/* ================================================
   SINAVTIMER 2026 - Premium Design System
   ================================================ */

/* --- CSS Variables (Dark Theme - Default) --- */
:root {
  --bg-base: #0a0a1a;
  --bg-surface: rgba(15, 15, 35, 0.85);
  --bg-elevated: rgba(25, 25, 55, 0.9);
  --bg-card: rgba(20, 20, 45, 0.75);
  
  --text-primary: #f0f0ff;
  --text-secondary: #a8a8c8;
  --text-muted: #6b6b8d;
  
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-tertiary: #a855f7;
  --accent-success: #10b981;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;
  
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
  --gradient-success: linear-gradient(135deg, #10b981 0%, #34d399 100%);
  --gradient-glow: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-main: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* --- Light Theme --- */
[data-theme='light'] {
  --bg-base: #f5f5ff;
  --bg-surface: rgba(255, 255, 255, 0.9);
  --bg-elevated: rgba(255, 255, 255, 0.95);
  --bg-card: rgba(255, 255, 255, 0.85);
  
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a6a;
  --text-muted: #7a7a9a;
  
  --accent-primary: #4f46e5;
  --accent-secondary: #7c3aed;
  --accent-tertiary: #9333ea;
  
  --glass-bg: rgba(255, 255, 255, 0.6);
  --glass-border: rgba(0, 0, 0, 0.08);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  
  --gradient-glow: radial-gradient(circle, rgba(79, 70, 229, 0.08) 0%, transparent 70%);
}

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

html {
  scroll-behavior: smooth;
}

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

/* --- Animated Background --- */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
  z-index: 0;
}

[data-theme='light'] .bg-grid {
  background-image: 
    linear-gradient(rgba(79, 70, 229, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79, 70, 229, 0.05) 1px, transparent 1px);
}

.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
  z-index: 0;
  animation: float 20s ease-in-out infinite;
}

.bg-glow-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.2) 0%, transparent 70%);
  top: -200px;
  right: -100px;
}

.bg-glow-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
  bottom: -150px;
  left: -100px;
  animation-delay: -7s;
}

.bg-glow-3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.12) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: -14s;
}

[data-theme='light'] .bg-glow {
  opacity: 0.5;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(30px, -30px) scale(1.05); }
  50% { transform: translate(-20px, 20px) scale(0.95); }
  75% { transform: translate(20px, 30px) scale(1.02); }
}

/* --- App Container --- */
.app {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px 20px 40px;
}

/* --- Unified Header --- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 24px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--glass-shadow);
  margin-bottom: 20px;
  animation: slideDown 0.5s ease-out;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.back-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  font-size: 1.4rem;
  color: var(--text-primary);
  background: var(--bg-elevated);
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
}

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

.logo-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  transition: var(--transition);
}

.logo-group:hover {
  opacity: 0.85;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  font-size: 1.8rem;
  filter: drop-shadow(0 0 10px rgba(99, 102, 241, 0.5));
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.app-title {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.date-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 999px;
  letter-spacing: 0.02em;
}

.header-right {
  display: flex;
  align-items: center;
}

.theme-btn {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  cursor: pointer;
  overflow: hidden;
  transition: var(--transition);
}

.theme-btn:hover {
  border-color: var(--accent-primary);
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
}

.theme-icon {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: var(--transition);
}

.theme-icon-sun {
  opacity: 0;
  transform: rotate(-90deg) scale(0);
}

.theme-icon-moon {
  opacity: 1;
  transform: rotate(0) scale(1);
}

[data-theme='light'] .theme-icon-sun {
  opacity: 1;
  transform: rotate(0) scale(1);
}

[data-theme='light'] .theme-icon-moon {
  opacity: 0;
  transform: rotate(90deg) scale(0);
}

/* --- Views --- */
.view {
  display: none;
  animation: fadeIn 0.4s ease-out;
}

.view.active {
  display: block;
}

/* --- Favorites Section --- */
.favorites-section {
  background: linear-gradient(135deg, rgba(251, 191, 36, 0.1) 0%, rgba(245, 158, 11, 0.05) 100%);
  border: 1px solid rgba(251, 191, 36, 0.2);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  margin-bottom: 20px;
  animation: fadeIn 0.4s ease-out;
}

.favorites-header {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  user-select: none;
}

.favorites-header:hover .favorites-toggle {
  background: rgba(251, 191, 36, 0.2);
}

.favorites-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  font-size: 1rem;
  color: var(--accent-warning);
  background: rgba(251, 191, 36, 0.1);
  border: 1px solid rgba(251, 191, 36, 0.3);
  border-radius: 50%;
  transition: var(--transition);
}

.favorites-toggle.expanded {
  transform: rotate(180deg);
}

.favorites-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-warning);
  flex: 1;
}

.favorites-title span {
  font-size: 1.1rem;
}

.favorites-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 26px;
  height: 26px;
  padding: 0 8px;
  font-size: 0.8rem;
  font-weight: 700;
  color: white;
  background: var(--accent-warning);
  border-radius: 999px;
}

