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

:root {
  --bg: #0a0e17;
  --bg-subtle: #111827;
  --bg-card: rgba(16, 23, 38, 0.85);
  --bg-card-hover: rgba(24, 34, 53, 0.95);
  --border: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(56, 189, 248, 0.4);

  --accent-teal: #2dd4bf;
  --accent-cyan: #38bdf8;
  --accent-violet: #a78bfa;
  --accent-amber: #fbbf24;
  --accent-emerald: #34d399;
  --accent-rose: #fb7185;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Outfit', 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

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

html, body {
  background: var(--bg);
  color: var(--text-main);
  font-family: var(--font-sans);
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

/* App Header */
.game-header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 52px;
  padding: 0 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 50;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 500;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  transition: all 0.15s ease;
}

.header-back-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
}

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

.header-game-icon {
  font-size: 1.25rem;
}

.header-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #fff;
}

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

.room-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.header-icon-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.65rem;
  font-size: 0.82rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.15s ease;
}

.header-icon-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

/* Modal / Overlay */
.lobby-overlay {
  position: fixed;
  inset: 0;
  background: rgba(6, 9, 15, 0.82);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  z-index: 100;
  animation: fadeIn 0.2s ease-out;
}

.lobby-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  max-width: 440px;
  width: 100%;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  text-align: center;
}

.lobby-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.35rem;
}

.lobby-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.mode-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.mode-btn {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.9rem 1.1rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  color: #fff;
  font-family: var(--font-sans);
  text-align: left;
  cursor: pointer;
  transition: all 0.15s ease;
}

.mode-btn:hover {
  background: rgba(56, 189, 248, 0.1);
  border-color: rgba(56, 189, 248, 0.35);
  transform: translateY(-1px);
}

.mode-btn.primary {
  background: rgba(56, 189, 248, 0.15);
  border-color: rgba(56, 189, 248, 0.4);
}
.mode-btn.primary:hover {
  background: rgba(56, 189, 248, 0.25);
  border-color: var(--accent-cyan);
}

.mode-btn-icon {
  font-size: 1.4rem;
  width: 32px;
  text-align: center;
}

.mode-btn-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.15rem;
}

.mode-btn-subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.join-row {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.code-input {
  flex: 1;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  color: #fff;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  letter-spacing: 0.15em;
  text-align: center;
  text-transform: uppercase;
  outline: none;
  transition: border-color 0.15s ease;
}

.code-input:focus {
  border-color: var(--accent-cyan);
}

.action-btn {
  padding: 0.75rem 1.25rem;
  background: var(--accent-cyan);
  color: #040812;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.action-btn:hover {
  background: #7dd3fc;
  box-shadow: 0 4px 14px rgba(56, 189, 248, 0.35);
}

.toast-container {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  animation: toastUp 0.2s ease-out;
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}