/* ==========================================================================
   PREPMASTER - CAMPUS PLACEMENT & INTERVIEW PORTAL
   Designed & Maintained by Sachin Kumar
   Modern Glassmorphism & High-Performance Design System
   ========================================================================== */

/* --- CSS Variables & Theming --- */
:root {
  /* Dark Theme (Default) */
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.85);
  --bg-card-hover: rgba(31, 41, 55, 0.95);
  --bg-glass: rgba(17, 24, 39, 0.75);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-glow: rgba(99, 102, 241, 0.35);

  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  /* Brand Accents */
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.4);
  --secondary: #06b6d4;
  --accent: #ec4899;

  /* Status Colors */
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.12);
  --success-border: rgba(16, 185, 129, 0.4);

  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.12);
  --danger-border: rgba(239, 68, 68, 0.4);

  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.12);

  --info: #3b82f6;

  /* Layout & Geometry */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.25);

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-card-hover: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --border-color: rgba(0, 0, 0, 0.08);
  --border-color-glow: rgba(99, 102, 241, 0.25);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.15);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(6, 182, 212, 0.08) 0px, transparent 50%),
    radial-gradient(at 50% 50%, rgba(236, 72, 153, 0.05) 0px, transparent 50%);
  background-attachment: fixed;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

code, pre {
  font-family: 'JetBrains Mono', monospace;
}

/* --- App Layout --- */
.app-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  overflow-x: hidden;
}

.main-content {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

/* --- Navigation Header --- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  user-select: none;
}

.logo-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: 0 4px 14px var(--primary-glow);
  transition: transform var(--transition-bounce);
}

.logo-area:hover .logo-icon {
  transform: scale(1.08) rotate(-4deg);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fff 30%, var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="light"] .brand-name {
  background: linear-gradient(135deg, #0f172a 40%, var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--secondary);
}

/* Active Quiz Header Elements */
.header-center-info {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.active-category-pill {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
}

.timer-badge {
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid var(--primary-glow);
  color: var(--primary);
  font-weight: 700;
  font-size: 0.95rem;
  font-family: 'JetBrains Mono', monospace;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  box-shadow: 0 0 12px var(--primary-glow);
  transition: all var(--transition-fast);
}

.timer-badge.warning {
  background: rgba(239, 68, 68, 0.2);
  border-color: var(--danger);
  color: var(--danger);
  animation: pulse-danger 1s infinite;
}

@keyframes pulse-danger {
  0%, 100% { transform: scale(1); box-shadow: 0 0 10px rgba(239,68,68,0.3); }
  50% { transform: scale(1.04); box-shadow: 0 0 20px rgba(239,68,68,0.6); }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Icon Buttons */
.icon-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 1rem;
}

.icon-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-color-glow);
  transform: translateY(-2px);
}

/* General Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--primary-glow);
  filter: brightness(1.1);
}

.btn-outline {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn-outline:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary);
  transform: translateY(-2px);
}

.btn-success {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #fff;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
}

.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.btn-sm {
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 0.85rem 1.6rem;
  font-size: 1.05rem;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* --- Views & Screens --- */
.screen-view {
  display: none;
  animation: fadeIn 0.3s ease forwards;
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- HERO SECTION --- */
.hero-section {
  text-align: center;
  padding: 2.5rem 1rem 1.5rem;
  max-width: 850px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid var(--primary-glow);
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #ffffff 40%, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="light"] .hero-title {
  background: linear-gradient(135deg, #0f172a 40%, var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.75rem;
}

.hero-subtitle strong {
  color: var(--text-primary);
}

.hero-stats-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.hero-stat-pill {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.hero-stat-pill i {
  color: var(--secondary);
}

/* Settings Bar */
.settings-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.75rem;
  margin-bottom: 2.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.setting-group {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}

.setting-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.pill-selector {
  display: flex;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 3px;
}

.pill-opt {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.pill-opt.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px var(--primary-glow);
}

/* --- Section Heading --- */
.section-heading {
  margin-bottom: 1.5rem;
}

.section-heading h2 {
  font-size: 1.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.25rem;
}

.section-heading p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* --- DOMAIN CATEGORY GRID --- */
.domain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
}

.domain-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.25rem;
  transition: all var(--transition-normal);
  cursor: pointer;
  overflow: hidden;
}

.domain-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-color-glow);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

.domain-card.featured-card {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(6, 182, 212, 0.08)), var(--bg-card);
  border: 1.5px solid var(--primary-glow);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.5rem;
}

.domain-card-badge {
  position: absolute;
  top: 14px;
  right: 16px;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  color: #fff;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
}

.domain-icon-box {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #fff;
  flex-shrink: 0;
}

