/* ========================================
   Capitol Boxes — Base Styles & Layout
   ======================================== */

:root {
  /* Background & Surface */
  --bg-primary: #1a1f2e;
  --bg-surface: #242b3d;
  --bg-board: #2a3245;

  /* Player Colors (colorblind-safe: blue vs orange) */
  --player-color: #4a9eff;
  --player-fill: rgba(74, 158, 255, 0.15);
  --player-fill-solid: #2a4a6e;
  --ai-color: #ff8c42;
  --ai-fill: rgba(255, 140, 66, 0.15);
  --ai-fill-solid: #6e4a2a;

  /* Accents */
  --gold: #d4a84b;
  --cream: #f0e6d0;
  --correct: #4ecb71;
  --incorrect: #e74c5f;

  /* Dots & Lines */
  --dot-color: #8899aa;
  --dot-hover: #ffffff;
  --edge-undrawn: #3a4558;
  --edge-drawn: #c0cad8;

  /* Typography */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: system-ui, -apple-system, 'Segoe UI', sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--cream);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* ========================================
   Screen System
   ======================================== */

.screen {
  display: none;
  width: 100%;
  height: 100%;
}

.screen.active {
  display: flex;
  flex-direction: column;
}

/* ========================================
   Menu Screen
   ======================================== */

.menu-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 2rem;
  gap: 2.5rem;
}

.menu-header {
  text-align: center;
}

.menu-icon {
  font-size: 3.5rem;
  color: var(--gold);
  margin-bottom: 0.5rem;
}

.menu-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 900;
  color: var(--gold);
  letter-spacing: 0.02em;
  line-height: 1.1;
}

.menu-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--cream);
  opacity: 0.7;
  margin-top: 0.5rem;
}

.menu-options {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  width: 100%;
  max-width: 420px;
}

.menu-label {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--cream);
  opacity: 0.6;
}

.difficulty-buttons {
  display: flex;
  gap: 0.75rem;
  width: 100%;
}

.diff-btn {
  flex: 1;
  background: var(--bg-surface);
  border: 2px solid var(--edge-undrawn);
  border-radius: 8px;
  padding: 1rem 0.75rem;
  color: var(--cream);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
  font-family: var(--font-body);
}

.diff-btn .diff-name {
  display: block;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.diff-btn .diff-desc {
  display: block;
  font-size: 0.75rem;
  opacity: 0.6;
}

.diff-btn:hover {
  border-color: var(--gold);
  background: var(--bg-board);
}

.diff-btn.selected {
  border-color: var(--gold);
  background: rgba(212, 168, 75, 0.15);
}

.start-button {
  width: 100%;
  padding: 1rem 2rem;
  background: var(--gold);
  color: var(--bg-primary);
  border: none;
  border-radius: 8px;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-top: 0.5rem;
}

.start-button:hover {
  background: #e0b85e;
  transform: translateY(-1px);
}

.menu-footer {
  text-align: center;
  font-size: 0.8rem;
  opacity: 0.4;
}

/* ========================================
   Game Header
   ======================================== */

.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 1.5rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--edge-undrawn);
  height: 48px;
  flex-shrink: 0;
}

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

.header-icon {
  font-size: 1.4rem;
  color: var(--gold);
}

.header-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--gold);
}

.difficulty-dropdown {
  background: var(--bg-primary);
  color: var(--cream);
  border: 1px solid var(--edge-undrawn);
  border-radius: 4px;
  padding: 0.3rem 0.6rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  cursor: pointer;
}

/* ========================================
   Game Layout
   ======================================== */

.game-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ========================================
   Score Panel (Sidebar)
   ======================================== */

.score-panel {
  width: 200px;
  background: var(--bg-surface);
  border-right: 1px solid var(--edge-undrawn);
  display: flex;
  flex-direction: column;
  padding: 1.25rem;
  gap: 1rem;
  flex-shrink: 0;
}

.score-card {
  text-align: center;
}

.score-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.7;
  margin-bottom: 0.25rem;
}

.player-score-card .score-label {
  color: var(--player-color);
}

.ai-score-card .score-label {
  color: var(--ai-color);
}

.score-number {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1;
}

.player-score-card .score-number {
  color: var(--player-color);
}

.ai-score-card .score-number {
  color: var(--ai-color);
}

.score-bar-container {
  height: 6px;
  background: var(--bg-primary);
  border-radius: 3px;
  margin-top: 0.5rem;
  overflow: hidden;
}

.score-bar {
  height: 100%;
  border-radius: 3px;
  width: 0%;
  transition: width 0.4s ease;
}

.player-bar {
  background: var(--player-color);
}

.ai-bar {
  background: var(--ai-color);
}

.score-divider {
  height: 1px;
  background: var(--edge-undrawn);
}

.stats-panel {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.stat-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
}

.stat-label {
  opacity: 0.6;
}

.stat-value {
  font-weight: 700;
}

#streak-value {
  color: var(--gold);
}

/* ========================================
   Board Area
   ======================================== */

.board-area {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: var(--bg-board);
}

/* ========================================
   Status Bar
   ======================================== */

.status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1.5rem;
  background: var(--bg-surface);
  border-top: 1px solid var(--edge-undrawn);
  height: 44px;
  flex-shrink: 0;
}

.help-button {
  background: none;
  border: 1px solid var(--edge-undrawn);
  color: var(--cream);
  opacity: 0.6;
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  font-size: 0.8rem;
  cursor: pointer;
  font-family: var(--font-body);
  transition: opacity 0.2s;
}

.help-button:hover {
  opacity: 1;
}

.status-message {
  font-size: 0.95rem;
  color: var(--cream);
  opacity: 0.85;
  transition: opacity 0.3s;
  text-align: right;
  flex: 1;
  margin-left: 1rem;
}

.status-message.ai-speaking {
  color: var(--ai-color);
  font-style: italic;
}

/* ========================================
   Animations
   ======================================== */

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

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

@keyframes correctFlash {
  0% { background-color: var(--correct); }
  100% { background-color: transparent; }
}

@keyframes incorrectFlash {
  0% { background-color: var(--incorrect); }
  100% { background-color: transparent; }
}

@keyframes boxClaim {
  0% { transform: scale(0.8); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}