.favorites-content {
  overflow: hidden;
  transition: max-height 0.4s ease-out, opacity 0.3s ease-out, margin 0.3s ease-out;
}

.favorites-content.collapsed {
  max-height: 0;
  opacity: 0;
  margin-top: 0;
}

.favorites-content.expanded {
  max-height: 2000px;
  opacity: 1;
  margin-top: 16px;
}

/* Compact grid (default) */
.favorites-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}

/* Expanded grid - büyük kartlar */
.favorites-grid.expanded {
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}

/* Favorite card - büyük versiyon */
.favorite-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  cursor: pointer;
  transition: var(--transition);
  overflow: hidden;
}

.favorite-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-warning), #fbbf24);
  opacity: 1;
}

.favorite-card:hover {
  border-color: var(--accent-warning);
  transform: translateY(-3px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2), 0 0 20px rgba(251, 191, 36, 0.1);
}

.favorite-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
}

.favorite-card-info {
  flex: 1;
  min-width: 0;
}

.favorite-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.favorite-group {
  display: inline-block;
  padding: 3px 10px;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-warning);
  background: rgba(251, 191, 36, 0.1);
  border: 1px solid rgba(251, 191, 36, 0.3);
  border-radius: 999px;
}

.favorite-remove {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  font-size: 0.9rem;
  color: var(--text-muted);
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

.favorite-remove:hover {
  color: var(--accent-danger);
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--accent-danger);
}

.favorite-countdown {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 16px;
  margin: 12px 0;
  background: rgba(251, 191, 36, 0.05);
  border-radius: var(--radius-md);
}

.favorite-countdown-number {
  font-family: var(--font-mono);
  font-size: 2.8rem;
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(135deg, var(--accent-warning), #fbbf24);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.favorite-countdown-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 6px;
}

.favorite-date {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-align: center;
}

.favorite-date-icon {
  margin-right: 6px;
}

/* Star button on exam cards */
.star-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  font-size: 1.1rem;
  color: var(--text-muted);
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

.star-btn:hover {
  color: var(--accent-warning);
  border-color: var(--accent-warning);
  transform: scale(1.1);
}

.star-btn.active {
  color: var(--accent-warning);
  background: rgba(251, 191, 36, 0.15);
  border-color: var(--accent-warning);
}

.star-btn.active:hover {
  background: rgba(251, 191, 36, 0.25);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Controls Panel --- */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
}

.controls {
  padding: 16px 20px;
  margin-bottom: 20px;
}

.control-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  align-items: end;
}

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

.control-group label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.control-icon {
  font-size: 0.85rem;
}

select, input[type='text'] {
  width: 100%;
  padding: 10px 14px;
  font-family: var(--font-main);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
  background: var(--bg-elevated);
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: var(--transition);
  cursor: pointer;
}

select:hover, input[type='text']:hover {
  border-color: var(--accent-primary);
}

select:focus, input[type='text']:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

input::placeholder {
  color: var(--text-muted);
}

/* --- Toggle Switch --- */
.control-group-toggle {
  justify-content: flex-end;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}

.toggle-label input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.toggle-track {
  position: relative;
  width: 44px;
  height: 24px;
  background: var(--bg-elevated);
  border: 2px solid var(--glass-border);
  border-radius: 999px;
  transition: var(--transition);
}

.toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: var(--transition);
}

.toggle-label input:checked + .toggle-track {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}

.toggle-label input:checked + .toggle-track .toggle-thumb {
  left: 22px;
  background: white;
}

.toggle-text {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* --- Exam Grid --- */
.exam-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

/* --- Exam Card --- */
.exam-card {
  position: relative;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
  animation: cardEnter 0.5s ease-out both;
}

@keyframes cardEnter {
  from { opacity: 0; transform: translateY(20px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.exam-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: var(--transition);
}

.exam-card:hover {
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 30px rgba(99, 102, 241, 0.1);
}

.exam-card:hover::before {
  opacity: 1;
}

.exam-card-selected {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2), 0 20px 40px rgba(99, 102, 241, 0.2);
}

.exam-card-selected::before {
  opacity: 1;
}

/* --- Card Header --- */
.exam-card-header {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
}

.exam-header-info {
  flex: 1;
  min-width: 0;
}

.exam-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 6px;
}

.exam-group {
  display: inline-block;
  padding: 3px 10px;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 999px;
}

/* --- Countdown Display --- */
.exam-countdown {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 16px;
  margin: 12px 0;
  background: var(--gradient-glow);
  border-radius: var(--radius-md);
}

.countdown-number {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
  line-height: 1;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 15px rgba(99, 102, 241, 0.3));
}

.countdown-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-top: 6px;
}

.countdown-past .countdown-number {
  background: linear-gradient(135deg, var(--accent-danger), #f87171);
  -webkit-background-clip: text;
  background-clip: text;
}

.countdown-today .countdown-number {
  background: var(--gradient-success);
  -webkit-background-clip: text;
  background-clip: text;
  animation: pulse 1s ease-in-out infinite;
}

/* --- Card Meta Info --- */
.exam-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.meta-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
}

