/* chess.css — ChessMaster Online */

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

:root {
  --bg:         #0f0f1a;
  --surface:    #16213e;
  --surface2:   #1a2850;
  --surface3:   #1e305f;
  --accent:     #e94560;
  --accent-h:   #c73652;
  --gold:       #f5c518;
  --text:       #eaeaea;
  --muted:      #8892b0;
  --border:     #2a3560;
  --success:    #2ecc71;
  --warning:    #f39c12;
  --danger:     #e74c3c;
  --info:       #3498db;

  --cell-light: #f0d9b5;
  --cell-dark:  #b58863;
  --cell-sel:   #f6f669;
  --cell-move:  rgba(0,0,0,0.22);
  --cell-lm:    #cdd26a;
  --cell-check: #e94560;
  --cell-cap:   rgba(204,34,34,0.5);

  --board-size: 480px;
  --cell-size:  60px;

  --font-body:  'DM Sans', system-ui, sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;

  --radius:  10px;
  --shadow:  0 8px 32px rgba(0,0,0,0.45);
  --trans:   0.15s ease;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Navbar ────────────────────────────────────────────────────────────── */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 60px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 200;
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

.nav-brand {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
.nav-brand:hover { text-decoration: none; color: var(--accent); }
.brand-icon { font-size: 26px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.nav-links a { color: var(--muted); font-size: 14px; transition: color var(--trans); }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-user { font-size: 13px; color: var(--muted); }

/* ── Main Content ──────────────────────────────────────────────────────── */
.main-content { flex: 1; padding: 24px; max-width: 1280px; margin: 0 auto; width: 100%; }

/* ── Footer ────────────────────────────────────────────────────────────── */
.footer { text-align: center; padding: 16px; color: var(--muted); font-size: 12px; border-top: 1px solid var(--border); }

/* ── Buttons ───────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 8px 18px; border-radius: var(--radius); font-size: 14px;
  font-family: var(--font-body); font-weight: 500; cursor: pointer;
  border: 1px solid transparent; transition: all var(--trans);
  text-decoration: none; white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary   { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-h); border-color: var(--accent-h); }
.btn-secondary { background: var(--surface3); color: var(--text); border-color: var(--border); }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }
.btn-outline   { background: transparent; color: var(--text); border-color: var(--border); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-danger    { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-danger:hover { background: #c0392b; }
.btn-lg  { padding: 12px 28px; font-size: 15px; }
.btn-xl  { padding: 14px 32px; font-size: 15px; border-radius: 12px; }
.btn-sm  { padding: 6px 14px; font-size: 13px; }
.btn-xs  { padding: 4px 10px; font-size: 12px; border-radius: 6px; }
.w100 { width: 100%; margin-top: 4px; }

/* ── Badges ────────────────────────────────────────────────────────────── */
.badge {
  display: inline-block; padding: 3px 10px; border-radius: 20px;
  font-size: 11px; font-weight: 600; letter-spacing: 0.5px;
}
.badge-success   { background: rgba(46,204,113,0.2); color: var(--success); }
.badge-warning   { background: rgba(243,156,18,0.2); color: var(--warning); }
.badge-secondary { background: var(--surface2); color: var(--muted); }
.badge-primary   { background: rgba(233,69,96,0.2); color: var(--accent); }
.badge-info      { background: rgba(52,152,219,0.2); color: var(--info); }

.status-waiting  { color: var(--warning); }
.status-playing  { color: var(--success); }
.status-finished { color: var(--muted); }

/* ── Alerts ────────────────────────────────────────────────────────────── */
.alert { padding: 12px 16px; border-radius: var(--radius); margin-bottom: 16px; font-size: 14px; }
.alert-danger  { background: rgba(231,76,60,0.15); border: 1px solid var(--danger); color: #f87171; }
.alert-success { background: rgba(46,204,113,0.15); border: 1px solid var(--success); color: #4ade80; }

/* ── Forms ─────────────────────────────────────────────────────────────── */
.form-page {
  max-width: 480px; margin: 40px auto;
}
.form-page h2 { font-family: var(--font-serif); font-size: 28px; margin-bottom: 8px; }
.form-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 28px; margin-top: 20px;
  display: flex; flex-direction: column; gap: 16px;
}
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 13px; color: var(--muted); font-weight: 500; }
.form-input, .form-select {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 14px; color: var(--text);
  font-family: var(--font-body); font-size: 14px; width: 100%;
  transition: border-color var(--trans);
}
.form-input:focus, .form-select:focus {
  outline: none; border-color: var(--accent);
}
.form-input::placeholder { color: var(--muted); }
.form-footer { font-size: 13px; color: var(--muted); text-align: center; }

/* ── Page Header ───────────────────────────────────────────────────────── */
.page-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 24px; flex-wrap: wrap; gap: 12px;
}
.page-header h2 { font-family: var(--font-serif); font-size: 26px; }