.grad-mock { background: linear-gradient(135deg, #ec4899, #8b5cf6); }
.grad-apt { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.grad-reas { background: linear-gradient(135deg, #8b5cf6, #3b82f6); }
.grad-verb { background: linear-gradient(135deg, #10b981, #06b6d4); }
.grad-dsa { background: linear-gradient(135deg, #3b82f6, #6366f1); }
.grad-cs { background: linear-gradient(135deg, #6366f1, #a855f7); }
.grad-web { background: linear-gradient(135deg, #f97316, #eab308); }

.domain-card-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.domain-card-content p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 0.85rem;
  line-height: 1.5;
}

.domain-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.domain-meta span {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg-secondary);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
}

/* --- QUIZ ACTIVE SCREEN --- */
.quiz-container {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
}

.quiz-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}

.meta-left, .meta-right {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.question-tracker-pill {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.question-tracker-pill strong {
  color: var(--text-primary);
}

.company-tag {
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.35);
  color: var(--secondary);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.difficulty-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  background: rgba(245, 158, 11, 0.15);
  color: var(--warning);
}

.difficulty-tag.Easy { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.difficulty-tag.Medium { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.difficulty-tag.Hard { background: rgba(239, 68, 68, 0.15); color: var(--danger); }

/* Lifeline & Flag Buttons */
.lifeline-btn, .flag-btn, .palette-toggle-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all var(--transition-fast);
}

.lifeline-btn:hover {
  background: rgba(236, 72, 153, 0.15);
  border-color: var(--accent);
  color: var(--accent);
}

.lifeline-btn.used {
  opacity: 0.4;
  cursor: not-allowed;
  text-decoration: line-through;
}

.flag-btn:hover, .flag-btn.flagged {
  background: rgba(245, 158, 11, 0.15);
  border-color: var(--warning);
  color: var(--warning);
}

.palette-toggle-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary);
  color: var(--primary);
}

/* Progress Bar */
.progress-bar-wrap {
  width: 100%;
  height: 6px;
  background: var(--bg-card);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
}

/* Question Card */
.question-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  margin-bottom: 1.5rem;
  position: relative;
  transition: all var(--transition-normal);
}

.question-topic-badge {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
}

.question-title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
  white-space: pre-line;
}

/* Code Snippet Box */
.code-snippet-box {
  background: #080c14;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
  overflow: hidden;
}

.code-header {
  background: rgba(255, 255, 255, 0.04);
  padding: 0.4rem 0.85rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
}

.copy-code-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
}

.copy-code-btn:hover {
  color: #fff;
}

.code-snippet-box pre {
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.5;
  color: #38bdf8;
}

/* Option Cards */
.options-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.option-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-secondary);
  border: 1.5px solid var(--border-color);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  user-select: none;
  transition: all var(--transition-fast);
  text-align: left;
  width: 100%;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text-primary);
}

.option-item:hover:not(:disabled) {
  background: var(--bg-card-hover);
  border-color: var(--border-color-glow);
  transform: translateX(4px);
}

.opt-prefix {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-secondary);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.opt-text {
  flex: 1;
  font-size: 0.98rem;
  line-height: 1.45;
}

/* Option States */
.option-item.selected {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--primary);
  color: var(--text-primary);
}

.option-item.selected .opt-prefix {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.option-item.correct-ans {
  background: var(--success-bg) !important;
  border-color: var(--success) !important;
  color: var(--text-primary) !important;
}

.option-item.correct-ans .opt-prefix {
  background: var(--success) !important;
  color: #fff !important;
  border-color: var(--success) !important;
}

.option-item.wrong-ans {
  background: var(--danger-bg) !important;
  border-color: var(--danger) !important;
  color: var(--text-primary) !important;
}

.option-item.wrong-ans .opt-prefix {
  background: var(--danger) !important;
  color: #fff !important;
  border-color: var(--danger) !important;
}

.option-item.eliminated {
  opacity: 0.25;
  pointer-events: none;
  text-decoration: line-through;
}

/* Instant Feedback Explanation Box */
.instant-feedback-box {
  margin-top: 1.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  animation: fadeIn 0.2s ease;
}

.feedback-header {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.feedback-header .badge-correct { color: var(--success); }
.feedback-header .badge-wrong { color: var(--danger); }

.feedback-body {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  white-space: pre-line;
}

/* Quiz Action Footer */
.quiz-footer-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.middle-status-indicator {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
}

.status-dot.active {
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
}

/* ==========================================================================
   QUESTION PALETTE DRAWER (Fixed & Fully Non-Obtrusive)
   ========================================================================== */
.palette-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 320px;
  max-width: 88vw;
  height: 100vh;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border-color);
  z-index: 2000;
  padding: 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  box-shadow: -8px 0 25px rgba(0, 0, 0, 0.4);
  /* Hidden securely using transform so it NEVER leaks onto screen */
  transform: translateX(105%);
  visibility: hidden;
  pointer-events: none;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.3s ease;
}

.palette-drawer.open {
  transform: translateX(0);
  visibility: visible;
  pointer-events: auto;
}

