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

:root {
  --bg:       #0a0f1a;
  --surface:  #111827;
  --surface2: #1f2937;
  --border:   #374151;
  --accent:   #10b981;
  --accent2:  #059669;
  --danger:   #ef4444;
  --warning:  #f59e0b;
  --text:     #f9fafb;
  --text2:    #9ca3af;
  --gold:     #fbbf24;
  --radius:   10px;
  --font:     'Segoe UI', system-ui, sans-serif;
}

html, body {
  width: 100%; height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  overflow: hidden;
  user-select: none;
}

/* ─── Screens ──────────────────────────────────────────────────── */
.screen { display: none; width: 100%; height: 100%; position: absolute; inset: 0; }
.screen.active { display: flex; flex-direction: column; align-items: center; justify-content: center; }

/* ─── Canvas ───────────────────────────────────────────────────── */
#game-canvas-wrapper {
  position: absolute; inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: #070d14;
}
#game-canvas-wrapper.active { display: flex; }

canvas { display: block; }

/* ─── Glass card ───────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  width: min(90vw, 420px);
  backdrop-filter: blur(10px);
}

.card h2 { font-size: 1.4rem; margin-bottom: 1.5rem; text-align: center; letter-spacing: .05em; }

/* ─── Buttons ──────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: .5rem; padding: .65rem 1.4rem; border-radius: 8px; border: none;
  font-size: .95rem; font-weight: 600; cursor: pointer; transition: all .15s;
  width: 100%; margin-top: .6rem;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent2); transform: translateY(-1px); }
.btn-secondary { background: var(--surface2); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: .85; }
.btn-gold { background: var(--gold); color: #000; }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.btn-sm { padding: .35rem .8rem; font-size: .82rem; width: auto; margin-top: 0; }

/* ─── Inputs ───────────────────────────────────────────────────── */
.input-group { margin-bottom: .9rem; }
.input-group label { display: block; font-size: .82rem; color: var(--text2); margin-bottom: .3rem; }
.input-group input, .input-group select {
  width: 100%; padding: .6rem .9rem; background: var(--surface2);
  border: 1px solid var(--border); border-radius: 8px; color: var(--text);
  font-size: .95rem; outline: none; transition: border-color .15s;
}
.input-group input:focus, .input-group select:focus { border-color: var(--accent); }
.input-group select option { background: var(--surface2); }

/* ─── Logo ─────────────────────────────────────────────────────── */
.logo {
  font-size: 2.8rem; font-weight: 900; letter-spacing: -.03em;
  background: linear-gradient(135deg, var(--accent), var(--gold));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  margin-bottom: .3rem;
}
.logo-sub { font-size: .9rem; color: var(--text2); margin-bottom: 2.5rem; letter-spacing: .1em; text-transform: uppercase; }

/* ─── Tabs ─────────────────────────────────────────────────────── */
.tabs { display: flex; border-bottom: 1px solid var(--border); margin-bottom: 1.5rem; }
.tab { flex: 1; padding: .6rem; text-align: center; cursor: pointer; font-size: .9rem; color: var(--text2); transition: all .15s; }
.tab.active { color: var(--accent); border-bottom: 2px solid var(--accent); margin-bottom: -1px; }

/* ─── HUD ──────────────────────────────────────────────────────── */
#hud {
  position: absolute; top: 0; left: 0; right: 0;
  display: none; flex-direction: column; pointer-events: none; z-index: 10;
}
#hud.visible { display: flex; }

#hud-top {
  display: flex; align-items: stretch; justify-content: space-between;
  background: linear-gradient(180deg, rgba(0,0,0,.85) 0%, transparent 100%);
  padding: .5rem 1rem; gap: .5rem;
}

