/* ════════════════════════════════════════
   CHESS — Chess.com-style dark UI
   Updated: bigger board, centered, fullscreen, auto-flip button
   ════════════════════════════════════════ */

:root {
  --bg:        #161512;
  --panel:     #1e1c19;
  --panel2:    #272420;
  --border:    #3a3835;
  --green:     #81b64c;
  --green-d:   #538a30;
  --gold:      #f4c143;
  --red:       #c93636;
  --blue:      #4f85c9;
  --tx:        #e8e4dc;
  --txd:       #8a8278;
  --txdd:      #4a4540;
  --r:         8px;
  --r-sm:      5px;
  --sq-l: #eeeed2;
  --sq-d: #769656;
}

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

html, body {
  height: 100%;
}

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

/* ── OVERLAY SCREENS ── */
.overlay-screen {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.82);
  display: flex; align-items: center; justify-content: center;
  z-index: 999;
  backdrop-filter: blur(4px);
}

/* ── SETUP CARD ── */
.setup-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px 28px;
  width: min(560px, 96vw);
  max-height: 92vh;
  overflow-y: auto;
}

.setup-logo {
  font-family: 'Noto Serif', serif;
  font-size: 26px;
  color: var(--green);
  text-align: center;
  margin-bottom: 6px;
  letter-spacing: -.5px;
}

.setup-heading {
  text-align: center;
  font-size: 15px;
  color: var(--txd);
  font-weight: 500;
  margin-bottom: 20px;
}

/* Tabs */
.tc-tabs {
  display: flex;
  gap: 4px;
  background: var(--panel2);
  border-radius: var(--r);
  padding: 4px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.tc-tab {
  flex: 1;
  min-width: 72px;
  padding: 8px 4px;
  font-size: 12px;
  font-weight: 600;
  border: none;
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--txd);
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}
.tc-tab:hover { color: var(--tx); }
.tc-tab.active {
  background: var(--panel);
  color: var(--tx);
  box-shadow: 0 1px 4px rgba(0,0,0,.4);
}

/* TC option grid */
.tc-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 16px;
}

.tc-opt {
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 10px 8px;
  text-align: center;
  cursor: pointer;
  transition: all .15s;
}
.tc-opt:hover { border-color: var(--green); }
.tc-opt.selected { border-color: var(--green); background: rgba(129,182,76,.12); }

.tc-opt-main {
  font-family: 'Noto Serif', serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--tx);
  line-height: 1;
  margin-bottom: 3px;
}

.tc-opt-label {
  font-size: 10px;
  color: var(--txd);
  text-transform: uppercase;
  letter-spacing: .6px;
}

/* Custom time control */
.custom-tc {
  display: none;
  margin-bottom: 16px;
}

/* Asymmetric toggle header */
.asym-toggle-row {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 10px 14px;
  margin-bottom: 10px;
  cursor: pointer;
}
.asym-toggle-row label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 13px;
  color: var(--tx);
  font-weight: 500;
  user-select: none;
}
.asym-toggle-row input[type="checkbox"] {
  width: 16px; height: 16px;
  accent-color: var(--green);
  cursor: pointer;
}

.custom-fields {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  background: var(--panel2);
  border-radius: var(--r);
  padding: 14px;
}

/* Asymmetric fields */
#asym-fields {
  background: var(--panel2);
  border-radius: var(--r);
  padding: 14px;
}
.asym-players {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}
.asym-player {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.asym-player-header {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--txd);
  font-weight: 600;
  margin-bottom: 2px;
}
.asym-divider {
  width: 1px;
  background: var(--border);
  align-self: stretch;
  margin: 0 4px;
}

.cf-group { flex: 1; }
.cf-group label { display: block; font-size: 11px; color: var(--txd); margin-bottom: 6px; }
.cf-group input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--tx);
  padding: 8px 10px;
  font-size: 16px;
  font-family: 'Noto Serif', serif;
  font-weight: 700;
  text-align: center;
  outline: none;
}
.cf-group input:focus { border-color: var(--green); }
.cf-plus { font-size: 20px; color: var(--txd); padding-bottom: 4px; }

.asym-inc-row {
  display: flex;
  align-items: flex-end;
  gap: 10px;
}
.asym-inc-label {
  font-size: 11px;
  color: var(--txd);
  padding-bottom: 10px;
  white-space: nowrap;
}