.palette-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1999;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.palette-overlay.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.palette-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.palette-drawer-header h3 {
  font-size: 1.15rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.palette-legend {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-color);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.leg-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-sm);
}

.leg-dot.answered { background: var(--success); }
.leg-dot.marked { background: var(--warning); }
.leg-dot.unvisited { background: var(--bg-card); border: 1px solid var(--border-color); }

.palette-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.65rem;
  overflow-y: auto;
  padding-right: 4px;
}

.palette-q-btn {
  height: 44px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.palette-q-btn:hover {
  border-color: var(--primary);
  transform: scale(1.06);
}

.palette-q-btn.current {
  border: 2px solid var(--primary);
  box-shadow: 0 0 10px var(--primary-glow);
}

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

.palette-q-btn.marked {
  background: var(--warning);
  color: #fff;
  border-color: var(--warning);
}

/* --- RESULT & SCORECARD SCREEN --- */
.result-container {
  max-width: 750px;
  margin: 0 auto;
  padding: 1rem 0;
}

.result-hero-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.result-badge-top {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  padding: 0.4rem 1.1rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 14px var(--primary-glow);
}

/* Circular Gauge */
.score-circle-wrapper {
  width: 170px;
  height: 170px;
  margin: 0 auto 1.5rem;
  position: relative;
}

.circle-svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.circle-bg {
  fill: none;
  stroke: var(--bg-secondary);
  stroke-width: 8;
}

.circle-progress {
  fill: none;
  stroke: var(--primary);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 283;
  stroke-dashoffset: 283;
  transition: stroke-dashoffset 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.score-circle-content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.score-big {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  color: var(--text-primary);
}

.score-percent {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--secondary);
  margin-top: 4px;
}

.result-headline {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.result-subtext {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 550px;
  margin: 0 auto 2rem;
}

/* Result Stats 4-Grid */
.result-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2.25rem;
}

.result-stat-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 0.75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
}

.result-stat-box .stat-icon {
  font-size: 1.2rem;
}

.stat-correct .stat-icon { color: var(--success); }
.stat-wrong .stat-icon { color: var(--danger); }
.stat-skipped .stat-icon { color: var(--text-muted); }
.stat-time .stat-icon { color: var(--secondary); }

.stat-value {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
}

.result-actions-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.85rem;
}

/* --- REVIEW SOLUTIONS SCREEN --- */
.review-container {
  max-width: 900px;
  margin: 0 auto;
}

.review-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.75rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.review-header-bar h2 {
  font-size: 1.4rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.review-header-bar p {
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.review-filters {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.review-filter-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.review-filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.review-cards-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.review-card.is-correct {
  border-left: 5px solid var(--success);
}

.review-card.is-incorrect {
  border-left: 5px solid var(--danger);
}

.review-card.is-skipped {
  border-left: 5px solid var(--text-muted);
}

.review-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.review-card-tags {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.review-status-pill {
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.review-status-pill.correct { background: var(--success-bg); color: var(--success); }
.review-status-pill.incorrect { background: var(--danger-bg); color: var(--danger); }
.review-status-pill.skipped { background: rgba(255, 255, 255, 0.08); color: var(--text-muted); }

.review-q-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  white-space: pre-line;
}

.review-answers-grid {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: 1.25rem;
}

.review-opt {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

.review-opt.user-picked-wrong {
  background: var(--danger-bg);
  border-color: var(--danger-border);
  color: var(--danger);
  font-weight: 600;
}

.review-opt.is-correct-target {
  background: var(--success-bg);
  border-color: var(--success-border);
  color: var(--success);
  font-weight: 600;
}

.review-explanation-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-top: 1rem;
}

.review-explanation-box h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.review-explanation-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  white-space: pre-line;
}

/* ==========================================================================
   CLEAN & PROFESSIONAL FOOTER (Designed and Maintained by Sachin Kumar)
   ========================================================================== */
.app-footer {
  margin-top: auto;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 1.75rem 1.25rem;
  transition: all var(--transition-normal);
}

.footer-container-clean {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}

.footer-text {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.portfolio-link-simple {
  color: var(--primary);
  text-decoration: none;
  font-weight: 700;
  margin-left: 0.2rem;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  border-bottom: 1.5px solid transparent;
}

.portfolio-link-simple:hover {
  color: var(--secondary);
  border-bottom-color: var(--secondary);
}

.footer-tagline {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ==========================================================================
   RESPONSIVE DESIGN (Mobile, Tablet, Desktop)
   ========================================================================== */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }

  .settings-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .domain-card.featured-card {
    grid-template-columns: 1fr;
    text-align: left;
  }

  .domain-grid {
    grid-template-columns: 1fr;
  }

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

  .middle-status-indicator {
    display: none;
  }

  .quiz-meta-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .meta-right {
    width: 100%;
    justify-content: space-between;
  }
}