.player-card {
  display: flex; align-items: center; gap: .5rem;
  background: rgba(255,255,255,.06); border-radius: 8px;
  padding: .4rem .8rem; min-width: 130px; border: 1px solid transparent;
  transition: all .3s;
}
.player-card.active { border-color: var(--accent); background: rgba(16,185,129,.12); box-shadow: 0 0 12px rgba(16,185,129,.25); }
.player-card.eliminated { opacity: .4; filter: grayscale(1); }
.player-card .ball-dot { width: 14px; height: 14px; border-radius: 50%; flex-shrink: 0; }
.player-card .p-name { font-size: .82rem; font-weight: 600; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.player-card .p-elo { font-size: .72rem; color: var(--text2); }
.player-card .p-balls { font-size: .75rem; color: var(--text2); white-space: nowrap; }

#hud-center { display: flex; justify-content: center; padding: .3rem; pointer-events: none; }

#turn-timer {
  background: rgba(0,0,0,.7); border: 2px solid var(--accent);
  border-radius: 24px; padding: .3rem 1.2rem; font-size: 1.1rem; font-weight: 700;
  display: none;
}
#turn-timer.warning { border-color: var(--danger); color: var(--danger); animation: pulse 1s infinite; }

#power-bar-wrapper {
  position: absolute; bottom: 1.2rem; right: 1.2rem;
  display: none; flex-direction: column; align-items: center; gap: .4rem;
  pointer-events: none;
}
#power-bar-wrapper.visible { display: flex; }
#power-label { font-size: .75rem; color: var(--text2); }
#power-bar-bg {
  width: 14px; height: 120px; background: rgba(255,255,255,.1); border-radius: 7px;
  border: 1px solid var(--border); overflow: hidden; position: relative;
}
#power-bar-fill {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: linear-gradient(0deg, var(--danger), var(--warning), var(--accent));
  border-radius: 7px; transition: height .05s;
}

/* ─── Chat ─────────────────────────────────────────────────────── */
#chat-panel {
  position: absolute; bottom: 1rem; left: 1rem; width: 240px;
  display: none; flex-direction: column; gap: .3rem; z-index: 20;
}
#chat-panel.visible { display: flex; }
#chat-messages {
  max-height: 140px; overflow-y: auto; display: flex; flex-direction: column; gap: .15rem;
}
.chat-msg { font-size: .75rem; padding: .2rem .5rem; background: rgba(0,0,0,.6); border-radius: 6px; word-break: break-word; }
.chat-msg .chat-name { color: var(--accent); font-weight: 600; }
#chat-input-row { display: flex; gap: .3rem; }
#chat-input {
  flex: 1; background: rgba(255,255,255,.08); border: 1px solid var(--border);
  border-radius: 6px; color: var(--text); font-size: .8rem; padding: .3rem .6rem;
  outline: none; pointer-events: all;
}
#chat-send { pointer-events: all; }

/* ─── Notifications ────────────────────────────────────────────── */
#notifications {
  position: absolute; top: 80px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: .4rem;
  pointer-events: none; z-index: 50;
}
.notif {
  background: rgba(0,0,0,.85); border: 1px solid var(--border);
  border-radius: 20px; padding: .4rem 1.2rem; font-size: .9rem;
  animation: notif-in .3s ease, notif-out .4s ease 2.5s forwards;
  white-space: nowrap;
}
.notif.foul { border-color: var(--danger); color: var(--danger); }
.notif.good { border-color: var(--accent); color: var(--accent); }

/* ─── Lobby ────────────────────────────────────────────────────── */
#lobby-screen { align-items: stretch; padding: 1rem; gap: 1rem; overflow-y: auto; }
#lobby-content { display: flex; flex-direction: column; gap: 1rem; max-width: 640px; margin: 0 auto; width: 100%; }
#lobby-header { display: flex; align-items: center; gap: 1rem; }
#lobby-title { font-size: 1.5rem; font-weight: 700; flex: 1; }
#share-link { font-size: .75rem; color: var(--accent); cursor: pointer; }
#share-link:hover { text-decoration: underline; }

