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

:root {
  /* Colors - Light Theme Default */
  --bg-primary: #f5f5f7;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f2f2f7;
  --text-primary: #1d1d1f;
  --text-secondary: #86868b;
  --text-tertiary: #a1a1a6;
  --border-color: #d2d2d7;
  
  /* System Accents */
  --accent-color: #0071e3;
  --accent-light: rgba(0, 113, 227, 0.1);
  --success-color: #34c759;
  --success-light: rgba(52, 199, 89, 0.1);
  --warning-color: #ff9500;
  --danger-color: #ff3b30;
  --danger-light: rgba(255, 59, 48, 0.1);
  
  /* UI Configs */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 20px;
  --border-radius-circle: 50%;
  --transition-smooth: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.05);
  --shadow-medium: 0 8px 30px rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #000000;
    --bg-secondary: #161617;
    --bg-tertiary: #1d1d1f;
    --text-primary: #f5f5f7;
    --text-secondary: #86868b;
    --text-tertiary: #48484a;
    --border-color: #323236;
    --accent-color: #2997ff;
    --accent-light: rgba(41, 151, 255, 0.15);
    --success-color: #30d158;
    --success-light: rgba(48, 209, 88, 0.15);
    --warning-color: #ff9f0a;
    --danger-color: #ff453a;
    --danger-light: rgba(255, 69, 58, 0.15);
    --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.35);
    --shadow-medium: 0 8px 30px rgba(0, 0, 0, 0.5);
  }
}

/* Reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  display: flex;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Main Layout */
.app-container {
  display: flex;
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  height: 100vh;
  overflow: hidden;
  position: relative;
}

.game-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 40px;
  overflow-y: auto;
  position: relative;
  transition: var(--transition-smooth);
}

/* Sidebar Leaderboard */
.sidebar {
  width: 320px;
  background-color: var(--bg-secondary);
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 30px;
  transition: var(--transition-smooth);
}

@media (max-width: 1024px) {
  .app-container {
    flex-direction: column;
    height: auto;
    overflow: auto;
  }
  .sidebar {
    width: 100%;
    border-left: none;
    border-top: 1px solid var(--border-color);
    padding: 20px;
  }
  .game-area {
    padding: 20px;
  }
}

/* Typography */
h1 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 8px;
}

h2 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.3px;
  margin-bottom: 16px;
}

h3 {
  font-size: 18px;
  font-weight: 500;
  margin-bottom: 12px;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 30px;
}

/* Forms & Inputs */
.input-group {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

input[type="text"], select {
  font-family: var(--font-sans);
  background-color: var(--bg-tertiary);
  border: 1px solid transparent;
  color: var(--text-primary);
  padding: 14px 18px;
  border-radius: var(--border-radius-md);
  font-size: 16px;
  width: 100%;
  outline: none;
  transition: var(--transition-smooth);
}

input[type="text"]:focus, select:focus {
  border-color: var(--border-color);
  background-color: var(--bg-secondary);
  box-shadow: 0 0 0 4px var(--accent-light);
}

.range-slider-container {
  display: flex;
  align-items: center;
  gap: 15px;
}

input[type="range"] {
  flex: 1;
  accent-color: var(--accent-color);
}

.slider-value {
  font-weight: 600;
  width: 30px;
  text-align: right;
}

/* Buttons */
.btn {
  font-family: var(--font-sans);
  background-color: var(--text-primary);
  color: var(--bg-secondary);
  border: none;
  padding: 14px 24px;
  border-radius: var(--border-radius-md);
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-decoration: none;
}

.btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

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

.btn-secondary:hover {
  background-color: var(--border-color);
  opacity: 1;
}

.btn-accent {
  background-color: var(--accent-color);
  color: #ffffff;
}

.btn-accent:hover {
  box-shadow: 0 4px 15px var(--accent-light);
}

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

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

/* Screens Setup */
.screen {
  display: none;
  flex-direction: column;
  flex: 1;
  animation: fadeIn 0.4s var(--transition-smooth);
}