.empty-state { text-align: center; padding: 60px 20px; color: var(--muted); }
.empty-state p { margin-bottom: 16px; font-size: 16px; }

/* ── Hero ──────────────────────────────────────────────────────────────── */
.hero {
  display: flex; align-items: center; justify-content: center;
  gap: 48px; padding: 40px 0 48px; flex-wrap: wrap;
}
.hero-text h1 {
  font-family: var(--font-serif); font-size: 44px; font-weight: 700;
  line-height: 1.15; margin-bottom: 12px;
  background: linear-gradient(135deg, #e94560, #f5c518);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-text p { color: var(--muted); font-size: 16px; margin-bottom: 28px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; }

.hero-board { flex-shrink: 0; }
.mini-board { box-shadow: var(--shadow); border: 2px solid var(--border); border-radius: 4px; }
.mb-grid { display: grid; grid-template-columns: repeat(8,48px); grid-template-rows: repeat(8,48px); }
.mb-cell { width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; font-size: 26px; }
.mbl { background: var(--cell-light); }
.mbd { background: var(--cell-dark); }
.pw { color: #fff; text-shadow: 0 1px 3px rgba(0,0,0,0.8); }
.pb { color: #1a1a2e; text-shadow: 0 0 2px rgba(255,255,255,0.3); }

/* ── Features ──────────────────────────────────────────────────────────── */
.features {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px; margin-top: 16px;
}
.feature-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 22px 18px;
  transition: border-color var(--trans), transform var(--trans);
}
.feature-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.feature-icon { font-size: 28px; margin-bottom: 10px; }
.feature-card h3 { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.feature-card p { font-size: 13px; color: var(--muted); line-height: 1.5; }

/* ── Chess Board ───────────────────────────────────────────────────────── */
.board-wrap { display: flex; align-items: flex-start; }

.chess-board {
  display: grid;
  grid-template-columns: repeat(8, var(--cell-size));
  grid-template-rows: repeat(8, var(--cell-size));
  border: 2px solid #6b4e2a;
  box-shadow: var(--shadow);
  border-radius: 2px;
}
.board-cell {
  width: var(--cell-size); height: var(--cell-size);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; position: relative; user-select: none;
  transition: background 0.08s;
}
.cell-light { background: var(--cell-light); }
.cell-dark  { background: var(--cell-dark); }
.cell-selected  { background: var(--cell-sel) !important; }
.cell-lastmove  { background: var(--cell-lm) !important; }
.cell-check     { background: var(--cell-check) !important; }
.cell-move::after {
  content: ''; position: absolute;
  width: 22px; height: 22px; border-radius: 50%;
  background: rgba(0,0,0,0.22); pointer-events: none;
}
.cell-capture::after {
  content: ''; position: absolute; inset: 0;
  border: 5px solid rgba(180,0,0,0.4); pointer-events: none;
}

.piece { display: block; font-size: 40px; line-height: 1; }
.piece-white { color: #fff; text-shadow: 0 0 2px #000, 0 1px 4px rgba(0,0,0,0.8); }
.piece-black { color: #1a1a2e; text-shadow: 0 0 1px rgba(255,255,255,0.4); }

/* Coordinates */
.rank-labels { display: flex; flex-direction: column; }
.rank-labels span { height: var(--cell-size); width: 18px; line-height: var(--cell-size); text-align: right; font-size: 11px; color: var(--muted); padding-right: 4px; }
.file-labels { display: flex; margin-left: 18px; }
.file-labels span { width: var(--cell-size); text-align: center; font-size: 11px; color: var(--muted); padding-top: 4px; height: 18px; }

/* ── Status Bar ────────────────────────────────────────────────────────── */
.status-bar {
  text-align: center; padding: 10px; font-size: 15px; font-weight: 500;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); margin-bottom: 10px; min-height: 42px;
  letter-spacing: 0.3px;
}
.status-check    { background: rgba(233,69,96,0.15); border-color: var(--accent); color: var(--accent); }
.status-gameover { background: rgba(245,197,24,0.1); border-color: var(--gold); color: var(--gold); }

/* ── AI Indicator ──────────────────────────────────────────────────────── */
.ai-indicator {
  display: flex; align-items: center; gap: 6px; justify-content: center;
  font-size: 13px; color: var(--muted); margin-top: 8px; height: 20px;
}
.dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); animation: bounce 1s infinite; }
.dot:nth-child(2) { animation-delay: 0.2s; }
.dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes bounce { 0%,80%,100%{transform:scale(0)} 40%{transform:scale(1)} }