/* Player names */
.setup-names {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}
.sn-field { flex: 1; display: flex; align-items: center; gap: 8px; }
.sn-icon {
  width: 32px; height: 32px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; flex-shrink: 0;
}
.white-av { background: #e8e4dc; color: #111; }
.black-av { background: #1e1c19; border: 1px solid var(--border); color: var(--tx); }
.sn-input, .sn-vs {
  width: 100%;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--tx);
  padding: 9px 11px;
  font-size: 13px;
  outline: none;
}
.sn-input:focus { border-color: var(--green); }
.sn-vs {
  flex-shrink: 0; width: auto; padding: 9px 6px;
  color: var(--txd); font-size: 12px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 1px;
  border: none; background: transparent;
}

.start-btn {
  width: 100%;
  background: var(--green);
  border: none;
  border-radius: var(--r);
  color: #111;
  font-size: 16px;
  font-weight: 700;
  padding: 14px;
  cursor: pointer;
  transition: all .15s;
}
.start-btn:hover { background: var(--green-d); color: #fff; }

/* ── PROMOTION ── */
.promo-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 20px;
  text-align: center;
}
.promo-heading { font-size: 14px; color: var(--txd); margin-bottom: 14px; }
.promo-grid { display: flex; gap: 10px; }
.promo-piece {
  width: 68px; height: 68px;
  border: 2px solid var(--border);
  border-radius: var(--r);
  background: var(--panel2);
  cursor: pointer;
  overflow: hidden;
  transition: all .15s;
}
.promo-piece:hover { border-color: var(--green); transform: scale(1.08); }
.promo-piece img { width: 100%; height: 100%; object-fit: contain; padding: 6px; }

/* ── RESULT ── */
.result-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px 32px;
  text-align: center;
  width: min(380px, 90vw);
}
.result-emblem { font-size: 48px; margin-bottom: 10px; }
.result-title  { font-family: 'Noto Serif', serif; font-size: 28px; font-weight: 700; color: var(--gold); margin-bottom: 6px; }
.result-reason { font-size: 14px; color: var(--txd); margin-bottom: 18px; }
.result-names  { display: flex; align-items: center; justify-content: center; gap: 10px; font-size: 14px; color: var(--txd); margin-bottom: 22px; }
.result-names span:not(.result-vs) { color: var(--tx); font-weight: 600; }
.result-vs { font-size: 11px; text-transform: uppercase; letter-spacing: 1px; }
.result-actions { display: flex; gap: 10px; justify-content: center; }
.ra-btn {
  flex: 1; max-width: 140px;
  padding: 11px;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: var(--panel2);
  color: var(--tx);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
}
.ra-btn:hover { background: var(--panel); border-color: var(--tx); }
.ra-btn.ra-rematch { background: var(--green); border-color: var(--green); color: #111; }
.ra-btn.ra-rematch:hover { background: var(--green-d); color: #fff; }

/* ════════════════════════════
   GAME APP — Centered layout
   ════════════════════════════ */
.game-app {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 12px;
  width: 100%;
  min-height: 100vh;
}

/* ── BOARD COLUMN — bigger, takes more vertical space ── */
.board-col {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  /* Fill viewport height minus player strips and padding */
  width: min(
    calc(100vh - 140px),
    calc(100vw - 330px),
    720px
  );
}

/* Player strip */
.player-strip {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 8px 12px;
  min-height: 52px;
}
.player-strip.active-strip { border-color: var(--green); }

.ps-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; flex-shrink: 0;
}
.ps-info  { flex: 1; min-width: 0; }
.ps-name  { font-weight: 600; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ps-captured { font-size: 11px; color: var(--txd); min-height: 14px; }

.ps-clock {
  min-width: 96px;
  text-align: right;
  font-family: 'Noto Serif', serif;
  font-size: 24px;
  font-weight: 700;
  color: var(--txd);
  transition: color .3s;
}
.ps-clock.active { color: var(--tx); }
.ps-clock.low-time { color: #e05252 !important; animation: tick-pulse .5s infinite alternate; }

@keyframes tick-pulse { from { opacity: .7 } to { opacity: 1 } }

/* Board row */
.board-row {
  display: flex;
  align-items: stretch;
  gap: 6px;
}

/* Eval bar removed */

/* Board element */
.board-el {
  width: 100% !important;
  touch-action: none;
}

/* ── CHESSBOARD SQUARE COLORS ── */
.board-el.theme-green   .white-1e1d7 { background-color: #eeeed2 !important; }
.board-el.theme-green   .black-3c85d { background-color: #769656 !important; }
.board-el.theme-classic .white-1e1d7 { background-color: #edd6af !important; }
.board-el.theme-classic .black-3c85d { background-color: #b88761 !important; }
.board-el.theme-ocean   .white-1e1d7 { background-color: #dee3e6 !important; }
.board-el.theme-ocean   .black-3c85d { background-color: #8ca2ad !important; }
.board-el.theme-walnut  .white-1e1d7 { background-color: #f0cfa0 !important; }
.board-el.theme-walnut  .black-3c85d { background-color: #7d4f2a !important; }
.board-el.theme-midnight .white-1e1d7 { background-color: #b4c7d9 !important; }
.board-el.theme-midnight .black-3c85d { background-color: #3b5b87 !important; }
.board-el.theme-ruby    .white-1e1d7 { background-color: #f3d5d5 !important; }
.board-el.theme-ruby    .black-3c85d { background-color: #b83232 !important; }

