-left-color: var(--success); }
.toast.toast-danger { border-left-color: var(--danger); }
.toast.toast-warning { border-left-color: var(--warning); }

@keyframes slideInToast {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Footer */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 60px 0 24px;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col-brand {
  max-width: 320px;
}

.footer-text {
  font-size: 0.92rem;
  color: var(--muted-text);
  line-height: 1.6;
  margin-top: 14px;
}

.footer-heading {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  font-size: 0.9rem;
  color: var(--muted-text);
  transition: color var(--transition-fast);
}
.footer-link:hover {
  color: var(--primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted-text);
  flex-wrap: wrap;
  gap: 12px;
}

.disclaimer-banner {
  background: var(--warning-light);
  border: 1px solid var(--warning-border);
  color: #92400e;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  margin-bottom: 24px;
  line-height: 1.4;
}

/* ==========================================================================
   Topic Mastery & Weakness Diagnostic Styles
   ========================================================================== */
.diagnostic-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-top: 24px;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.diagnostic-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--danger), var(--warning), var(--success));
}

.diagnostic-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.diagnostic-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.diagnostic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.topic-diag-item {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform var(--transition-fast);
}

.topic-diag-item:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
}

.topic-diag-item.is-weak {
  border-color: rgba(220, 38, 38, 0.35);
  background: linear-gradient(180deg, var(--surface-alt) 0%, rgba(220, 38, 38, 0.04) 100%);
}

.topic-diag-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.topic-diag-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 6px;
}

.topic-diag-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 12px;
  text-transform: uppercase;
}

.topic-diag-badge.badge-strong {
  background: var(--success-light);
  color: var(--success);
}

.topic-diag-badge.badge-moderate {
  background: var(--accent-light);
  color: var(--accent);
}

.topic-diag-badge.badge-weak {
  background: var(--danger-light);
  color: var(--danger);
}

.topic-progress-track {
  height: 8px;
  background: rgba(148, 163, 184, 0.2);
  border-radius: 4px;
  overflow: hidden;
}

.topic-progress-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.6s ease;
}

.topic-progress-fill.fill-strong { background: var(--success); }
.topic-progress-fill.fill-moderate { background: var(--accent); }
.topic-progress-fill.fill-weak { background: var(--danger); }

.topic-diag-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--muted-text);
}

/* In-Review AdSense Unit */
.in-review-ad-card {
  margin: 28px 0;
  background: var(--surface-alt);
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.in-review-ad-label {
  font-size: 0.7rem;
  color: var(--subtle-text);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

/* ==========================================================================
   Print & Official OMR Model Paper Styles (@media print)
   ========================================================================== */
.print-only {
  display: none;
}

@media print {
  body {
    background: #ffffff !important;
    color: #111827 !important;
    font-size: 11pt !important;
    line-height: 1.4 !important;
  }

  /* Hide web elements */
  .navbar,
  .footer,
  .nav-actions,
  .theme-toggle-btn,
  .ad-container,
  .in-review-ad-card,
  #reviewFilterBtns,
  .btn,
  .toast-container,
  .score-circle-wrapper,
  .result-status-badge,
  .diagnostic-card,
  .breadcrumbs {
    display: none !important;
  }

  .print-only {
    display: block !important;
  }

  .container {
    max-width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  .main-content {
    padding: 0 !important;
  }

  .print-header {
    text-align: center;
    border-bottom: 2px solid #111827;
    padding-bottom: 12px;
    margin-bottom: 18px;
  }

  .print-header h1 {
    font-size: 16pt;
    font-weight: 800;
    margin-bottom: 4px;
    text-transform: uppercase;
  }

  .print-header p {
    font-size: 9pt;
    color: #4b5563;
  }

  .print-candidate-bar {
    display: flex;
    justify-content: space-between;
    font-size: 9.5pt;
    margin-bottom: 14px;
    padding-bottom: 8px;
    border-bottom: 1px dashed #9ca3af;
  }

  .review-item-card {
    page-break-inside: avoid;
    break-inside: avoid;
    border: 1px solid #e5e7eb !important;
    background: #ffffff !important;
    color: #111827 !important;
    box-shadow: none !important;
    margin-bottom: 12px !important;
    padding: 12px !important;
  }

  .review-opt-list {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 6px !important;
  }

  .explanation-box {
    background: #f9fafb !important;
    border: 1px solid #e5e7eb !important;
    color: #1f2937 !important;
    font-size: 9pt !important;
    padding: 6px 10px !important;
    margin-top: 8px !important;
  }

  .page-break {
    page-break-before: always;
    break-before: page;
  }

  /* Official OMR Sheet Print Layout */
  .omr-print-section {
    page-break-before: always;
    break-before: page;
    padding-top: 10px;
  }

  .omr-header-box {
    border: 2px solid #111827;
    padding: 12px;
    text-align: center;
    margin-bottom: 16px;
  }

  .omr-grid-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
  }

  .omr-column {
    border: 1px solid #d1d5db;
    border-radius: 4px;
    padding: 6px;
  }

  .omr-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 3px 4px;
    border-bottom: 1px solid #f3f4f6;
    font-size: 8.5pt;
  }

  .omr-bubbles {
    display: flex;
    gap: 6px;
  }

  .omr-circle {
    width: 15px;
    height: 15px;
    border: 1.5px solid #374151;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 7pt;
    font-weight: 700;
  }
}