/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0a0a1a;
  --card-bg: rgba(255,255,255,0.04);
  --border: rgba(255,255,255,0.1);
  --primary: #7c3aed;
  --primary-glow: #9d5ffc;
  --cyan: #06b6d4;
  --cyan-glow: #22d3ee;
  --x-color: #f43f5e;
  --o-color: #06b6d4;
  --text: #f0f0ff;
  --muted: #8888aa;
  --green: #10b981;
  --whatsapp: #25d366;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow-x: hidden;
  padding: 20px;
}

/* Animated background glow */
.bg-glow {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 20% 20%, rgba(124,58,237,0.18) 0%, transparent 70%),
    radial-gradient(ellipse 60% 50% at 80% 80%, rgba(6,182,212,0.15) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 440px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  animation: fadeIn 0.5s ease;
}

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

/* ===== LOGO ===== */
.logo { text-align: center; }
.logo-icon {
  font-family: 'Orbitron', monospace;
  font-size: 2.2rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--x-color), var(--primary), var(--o-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
  letter-spacing: 8px;
}
.logo h1 {
  font-family: 'Orbitron', monospace;
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}
.tagline { color: var(--muted); font-size: 0.9rem; }

/* ===== CARD ===== */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  backdrop-filter: blur(20px);
}

/* ===== INPUTS ===== */
.input-group { display: flex; flex-direction: column; gap: 8px; }
.input-group label { font-size: 0.8rem; color: var(--muted); font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; }
input[type="text"] {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
input[type="text"]:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.2);
}
input[type="text"]::placeholder { color: var(--muted); }

/* ===== BUTTONS ===== */
.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 24px;
  border-radius: 14px;
  border: none;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s ease;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-glow));
  color: white;
  box-shadow: 0 4px 24px rgba(124,58,237,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(124,58,237,0.5); }
.btn-primary:active { transform: translateY(0); }
.btn-secondary {
  background: rgba(6,182,212,0.1);
  border: 1px solid rgba(6,182,212,0.3);
  color: var(--cyan);
}
.btn-secondary:hover { background: rgba(6,182,212,0.18); border-color: var(--cyan); }
.btn-whatsapp {
  background: var(--whatsapp);
  color: white;
  box-shadow: 0 4px 20px rgba(37,211,102,0.3);
}
.btn-whatsapp:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(37,211,102,0.45); }

/* ===== DIVIDER ===== */
.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  font-size: 0.8rem;
}
.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ===== ERROR ===== */
.error-box {
  background: rgba(244,63,94,0.12);
  border: 1px solid rgba(244,63,94,0.3);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 0.9rem;
  color: #fb7185;
  text-align: center;
}

/* ===== SHARE PANEL ===== */
.share-panel {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  text-align: center;
  backdrop-filter: blur(20px);
  animation: fadeIn 0.4s ease;
}
.share-title { font-weight: 600; font-size: 1rem; color: var(--green); }
.room-link-box {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 14px;
  gap: 10px;
  font-size: 0.85rem;
  word-break: break-all;
}
.room-link-box span { flex: 1; text-align: left; color: var(--cyan); font-family: monospace; }
.copy-btn {
  background: rgba(124,58,237,0.2);
  border: 1px solid rgba(124,58,237,0.4);
  color: var(--primary-glow);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
  font-size: 0.8rem;
  white-space: nowrap;
  transition: all 0.2s;
}
.copy-btn:hover { background: rgba(124,58,237,0.35); }
.waiting-text { color: var(--muted); font-size: 0.85rem; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:0.45; } }

/* ===== GAME SCREEN ===== */
.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.player-card {
  flex: 1;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px 12px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: all 0.3s ease;
  backdrop-filter: blur(20px);
}
.player-card.active-turn {
  border-color: var(--primary);
  box-shadow: 0 0 20px rgba(124,58,237,0.25);
}
.player-symbol { font-size: 1.6rem; font-weight: 900; }
.x-symbol { color: var(--x-color); text-shadow: 0 0 16px rgba(244,63,94,0.6); }
.o-symbol { color: var(--o-color); text-shadow: 0 0 16px rgba(6,182,212,0.6); }
.player-name { font-size: 0.8rem; font-weight: 600; color: var(--muted); }
.player-score { font-family: 'Orbitron', monospace; font-size: 1.4rem; font-weight: 700; color: var(--text); }
.vs-badge {
  font-family: 'Orbitron', monospace;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--muted);
  flex-shrink: 0;
}

/* ===== STATUS BAR ===== */
.status-bar {
  text-align: center;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary-glow);
  background: rgba(124,58,237,0.08);
  border: 1px solid rgba(124,58,237,0.15);
  border-radius: 10px;
  padding: 10px;
}

/* ===== BOARD ===== */
.board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  padding: 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  backdrop-filter: blur(20px);
}

.cell {
  aspect-ratio: 1;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: 900;
  cursor: pointer;
  transition: all 0.15s ease;
  position: relative;
  overflow: hidden;
}
.cell:hover:not(.taken) {
  background: rgba(124,58,237,0.1);
  border-color: rgba(124,58,237,0.4);
  transform: scale(1.03);
}
.cell.taken { cursor: not-allowed; }
.cell.x-mark {
  color: var(--x-color);
  text-shadow: 0 0 20px rgba(244,63,94,0.7);
  border-color: rgba(244,63,94,0.25);
  background: rgba(244,63,94,0.05);
  animation: popIn 0.25s cubic-bezier(0.175,0.885,0.32,1.275);
}
.cell.o-mark {
  color: var(--o-color);
  text-shadow: 0 0 20px rgba(6,182,212,0.7);
  border-color: rgba(6,182,212,0.25);
  background: rgba(6,182,212,0.05);
  animation: popIn 0.25s cubic-bezier(0.175,0.885,0.32,1.275);
}
.cell.winning {
  animation: winPulse 0.6s ease infinite alternate;
  border-width: 2px;
}
.cell.x-mark.winning { border-color: var(--x-color); box-shadow: 0 0 20px rgba(244,63,94,0.4); }
.cell.o-mark.winning { border-color: var(--o-color); box-shadow: 0 0 20px rgba(6,182,212,0.4); }

@keyframes popIn { from { transform:scale(0.5); opacity:0; } to { transform:scale(1); opacity:1; } }
@keyframes winPulse { from { transform:scale(1); } to { transform:scale(1.06); } }

/* ===== OVERLAY ===== */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(5,5,20,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
  backdrop-filter: blur(8px);
  animation: fadeIn 0.3s ease;
}
.overlay-card {
  background: rgba(15,15,35,0.95);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 40px 32px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 340px;
  width: 100%;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.result-emoji { font-size: 3.5rem; }
.result-title {
  font-family: 'Orbitron', monospace;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
}
.result-sub { color: var(--muted); font-size: 0.95rem; }
.rematch-status { color: var(--muted); font-size: 0.85rem; animation: pulse 2s infinite; }

/* ===== UTILS ===== */
.hidden { display: none !important; }

/* ===== RESPONSIVE ===== */
@media (max-width: 380px) {
  .cell { font-size: 2rem; }
  .player-score { font-size: 1.2rem; }
}