/* ==========================================================================
   🏆 Tradeshow Quiz Show - Design System (CSS3 & Glassmorphism Theme)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* HSL Color System */
  --bg-dark: hsl(220, 25%, 8%);
  --bg-card: hsla(220, 25%, 14%, 0.7);
  --bg-card-hover: hsla(220, 25%, 18%, 0.85);
  --border-glass: hsla(220, 20%, 30%, 0.4);
  --border-glow: hsla(217, 89%, 61%, 0.5);

  --primary: hsl(217, 89%, 61%);        /* Google Cloud Blue */
  --primary-glow: hsla(217, 89%, 61%, 0.35);
  --secondary: hsl(158, 79%, 42%);      /* High-contrast Green */
  --accent: hsl(43, 96%, 56%);          /* Gold/Amber for #1 Rank */
  --silver: hsl(210, 16%, 82%);          /* Silver for #2 Rank */
  --bronze: hsl(24, 75%, 50%);           /* Bronze for #3 Rank */
  --danger: hsl(354, 70%, 54%);

  --text-main: hsl(0, 0%, 98%);
  --text-muted: hsl(215, 15%, 70%);
  --text-dim: hsl(215, 12%, 50%);

  --font-heading: 'Outfit', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  --shadow-glow: 0 0 25px var(--primary-glow);
  --glass-blur: blur(16px);
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(circle at 10% 20%, hsla(217, 89%, 61%, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, hsla(158, 79%, 42%, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, hsla(260, 60%, 40%, 0.08) 0%, transparent 60%);
  background-attachment: fixed;
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

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

/* Glassmorphic Container & Cards */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  transition: all 0.3s ease;
}

.glass-panel:hover {
  border-color: var(--border-glow);
}

/* App Header Header Bar */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border-glass);
  background: hsla(220, 25%, 10%, 0.8);
  backdrop-filter: var(--glass-blur);
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand-badge {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-badge img, .brand-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.brand-title h1 {
  font-size: 1.35rem;
  background: linear-gradient(90deg, #fff, var(--text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-subtitle {
  font-size: 0.8rem;
  color: var(--primary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Form Components */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-input, .form-select {
  width: 100%;
  padding: 0.85rem 1.1rem;
  background: hsla(220, 25%, 8%, 0.8);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus, .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), hsl(217, 89%, 48%));
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 35px var(--primary);
}

.btn-secondary {
  background: hsla(220, 20%, 25%, 0.8);
  color: var(--text-main);
  border: 1px solid var(--border-glass);
}

.btn-secondary:hover {
  background: hsla(220, 20%, 30%, 0.9);
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-danger:hover {
  opacity: 0.9;
}

/* ==========================================================================
   📱 KIOSK UI STYLES
   ========================================================================== */

.kiosk-container {
  max-width: 680px;
  margin: 2.5rem auto;
  padding: 0 1.25rem;
}

.quiz-card {
  padding: 2.5rem;
}

.timer-bar-container {
  width: 100%;
  height: 8px;
  background: hsla(220, 20%, 20%, 0.8);
  border-radius: var(--radius-full);
  margin-bottom: 2rem;
  overflow: hidden;
}

.timer-bar {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--secondary), var(--primary), var(--accent));
  transition: width 0.1s linear;
}

.question-graphic {
  width: 100%;
  max-height: 240px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
  border: 1px solid var(--border-glass);
}

.question-text {
  font-size: 1.35rem;
  margin-bottom: 1.75rem;
  line-height: 1.4;
}

.options-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}

@media (min-width: 520px) {
  .options-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.option-btn {
  background: hsla(220, 25%, 18%, 0.8);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  padding: 1.1rem 1.25rem;
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 1rem;
  text-align: left;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.option-btn:hover {
  background: hsla(217, 89%, 61%, 0.2);
  border-color: var(--primary);
  transform: translateY(-2px);
}

.option-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  background: hsla(220, 20%, 30%, 0.6);
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--primary);
  flex-shrink: 0;
}

.option-btn.correct {
  background: hsla(158, 79%, 42%, 0.35) !important;
  border-color: #00e676 !important;
  color: #ffffff !important;
  transform: scale(1.02);
  box-shadow: 0 0 15px rgba(0, 230, 118, 0.5);
}

.option-btn.incorrect {
  background: hsla(0, 79%, 42%, 0.35) !important;
  border-color: #ff5252 !important;
  color: #ff8a80 !important;
  opacity: 0.7;
  animation: shake 0.3s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

/* ==========================================================================
   📺 TV LEADERBOARD STYLES (4K / 1080p Display Optimized)
   ========================================================================== */

.tv-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
}

.tv-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.tv-header h1 {
  font-size: 3rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: linear-gradient(135deg, #fff 30%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.tv-header .event-tag {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.4rem 1.25rem;
  background: hsla(217, 89%, 61%, 0.15);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-full);
  color: var(--primary);
  font-weight: 600;
  font-size: 1.1rem;
}

.leaderboard-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0 0.65rem;
}

.leaderboard-table th {
  padding: 0.75rem 1.5rem;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-align: left;
}

.leaderboard-row {
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  border-radius: var(--radius-md);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.leaderboard-row td {
  padding: 1.1rem 1.5rem;
  vertical-align: middle;
}

.leaderboard-row td:first-child {
  border-top-left-radius: var(--radius-sm);
  border-bottom-left-radius: var(--radius-sm);
}

.leaderboard-row td:last-child {
  border-top-right-radius: var(--radius-sm);
  border-bottom-right-radius: var(--radius-sm);
}

/* Rank Badges */
.rank-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  background: hsla(220, 20%, 25%, 0.8);
  color: var(--text-muted);
}

.leaderboard-row.rank-1 .rank-badge {
  background: linear-gradient(135deg, var(--accent), hsl(35, 100%, 45%));
  color: #111;
  box-shadow: 0 0 20px hsla(43, 96%, 56%, 0.6);
}

.leaderboard-row.rank-2 .rank-badge {
  background: linear-gradient(135deg, var(--silver), hsl(210, 10%, 65%));
  color: #111;
  box-shadow: 0 0 15px hsla(210, 16%, 82%, 0.4);
}

.leaderboard-row.rank-3 .rank-badge {
  background: linear-gradient(135deg, var(--bronze), hsl(24, 75%, 35%));
  color: #fff;
  box-shadow: 0 0 15px hsla(24, 75%, 50%, 0.4);
}

.player-name {
  font-size: 1.25rem;
  font-weight: 600;
}

.player-company {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.player-time {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--secondary);
  text-align: right;
}

/* Flash animation for new top score */
@keyframes rankFlash {
  0% { transform: scale(1.02); background: hsla(217, 89%, 61%, 0.3); }
  100% { transform: scale(1); }
}

.leaderboard-row.flash-update {
  animation: rankFlash 1.2s ease-out;
}

/* ==========================================================================
   ⚙️ ADMIN CONSOLE STYLES
   ========================================================================== */

.admin-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: calc(100vh - 75px);
}

.admin-sidebar {
  background: hsla(220, 25%, 10%, 0.9);
  border-right: 1px solid var(--border-glass);
  padding: 1.5rem 1rem;
}

.nav-tabs {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.nav-tab {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-tab:hover, .nav-tab.active {
  background: hsla(217, 89%, 61%, 0.15);
  color: var(--primary);
}

.admin-content {
  padding: 2rem;
}

.admin-section {
  display: none;
}

.admin-section.active {
  display: block;
}

/* Modal Overlays */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  width: 90%;
  max-width: 540px;
  padding: 2.25rem;
}