/* Last move highlight */
.square-55d63 { position: relative; }
.sq-last      { background-color: rgba(244,193,67,.44) !important; }

/* Selected square */
.sq-selected { background-color: rgba(20,180,80,.55) !important; }

/* Legal move dot */
.sq-dot::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%,-50%);
  width: 28%;
  height: 28%;
  border-radius: 50%;
  background: rgba(0,0,0,.25);
  pointer-events: none;
  z-index: 5;
}

/* Legal capture ring */
.sq-capture::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle, transparent 58%, rgba(0,0,0,.22) 60%);
  pointer-events: none;
  z-index: 5;
}

/* Check highlight */
.sq-check { background: radial-gradient(circle, #e74c3c 0%, rgba(231,76,60,0) 70%) !important; }

/* Pieces */
.piece-417db {
  pointer-events: none;
  cursor: grab;
  transition: transform 0.25s ease;
}

/* Piece-flip mode: rotate all pieces 180° (black's perspective) */
#board.pieces-flipped .piece-417db {
  transform: rotate(180deg);
}

/* ── SIDEBAR ── */
.sidebar {
  flex: 1;
  min-width: 0;
  max-width: 300px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  /* Keep sidebar in sync with board height */
  align-self: stretch;
}

.sb-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 8px 12px;
}

.game-badge {
  font-size: 12px;
  font-weight: 700;
  color: var(--txd);
  letter-spacing: .3px;
}

.sb-icons { display: flex; gap: 4px; flex-wrap: wrap; }

.icon-btn {
  width: 30px; height: 30px;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  background: var(--panel2);
  color: var(--txd);
  font-size: 14px;
  cursor: pointer;
  transition: all .15s;
  display: flex; align-items: center; justify-content: center;
}
.icon-btn:hover { background: var(--border); color: var(--tx); }

/* Active state for auto-flip button */
.icon-btn-active {
  background: rgba(129,182,76,.18) !important;
  border-color: var(--green) !important;
  color: var(--green) !important;
}

/* Theme swatches */
.theme-row {
  display: flex;
  gap: 6px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 10px 12px;
  flex-wrap: wrap;
}
.th-swatch {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 2px solid transparent;
  background: linear-gradient(135deg, var(--a) 50%, var(--b) 50%);
  cursor: pointer;
  transition: all .15s;
}
.th-swatch:hover, .th-swatch.active { border-color: var(--tx); transform: scale(1.1); }

/* Status bar */
.sb-status {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 9px 12px;
  font-size: 13px;
  font-weight: 500;
}
.ss-dot {
  width: 9px; height: 9px; border-radius: 50%; flex-shrink: 0;
}
.white-dot { background: #e8e4dc; }
.black-dot { background: #2a2825; border: 1.5px solid #888; }

/* Move list */
.move-scroll {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 6px;
  flex: 1;
  overflow-y: auto;
  min-height: 80px;
}

.move-grid {
  display: grid;
  grid-template-columns: 28px 1fr 1fr;
  gap: 1px;
}

.mg-num {
  color: var(--txdd);
  font-size: 11px;
  font-family: 'Noto Serif', serif;
  padding: 5px 4px;
  align-self: center;
  text-align: right;
}

.mg-move {
  padding: 5px 8px;
  border-radius: var(--r-sm);
  font-size: 13px;
  font-family: 'Noto Serif', serif;
  cursor: pointer;
  color: var(--tx);
  transition: background .1s;
  white-space: nowrap;
}
.mg-move:hover  { background: var(--panel2); }
.mg-move.active { background: var(--panel2); outline: 1px solid var(--border); }

/* Nav row */
.nav-row {
  display: flex;
  gap: 6px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 7px 10px;
}
.nav-btn {
  flex: 1;
  padding: 7px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--panel2);
  color: var(--tx);
  font-size: 13px;
  cursor: pointer;
  transition: all .15s;
}
.nav-btn:hover { background: var(--border); }