.meta-pill-icon {
  font-size: 0.8rem;
}

/* --- Progress Bar --- */
.progress-wrapper {
  margin-top: auto;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.progress-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.progress-percent {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.progress-track {
  position: relative;
  height: 8px;
  background: var(--bg-elevated);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--glass-border);
}

.progress-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 999px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.5);
}

.progress-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* ============================================
   DETAIL VIEW
   ============================================ */

.view-detail {
  min-height: 60vh;
}

.detail-container {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--glass-shadow);
  padding: 32px;
  animation: scaleIn 0.4s ease-out;
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.detail-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--glass-border);
}

.detail-title {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
}

.detail-group {
  padding: 6px 16px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: white;
  background: var(--gradient-primary);
  border-radius: 999px;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.detail-countdown {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 48px 32px;
  margin: 24px 0;
  background: var(--gradient-glow);
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
}

.detail-countdown-number {
  font-family: var(--font-mono);
  font-size: 7rem;
  font-weight: 700;
  line-height: 1;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 40px rgba(99, 102, 241, 0.4));
  animation: countPulse 3s ease-in-out infinite;
}

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

.detail-countdown-label {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-top: 12px;
}

.detail-countdown.countdown-past .detail-countdown-number {
  background: linear-gradient(135deg, var(--accent-danger), #f87171);
  -webkit-background-clip: text;
  background-clip: text;
}

.detail-countdown.countdown-today .detail-countdown-number {
  background: var(--gradient-success);
  -webkit-background-clip: text;
  background-clip: text;
}

.detail-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

.detail-info-card {
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
}

.detail-info-icon {
  font-size: 1.6rem;
  margin-bottom: 10px;
}

.detail-info-value {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 4px;
}

.detail-info-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.detail-progress {
  margin-top: 24px;
  padding: 20px;
  background: var(--bg-elevated);
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
}

.detail-progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.detail-progress-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.detail-progress-percent {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.detail-progress-track {
  position: relative;
  height: 16px;
  background: var(--bg-card);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--glass-border);
}

.detail-progress-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 999px;
  transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.5);
}

.detail-progress-fill::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: shimmer 2s infinite;
}

.detail-progress-status {
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- Footer --- */
.app-footer {
  margin-top: 32px;
  text-align: center;
}

.app-footer p {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-icon {
  font-size: 0.9rem;
}

/* --- Empty State --- */
.empty-state {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  text-align: center;
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: 12px;
  opacity: 0.5;
}

.empty-text {
  font-size: 1rem;
  color: var(--text-muted);
}

/* --- Responsive Design --- */
@media (max-width: 900px) {
  .app {
    padding: 16px 16px 32px;
  }

  .app-header {
    padding: 12px 16px;
  }

  .app-title {
    font-size: 1.2rem;
  }

  .date-badge {
    font-size: 0.75rem;
    padding: 6px 12px;
  }

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

  .exam-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 12px;
  }

  .detail-container {
    padding: 24px;
  }

  .detail-title {
    font-size: 1.4rem;
  }

  .detail-countdown-number {
    font-size: 5rem;
  }

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

@media (max-width: 640px) {
  .app-header {
    gap: 12px;
  }

  .app-title {
    font-size: 1.1rem;
  }

  .logo-icon {
    font-size: 1.4rem;
  }

  .date-badge {
    font-size: 0.7rem;
    padding: 4px 10px;
  }

  .control-row {
    grid-template-columns: 1fr 1fr;
  }

  .control-group-toggle {
    grid-column: span 2;
    justify-content: flex-start;
  }

  .controls {
    padding: 14px 16px;
  }

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

  .exam-card {
    padding: 16px;
  }

  .countdown-number {
    font-size: 2.5rem;
  }

  .detail-header {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .detail-countdown {
    padding: 32px 16px;
  }

  .detail-countdown-number {
    font-size: 4rem;
  }

  .detail-countdown-label {
    font-size: 1rem;
  }

  .detail-info-grid {
    grid-template-columns: 1fr 1fr;
  }

  .detail-info-value {
    font-size: 1.2rem;
  }
}

/* --- Card animation delays --- */
.exam-card:nth-child(1) { animation-delay: 0.05s; }
.exam-card:nth-child(2) { animation-delay: 0.1s; }
.exam-card:nth-child(3) { animation-delay: 0.15s; }
.exam-card:nth-child(4) { animation-delay: 0.2s; }
.exam-card:nth-child(5) { animation-delay: 0.25s; }
.exam-card:nth-child(6) { animation-delay: 0.3s; }
.exam-card:nth-child(7) { animation-delay: 0.35s; }
.exam-card:nth-child(8) { animation-delay: 0.4s; }
.exam-card:nth-child(9) { animation-delay: 0.45s; }
.exam-card:nth-child(10) { animation-delay: 0.5s; }
.exam-card:nth-child(11) { animation-delay: 0.55s; }
.exam-card:nth-child(12) { animation-delay: 0.6s; }

/* --- Print styles --- */
@media print {
  .bg-grid, .bg-glow, .theme-btn, .controls, .back-btn {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .app-header, .exam-card, .detail-container {
    background: white;
    border: 1px solid #ddd;
    box-shadow: none;
  }
}