/* ── Game Layout ───────────────────────────────────────────────────────── */
.game-layout {
  display: flex; gap: 20px; align-items: flex-start;
  justify-content: center; flex-wrap: wrap;
}
.board-area { display: flex; flex-direction: column; align-items: center; }
.game-sidebar {
  width: 200px; display: flex; flex-direction: column; gap: 12px; flex-shrink: 0;
}
.sidebar-section {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px;
  display: flex; flex-direction: column; gap: 8px;
}
.sidebar-section h3 { font-size: 11px; text-transform: uppercase; letter-spacing: 1.5px; color: var(--muted); font-weight: 600; }

/* Captured pieces */
.captured-pieces { display: flex; flex-direction: column; gap: 6px; }
.cp-row { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.cp-label { font-size: 11px; color: var(--muted); min-width: 65px; }
.cp-pieces { display: flex; flex-wrap: wrap; gap: 2px; }

/* Move history */
.move-history {
  max-height: 200px; overflow-y: auto; font-family: monospace;
  font-size: 12px; display: flex; flex-direction: column; gap: 2px;
}
.move-pair { display: flex; gap: 6px; align-items: center; }
.move-num  { color: var(--muted); min-width: 24px; }
.move-alg  { color: var(--text); min-width: 48px; padding: 1px 4px; border-radius: 4px; }
.move-alg:last-child { color: var(--muted); }

/* Diff / side buttons */
.diff-select, .side-select { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 4px; align-items: center; }
.diff-select label, .side-select label { font-size: 12px; color: var(--muted); width: 100%; }

/* ── Modals ────────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.75);
  display: flex; align-items: center; justify-content: center; z-index: 500;
}
.modal-box {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 28px; text-align: center;
  box-shadow: var(--shadow); min-width: 280px;
}
.modal-box h2 { font-family: var(--font-serif); font-size: 28px; margin-bottom: 8px; }
.modal-box h3 { font-size: 18px; margin-bottom: 16px; }
.modal-box p  { color: var(--muted); margin-bottom: 8px; }

/* Promotion */
.promo-choices { display: flex; gap: 12px; justify-content: center; }
.promo-btn {
  font-size: 44px; background: none; border: 2px solid var(--border);
  border-radius: 10px; padding: 8px; cursor: pointer; transition: all var(--trans);
  width: 68px; height: 68px; display: flex; align-items: center; justify-content: center;
}
.promo-btn:hover { border-color: var(--accent); transform: scale(1.12); }

/* ── Rooms Grid ────────────────────────────────────────────────────────── */
.rooms-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px;
}
.room-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 18px;
  display: flex; flex-direction: column; gap: 10px;
  transition: border-color var(--trans), transform var(--trans);
}
.room-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.room-header { display: flex; align-items: center; gap: 8px; }
.room-code { font-family: monospace; font-size: 15px; font-weight: 700; color: var(--gold); }
.room-lock  { font-size: 14px; margin-left: auto; }
.room-name  { font-size: 14px; font-weight: 500; }
.room-code-display {
  font-family: monospace; font-size: 18px; font-weight: 700;
  color: var(--gold); background: rgba(245,197,24,0.1);
  padding: 2px 10px; border-radius: 6px;
}
.room-players { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); }
.room-meta    { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted); }
.room-actions { margin-top: 4px; }
.vs { font-size: 11px; color: var(--border); }

/* ── Room Play Layout ──────────────────────────────────────────────────── */
.room-layout { display: flex; flex-direction: column; gap: 12px; }
.room-header-bar {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 12px 18px; font-size: 14px; flex-wrap: wrap; gap: 8px;
}
.room-share { display: flex; align-items: center; gap: 8px; }
.room-body  { display: flex; gap: 20px; align-items: flex-start; flex-wrap: wrap; justify-content: center; }
.room-board-area { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.room-sidebar { width: 240px; display: flex; flex-direction: column; gap: 12px; flex-shrink: 0; }
.room-players-bar {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 10px 16px; font-size: 13px; width: 100%;
}
.rp-white { color: #fff; }
.rp-black { color: var(--muted); }
.rp-vs    { font-size: 11px; color: var(--border); }

/* Chat */
.chat-box {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); display: flex; flex-direction: column; overflow: hidden;
}
.chat-header { padding: 10px 14px; font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); border-bottom: 1px solid var(--border); }
.chat-messages { height: 220px; overflow-y: auto; padding: 10px; display: flex; flex-direction: column; gap: 8px; }
.chat-msg { font-size: 13px; }
.chat-sender { font-weight: 600; color: var(--accent); margin-right: 6px; }
.chat-time   { font-size: 11px; color: var(--muted); }
.chat-text   { color: var(--text); margin-top: 2px; word-break: break-word; }
.chat-input-row { display: flex; gap: 6px; padding: 8px; border-top: 1px solid var(--border); }
.chat-input-row .form-input { flex: 1; }