/* Game controls */
.game-ctrl-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.gc-btn {
  flex: 1;
  min-width: 70px;
  padding: 9px 6px;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: var(--panel2);
  color: var(--tx);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}
.gc-btn:hover             { background: var(--border); }
.gc-btn.danger            { border-color: rgba(201,54,54,.4); color: #e05252; }
.gc-btn.danger:hover      { background: rgba(201,54,54,.15); }
.gc-btn.warn              { border-color: rgba(244,193,67,.3); color: var(--gold); }
.gc-btn.warn:hover        { background: rgba(244,193,67,.1); }
.gc-btn.primary           { background: var(--green); border-color: var(--green); color: #111; }
.gc-btn.primary:hover     { background: var(--green-d); color: #fff; }

/* Extra row */
.extra-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.ex-btn {
  flex: 1;
  min-width: 60px;
  padding: 7px 6px;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: var(--panel);
  color: var(--txd);
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
  text-align: center;
}
.ex-btn:hover { color: var(--tx); border-color: var(--txdd); }

/* ── MODALS ── */
.modal {
  display: none;
  position: fixed; inset: 0;
  z-index: 800;
  background: rgba(0,0,0,.7);
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(3px);
}
.modal.show { display: flex; }

.mc {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 28px 24px;
  width: min(440px, 92vw);
  max-height: 80vh;
  overflow-y: auto;
}
.mc.wide { width: min(580px, 92vw); }
.mc h3   { font-size: 16px; font-weight: 700; margin-bottom: 14px; }

.mc-close {
  position: absolute; top: 14px; right: 16px;
  font-size: 18px; color: var(--txd); cursor: pointer;
}
.mc-close:hover { color: var(--tx); }

.mc-area {
  width: 100%;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--tx);
  font-family: 'Noto Serif', serif;
  font-size: 12px;
  padding: 10px;
  resize: vertical;
  outline: none;
  margin-bottom: 2px;
}
.mc-area:focus { border-color: var(--green); }

.mc-inp {
  width: 100%;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--tx);
  font-size: 13px;
  padding: 10px 12px;
  outline: none;
  margin-bottom: 12px;
}
.mc-inp:focus { border-color: var(--green); }

.mc-row { display: flex; gap: 8px; margin-top: 10px; }

.mc-btn {
  padding: 10px 18px;
  background: var(--green);
  border: none;
  border-radius: var(--r-sm);
  color: #111;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: all .15s;
}
.mc-btn:hover { background: var(--green-d); color: #fff; }
.mc-btn.secondary { background: var(--panel2); border: 1px solid var(--border); color: var(--txd); }
.mc-btn.secondary:hover { color: var(--tx); border-color: var(--txdd); }

/* Library */
.lib-list { display: flex; flex-direction: column; gap: 8px; }
.lib-item {
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 10px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.lib-item-name { font-weight: 600; font-size: 13px; margin-bottom: 2px; }
.lib-item-meta { font-size: 11px; color: var(--txd); }
.lib-item-btns { display: flex; gap: 6px; flex-shrink: 0; }
.lib-item-btns button {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--panel);
  color: var(--txd);
  font-size: 11px;
  cursor: pointer;
  transition: all .15s;
}
.lib-item-btns button:hover { color: var(--tx); }
.lib-item-btns button.del { color: #e05252; border-color: rgba(201,54,54,.3); }
.lib-item-btns button.del:hover { background: rgba(201,54,54,.1); }

/* Scrollbars */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: var(--txdd); }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .game-app {
    flex-direction: column;
    align-items: center;
    padding: 8px;
    gap: 8px;
    min-height: unset;
  }
  .board-col {
    width: min(100vw - 16px, 100vh - 220px, 580px);
  }
  .sidebar {
    width: 100%;
    max-width: 100%;
    align-self: auto;
  }
  .move-scroll { max-height: 160px; }
}

@media (max-width: 480px) {
  .setup-card   { padding: 20px 16px; }
  .tc-tab       { font-size: 10px; padding: 7px 3px; }
  .ps-clock     { font-size: 18px; min-width: 72px; }
  .game-ctrl-row { flex-wrap: wrap; }
  .gc-btn       { font-size: 11px; padding: 8px 5px; }
  .board-col    { width: calc(100vw - 16px); }
}

/* Touch - prevent scroll on board */
#board { touch-action: none; }

/* ── FULLSCREEN adjustments ── */
:fullscreen .game-app,
:-webkit-full-screen .game-app,
:-moz-full-screen .game-app {
  min-height: 100vh;
  height: 100vh;
  padding: 8px;
}

:fullscreen .board-col,
:-webkit-full-screen .board-col,
:-moz-full-screen .board-col {
  width: min(calc(100vh - 130px), calc(100vw - 320px), 800px);
}