#player-list { display: flex; flex-direction: column; gap: .5rem; }
.lobby-player { display: flex; align-items: center; gap: .7rem; padding: .6rem .8rem; background: var(--surface2); border-radius: 8px; border: 1px solid var(--border); }
.lobby-player .lp-name { flex: 1; font-weight: 600; }
.lobby-player .lp-elo { color: var(--text2); font-size: .85rem; }
.lobby-player .lp-ready { color: var(--accent); font-size: .8rem; }

#settings-panel { display: grid; grid-template-columns: 1fr 1fr; gap: .7rem; }

/* ─── Tournament UI ────────────────────────────────────────────── */
#tournament-screen { padding: 1rem; overflow-y: auto; }
#bracket-wrapper { width: 100%; overflow-x: auto; }
#bracket { display: flex; gap: 2rem; padding: 1rem; min-height: 300px; }
.bracket-round { display: flex; flex-direction: column; justify-content: space-around; gap: 1rem; min-width: 160px; }
.bracket-round-title { font-size: .75rem; color: var(--text2); text-align: center; margin-bottom: .5rem; text-transform: uppercase; letter-spacing: .08em; }
.bracket-match {
  background: var(--surface2); border: 1px solid var(--border); border-radius: 8px;
  overflow: hidden; position: relative;
}
.bracket-match.active { border-color: var(--accent); }
.bracket-match.completed { opacity: .8; }
.bracket-player { display: flex; align-items: center; gap: .5rem; padding: .4rem .6rem; font-size: .82rem; }
.bracket-player:first-child { border-bottom: 1px solid var(--border); }
.bracket-player.winner { color: var(--gold); font-weight: 700; }
.bracket-player .bp-elo { color: var(--text2); font-size: .72rem; margin-left: auto; }

/* ─── Game Over ────────────────────────────────────────────────── */
#game-over-overlay {
  position: absolute; inset: 0; background: rgba(0,0,0,.8);
  display: none; flex-direction: column; align-items: center; justify-content: center;
  z-index: 100; backdrop-filter: blur(4px);
}
#game-over-overlay.visible { display: flex; }
#game-over-card { text-align: center; }
#game-over-title { font-size: 2.5rem; font-weight: 900; color: var(--gold); margin-bottom: .5rem; }
#game-over-winner { font-size: 1.2rem; color: var(--text2); margin-bottom: 1.5rem; }
#elo-changes { display: flex; gap: 1rem; justify-content: center; margin-bottom: 1.5rem; flex-wrap: wrap; }
.elo-chip { background: var(--surface2); border-radius: 8px; padding: .3rem .8rem; font-size: .85rem; }
.elo-chip .elo-val { font-weight: 700; }
.elo-chip .elo-val.pos { color: var(--accent); }
.elo-chip .elo-val.neg { color: var(--danger); }
#game-over-btns { display: flex; gap: .7rem; }
#game-over-btns .btn { width: auto; }

/* ─── Skin selector ────────────────────────────────────────────── */
.skin-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: .4rem; margin-top: .4rem; }
.skin-item { aspect-ratio: 1; border-radius: 6px; cursor: pointer; border: 2px solid transparent; overflow: hidden; transition: border-color .15s; }
.skin-item.selected { border-color: var(--accent); }
.skin-item img { width: 100%; height: 100%; object-fit: cover; }

/* ─── Scrollbar ────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ─── Animations ───────────────────────────────────────────────── */
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .5; } }
@keyframes notif-in { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: none; } }
@keyframes notif-out { to { opacity: 0; transform: translateY(-8px); } }
@keyframes spin { to { transform: rotate(360deg); } }

.spinner { width: 32px; height: 32px; border: 3px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin .7s linear infinite; }

/* ─── Responsive ───────────────────────────────────────────────── */
@media (max-width: 600px) {
  .card { padding: 1.4rem; }
  #hud-top { flex-wrap: wrap; }
  .player-card { min-width: 100px; }
  #settings-panel { grid-template-columns: 1fr; }
}