.screen.active {
  display: flex;
}

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

/* Landing Screen */
.landing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  margin-top: 20px;
}

@media (max-width: 768px) {
  .landing-grid {
    grid-template-columns: 1fr;
  }
}

.card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* Lobby Screen */
.lobby-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 30px;
}

@media (max-width: 868px) {
  .lobby-layout {
    grid-template-columns: 1fr;
  }
}

.room-code-display {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 30px;
  text-align: center;
  margin-bottom: 25px;
  box-shadow: var(--shadow-subtle);
}

.room-code-display h3 {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 5px;
}

.room-code {
  font-size: 48px;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--text-primary);
}

.settings-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-subtle);
}

.players-list-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
}

.player-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-radius: var(--border-radius-md);
  background-color: var(--bg-tertiary);
  margin-bottom: 10px;
  animation: slideIn 0.3s cubic-bezier(0.25, 1, 0.5, 1);
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(-15px); }
  to { opacity: 1; transform: translateX(0); }
}

.player-info-badge {
  display: flex;
  align-items: center;
  gap: 8px;
}

.host-badge {
  font-size: 10px;
  background-color: var(--text-primary);
  color: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
}

.me-badge {
  font-size: 10px;
  background-color: var(--accent-light);
  color: var(--accent-color);
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
}

/* Sidebar Leaderboard List */
.sidebar-leaderboard-list {
  list-style: none;
  margin-top: 20px;
  overflow-y: auto;
  flex: 1;
}

.leaderboard-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
  animation: listUpdate 0.4s ease;
}

.leaderboard-rank-name {
  display: flex;
  align-items: center;
  gap: 12px;
}

.rank-number {
  font-size: 14px;
  font-weight: 700;
  width: 20px;
  color: var(--text-secondary);
}

.player-name-val {
  font-weight: 500;
}

.player-score-val {
  font-weight: 600;
  color: var(--text-primary);
}

/* Game Playing Screen */
.game-playing-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 40px;
}

.round-info {
  font-weight: 600;
  font-size: 18px;
}

.timer-box {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 10px 20px;
  border-radius: var(--border-radius-md);
  font-size: 24px;
  font-weight: 700;
  min-width: 100px;
  text-align: center;
  box-shadow: var(--shadow-subtle);
  transition: var(--transition-smooth);
}

.timer-box.warning {
  border-color: var(--danger-color);
  color: var(--danger-color);
  box-shadow: 0 0 10px var(--danger-light);
  animation: pulse 1s infinite alternate;
}

@keyframes pulse {
  0% { transform: scale(1); }
  100% { transform: scale(1.05); }
}

.wheel-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 40px;
  position: relative;
}

/* Stylized Alphabet Wheel */
.wheel-container {
  width: 320px;
  height: 320px;
  position: relative;
  margin: 20px auto;
  border-radius: 50%;
  background-color: var(--bg-secondary);
  border: 4px solid var(--text-primary);
  box-shadow: var(--shadow-medium);
  display: flex;
  align-items: center;
  justify-content: center;
}

.wheel-pointer {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 15px solid transparent;
  border-right: 15px solid transparent;
  border-top: 25px solid var(--text-primary);
  z-index: 10;
}

.wheel {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  transform-origin: center center;
  transition: transform 2.5s cubic-bezier(0.15, 0.85, 0.35, 1);
}

.wheel-letter {
  position: absolute;
  width: 40px;
  height: 40px;
  left: calc(50% - 20px);
  top: 10px;
  transform-origin: 50% 130px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
  color: var(--text-primary);
}

.wheel-center-cutout {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background-color: var(--bg-primary);
  border: 3px solid var(--text-primary);
  position: absolute;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  font-weight: 800;
  color: var(--text-primary);
  box-shadow: inset 0 0 10px rgba(0,0,0,0.05);
}