/* ── Setup Layout ──────────────────────────────────────────────────────── */
.setup-layout { display: flex; flex-direction: column; gap: 20px; }
.setup-header h2 { font-family: var(--font-serif); font-size: 26px; }
.setup-header p  { color: var(--muted); font-size: 14px; margin-top: 4px; }
.setup-body { display: flex; gap: 24px; flex-wrap: wrap; align-items: flex-start; }

.piece-palette {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 18px; width: 120px; flex-shrink: 0;
}
.piece-palette h3 { font-size: 12px; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); margin-bottom: 12px; }
.palette-section { display: flex; flex-wrap: wrap; gap: 4px; }
.palette-label { font-size: 11px; color: var(--muted); width: 100%; margin-top: 4px; }
.palette-piece {
  width: 44px; height: 44px; display: flex; align-items: center; justify-content: center;
  font-size: 30px; cursor: grab; border-radius: 8px; border: 1px solid transparent;
  transition: all var(--trans); background: var(--surface2);
}
.palette-piece:hover, .palette-piece.palette-selected {
  border-color: var(--accent); background: rgba(233,69,96,0.1);
}
.setup-board-area { display: flex; flex-direction: column; gap: 10px; }
.setup-turn { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--muted); }

.setup-actions {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 18px; width: 200px;
  display: flex; flex-direction: column; gap: 10px; flex-shrink: 0;
}
.setup-actions h3 { font-size: 12px; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); }
.setup-btns { display: flex; flex-direction: column; gap: 6px; }

/* ── Join Room: Side Picker ────────────────────────────────────────────── */
.side-choices { display: flex; gap: 16px; }
.side-card { cursor: pointer; }
.side-card input { display: none; }
.side-card-inner {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  background: var(--surface2); border: 2px solid var(--border);
  border-radius: 12px; padding: 18px 28px; transition: all var(--trans);
  font-size: 14px;
}
.side-card input:checked + .side-card-inner { border-color: var(--accent); background: rgba(233,69,96,0.1); }
.side-card-inner.taken { opacity: 0.45; cursor: not-allowed; }
.piece-big { font-size: 44px; }
.taken-label { font-size: 11px; color: var(--danger); }

/* ── Tables ────────────────────────────────────────────────────────────── */
.data-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.data-table th {
  text-align: left; padding: 10px 14px; background: var(--surface);
  border-bottom: 2px solid var(--border); color: var(--muted);
  font-size: 12px; text-transform: uppercase; letter-spacing: 1px;
}
.data-table td { padding: 10px 14px; border-bottom: 1px solid var(--border); }
.data-table tr:hover td { background: var(--surface); }
.data-table tr.highlight td { background: rgba(233,69,96,0.08); }
.text-success { color: var(--success); }
.text-danger  { color: var(--danger); }
.text-muted   { color: var(--muted); }

/* ── Tournaments ───────────────────────────────────────────────────────── */
.tournaments-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(220px,1fr)); gap: 16px; }
.tournament-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 18px; display: flex; flex-direction: column; gap: 10px;
  transition: border-color var(--trans);
}
.tournament-card:hover { border-color: var(--accent); }
.tc-header { display: flex; align-items: center; justify-content: space-between; }
.tc-name   { font-weight: 600; font-size: 15px; }
.tc-desc   { font-size: 13px; color: var(--muted); }
.tc-meta   { display: flex; gap: 8px; flex-wrap: wrap; font-size: 12px; color: var(--muted); }

.tournament-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 16px; flex-wrap: wrap; }
.round-section { margin-bottom: 16px; }
.round-section h4 { font-size: 13px; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); margin-bottom: 8px; }
.game-row {
  display: flex; align-items: center; gap: 10px; font-size: 13px;
  padding: 8px 12px; background: var(--surface); border-radius: 8px; margin-bottom: 6px;
}
.game-row .vs { color: var(--muted); font-size: 11px; }

/* ── Utility ───────────────────────────────────────────────────────────── */
.muted { color: var(--muted); }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--surface); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

/* ── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  :root { --cell-size: 46px; }
  .game-sidebar { width: 100%; flex-direction: row; flex-wrap: wrap; }
  .sidebar-section { flex: 1 1 160px; }
  .room-sidebar { width: 100%; }
  .tournament-layout { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  :root { --cell-size: 40px; }
  .hero-text h1 { font-size: 30px; }
  .hero { padding: 24px 0; gap: 24px; }
  .mb-grid { grid-template-columns: repeat(8, 36px); grid-template-rows: repeat(8, 36px); }
  .mb-cell { width: 36px; height: 36px; font-size: 20px; }
  .btn-xl { padding: 10px 18px; font-size: 13px; }
  .navbar { padding: 0 12px; }
  .main-content { padding: 12px; }
  .setup-body { flex-direction: column; }
  .piece-palette { width: 100%; }
  .setup-actions { width: 100%; }
}