/* Category Inputs */
.game-inputs-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  max-width: 700px;
  margin: 0 auto;
  width: 100%;
}

.input-category-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 20px;
  box-shadow: var(--shadow-subtle);
  transition: var(--transition-smooth);
}

.input-category-card:focus-within {
  border-color: var(--accent-color);
  box-shadow: 0 4px 20px rgba(0, 113, 227, 0.05);
}

.category-label {
  font-size: 15px;
  font-weight: 600;
  min-width: 110px;
  color: var(--text-primary);
}

.category-input-wrapper {
  position: relative;
  flex: 1;
}

.letter-indicator {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  font-weight: 700;
  color: var(--text-tertiary);
  font-size: 16px;
  pointer-events: none;
}

.category-input-wrapper input {
  padding-left: 35px;
  background-color: var(--bg-tertiary);
}

/* Anti-Cheat Banner */
.cheat-warning-banner {
  background-color: var(--danger-light);
  border: 1px solid var(--danger-color);
  color: var(--danger-color);
  border-radius: var(--border-radius-md);
  padding: 15px;
  margin-bottom: 25px;
  display: none;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  font-weight: 500;
}

.cheat-warning-banner svg {
  flex-shrink: 0;
}

/* Reveal / Evaluation Screen */
.eval-status-message {
  text-align: center;
  font-size: 18px;
  color: var(--text-secondary);
  margin: 40px 0;
  font-weight: 500;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
}

.spinner {
  width: 30px;
  height: 30px;
  border: 3px solid var(--border-color);
  border-top-color: var(--text-primary);
  border-radius: 50%;
  animation: spin 1s infinite linear;
}

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

.reveal-header {
  text-align: center;
  margin-bottom: 30px;
}

.reveal-category-name {
  font-size: 36px;
  font-weight: 700;
  color: var(--accent-color);
  text-transform: uppercase;
  letter-spacing: -0.5px;
  margin-top: 5px;
}

/* 3D Card Grid */
.reveal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.reveal-card-container {
  perspective: 1000px;
  height: 180px;
}

.reveal-card {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.reveal-card-container.is-flipped .reveal-card {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: var(--border-radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-subtle);
}

.card-front {
  background-color: var(--bg-secondary);
  align-items: center;
  justify-content: center;
}

.card-front-skeleton {
  width: 80%;
  height: 15px;
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--border-color) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
  border-radius: 4px;
}

@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.card-back {
  background-color: var(--bg-secondary);
  transform: rotateY(180deg);
  justify-content: space-between;
}

.card-back.valid-card {
  border-left: 5px solid var(--success-color);
}

.card-back.invalid-card {
  border-left: 5px solid var(--danger-color);
}

.card-player-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.card-player-name {
  font-weight: 600;
  font-size: 15px;
}

.card-points {
  font-size: 18px;
  font-weight: 700;
}

.card-points.positive {
  color: var(--success-color);
}

.card-answer-text {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.2px;
  margin: 10px 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.status-badge {
  font-size: 12px;
  font-weight: 500;
  padding: 4px 8px;
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  gap: 4px;
}

.status-badge.valid {
  background-color: var(--success-light);
  color: var(--success-color);
}

.status-badge.invalid {
  background-color: var(--danger-light);
  color: var(--danger-color);
}

.flagged-warn {
  background-color: var(--danger-light);
  color: var(--danger-color);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  animation: pulse 1s infinite alternate;
}

/* Host Override UI Panel */
.host-override-controls {
  margin-top: 10px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  width: 100%;
}

.host-override-controls button {
  font-size: 11px;
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid var(--border-color);
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  font-weight: 500;
  transition: var(--transition-smooth);
}

.host-override-controls button:hover {
  background-color: var(--border-color);
}

.host-override-controls button.active-action {
  background-color: var(--accent-color);
  color: #ffffff;
  border-color: var(--accent-color);
}

.score-override-input {
  width: 50px;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 6px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  text-align: center;
}

.eval-footer-actions {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 30px;
}

/* Recap & Results Screen */
.recap-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-subtle);
  margin-bottom: 30px;
}

.recap-table-container {
  overflow-x: auto;
  margin-top: 20px;
}

.recap-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.recap-table th {
  padding: 14px 16px;
  border-bottom: 2px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
}

.recap-table td {
  padding: 16px;
  border-bottom: 1px solid var(--border-color);
  font-size: 15px;
}

.recap-table tr:last-child td {
  border-bottom: none;
}

.recap-ans {
  font-weight: 500;
}

.recap-ans.valid {
  color: var(--text-primary);
}

.recap-ans.invalid {
  color: var(--text-secondary);
  text-decoration: line-through;
  opacity: 0.6;
}

.recap-points {
  font-weight: 600;
}

.recap-points.positive {
  color: var(--success-color);
}

.recap-points.penalty {
  color: var(--danger-color);
}

/* General Layout helpers */
.text-center { text-align: center; }
.mt-4 { margin-top: 20px; }
.mb-4 { margin-bottom: 20px; }
.d-none { display: none !important; }

/* Nickname Overlay Screen */
.nickname-overlay-card {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: var(--bg-primary);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.4s var(--transition-smooth);
}

/* Profile Bar */
.name-profile-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 12px 20px;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-subtle);
  font-size: 15px;
}

/* Sidebar Chat Section */
.sidebar-chat-section {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 45%;
  border-top: 1px solid var(--border-color);
  padding-top: 15px;
}

#chat-messages {
  flex: 1;
  overflow-y: auto;
  margin-bottom: 10px;
  font-size: 13px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-content: start;
  max-height: 280px;
}

.chat-message-item {
  background-color: var(--bg-tertiary);
  padding: 8px 12px;
  border-radius: var(--border-radius-sm);
  line-height: 1.4;
  word-break: break-word;
  animation: slideIn 0.2s ease-out;
}

#chat-form {
  display: flex;
  gap: 6px;
}

#chat-input {
  flex: 1;
  padding: 10px 12px;
  font-size: 13px;
  border-radius: var(--border-radius-sm);
  background-color: var(--bg-tertiary);
  border: 1px solid transparent;
  color: var(--text-primary);
  outline: none;
}

#chat-input:focus {
  border-color: var(--border-color);
  background-color: var(--bg-secondary);
}

#chat-form button {
  padding: 10px 14px;
  font-size: 13px;
  border-radius: var(--border-radius-sm);
}

/* Round Start Countdown Overlay */
.round-countdown-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  border-radius: var(--border-radius-lg);
}

.countdown-overlay-content {
  text-align: center;
}

.countdown-large-letter {
  font-size: 140px;
  font-weight: 800;
  line-height: 1;
  color: var(--accent-color);
  margin-bottom: 15px;
  animation: popScale 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.countdown-label {
  font-size: 15px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.countdown-number {
  font-size: 64px;
  font-weight: 700;
  color: var(--text-primary);
  transition: transform 0.15s ease-in-out;
}

@keyframes popScale {
  0% { transform: scale(0.6); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

/* Scoreboard badges */
.status-badge {
  font-size: 10px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 6px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  display: inline-block;
}

.status-badge.submitted {
  background-color: var(--success-light);
  color: var(--success-color);
}

.status-badge.disconnected {
  background-color: var(--danger-light);
  color: var(--danger-color);
  opacity: 0.7;
}

.leaderboard-rank-name {
  display: flex;
  align-items: center;
  flex: 1;
  gap: 8px;
}

.disconnected-player {
  opacity: 0.55;
}

/* Submitted answer row styles */
.submitted-answer-row {
  transition: var(--transition-smooth);
}
.submitted-answer-row:hover {
  background-color: var(--bg-tertiary) !important;
}