/* ============================================================
   Gambit — štýly
   Tmavá, prémiová atmosféra: indigová tma + orech + zlato.
   Mobile-first, bez frameworkov.
   ============================================================ */

:root {
  /* paleta */
  --bg: hsl(228 18% 7%);
  --bg-soft: hsl(228 15% 10%);
  --panel: hsl(228 14% 12%);
  --panel-2: hsl(228 13% 15%);
  --border: hsl(228 12% 21%);
  --text: hsl(36 22% 90%);
  --muted: hsl(228 9% 62%);
  --gold: hsl(42 72% 58%);
  --gold-soft: hsl(42 72% 58% / .16);
  --danger: hsl(4 72% 55%);

  /* šachovnica */
  --sq-light: hsl(37 36% 73%);
  --sq-dark: hsl(23 26% 35%);
  --sq-sel: hsl(42 85% 55% / .45);
  --sq-last: hsl(48 85% 55% / .22);
  --sq-dot: hsl(228 30% 12% / .35);

  /* figúry */
  --piece-w-fill: hsl(40 42% 89%);
  --piece-w-line: hsl(26 32% 16%);
  --piece-b-fill: hsl(24 14% 15%);
  --piece-b-line: hsl(32 16% 46%);

  --shadow-lg: 0 12px 40px hsl(0 0% 0% / .35);
  --shadow-xl: 0 24px 80px hsl(0 0% 0% / .5);

  --font-display: Georgia, 'Times New Roman', 'Iowan Old Style', serif;
  --font-body: 'Avenir Next', 'Segoe UI', Inter, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font-body);
  font-weight: 300;
  color: var(--text);
  background:
    radial-gradient(60rem 40rem at 12% -10%, hsl(42 60% 40% / .09), transparent 60%),
    radial-gradient(50rem 36rem at 100% 110%, hsl(250 45% 35% / .12), transparent 60%),
    var(--bg);
  background-attachment: fixed;
  -webkit-tap-highlight-color: transparent;
}

/* jemné zrno cez celú stránku */
.grain {
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 1000;
  opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}
button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ============ hlavička ============ */

.site-header {
  padding: clamp(1.25rem, 4vw, 2.5rem) 1rem clamp(.75rem, 2vw, 1.25rem);
  text-align: center;
  animation: fadeDown .7s ease-out both;
}
.brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(.9rem, 3vw, 1.5rem);
}
.brand-rule {
  height: 1px;
  width: clamp(2.5rem, 9vw, 6rem);
  background: linear-gradient(90deg, transparent, var(--gold) 50%, transparent);
}
.brand-name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 6vw, 3.1rem);
  letter-spacing: .14em;
  text-transform: uppercase;
  line-height: 1;
  background: linear-gradient(175deg, hsl(42 65% 72%), hsl(38 55% 48%));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.brand-tag {
  margin: .5rem 0 0;
  font-size: .8rem;
  letter-spacing: .35em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ============ rozloženie ============ */

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
  max-width: 1160px;
  margin-inline: auto;
  padding: 0 clamp(.75rem, 3vw, 2rem) 2rem;
}
.board-zone {
  width: 100%;
  max-width: min(600px, 100%);
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: .7rem;
  animation: fadeUp .7s .12s ease-out both;
}
.panel {
  display: flex;
  flex-direction: column;
  gap: .9rem;
  max-width: min(600px, 100%);
  width: 100%;
  margin-inline: auto;
  animation: fadeUp .7s .24s ease-out both;
}

@media (min-width: 1000px) {
  .layout {
    grid-template-columns: minmax(0, 1fr) 350px;
    align-items: start;
    gap: 2rem;
  }
  .board-zone { max-width: min(620px, calc(100dvh - 15rem)); }
  .panel { position: sticky; top: 1rem; }
}

/* ============ karty hráčov ============ */

.player-card {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .55rem .8rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.avatar {
  width: 2.4rem;
  height: 2.4rem;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
}
.avatar svg { width: 78%; height: 78%; stroke-width: 4; stroke-linejoin: round; }
.avatar.w svg { fill: var(--piece-w-fill); stroke: var(--piece-w-line); --detail: var(--piece-w-line); }
.avatar.b svg { fill: var(--piece-b-fill); stroke: var(--piece-b-line); --detail: var(--piece-b-line); }

.pinfo { min-width: 0; }
.pname {
  font-weight: 500;
  font-size: .95rem;
  display: flex;
  align-items: center;
  gap: .45rem;
}
.psub { font-size: .78rem; color: var(--muted); letter-spacing: .04em; }

.turn-dot {
  width: .5rem; height: .5rem;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 8px var(--gold);
  opacity: 0;
  transition: opacity .3s;
}
.turn-dot.on { opacity: 1; animation: pulse 1.6s ease-in-out infinite; }

.captured {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: .1rem;
  flex-wrap: wrap;
  justify-content: flex-end;
  max-width: 55%;
}
.captured svg {
  width: 1.05rem; height: 1.05rem;
  stroke-width: 6; stroke-linejoin: round;
}
.captured svg.w { fill: var(--piece-w-fill); stroke: var(--piece-w-line); --detail: var(--piece-w-line); }
.captured svg.b { fill: var(--piece-b-fill); stroke: var(--piece-b-line); --detail: var(--piece-b-line); }
.cap-diff {
  font-size: .78rem;
  color: var(--gold);
  font-weight: 500;
  margin-left: .3rem;
}

/* ============ šachovnica ============ */

.board-frame {
  padding: clamp(7px, 1.4vw, 12px);
  border-radius: 14px;
  background: linear-gradient(160deg, hsl(228 14% 17%), hsl(228 16% 9%));
  border: 1px solid var(--border);
  box-shadow: var(--shadow-xl), inset 0 1px 0 hsl(0 0% 100% / .06);
}
.board {
  position: relative;
  aspect-ratio: 1;
  border-radius: 6px;
  overflow: hidden;
  touch-action: none;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  box-shadow: 0 0 0 1px hsl(23 26% 22%);
}
.squares {
  position: absolute; inset: 0;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  grid-template-rows: repeat(8, 1fr);
}
.sq { position: relative; }
.sq.light { background: var(--sq-light); }
.sq.dark { background: var(--sq-dark); }

.sq .coord {
  position: absolute;
  font-size: clamp(.5rem, 1.4vw, .68rem);
  font-weight: 500;
  letter-spacing: .02em;
  pointer-events: none;
  opacity: .85;
}
.sq .coord.file { right: 5%; bottom: 3%; }
.sq .coord.rank { left: 5%; top: 4%; }
.sq.light .coord { color: var(--sq-dark); }
.sq.dark .coord { color: var(--sq-light); }

/* zvýraznenia polí */
.sq.last::after {
  content: '';
  position: absolute; inset: 0;
  background: var(--sq-last);
}
.sq.sel::after {
  content: '';
  position: absolute; inset: 0;
  background: var(--sq-sel);
  box-shadow: inset 0 0 0 3px hsl(42 85% 60% / .8);
}
.sq.dot::before {
  content: '';
  position: absolute;
  left: 50%; top: 50%;
  width: 30%; height: 30%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: var(--sq-dot);
  z-index: 2;
}
.sq.cap::before {
  content: '';
  position: absolute; inset: 5%;
  border-radius: 50%;
  border: 4px solid var(--sq-dot);
  z-index: 2;
}
.sq.check::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 50%, hsl(4 75% 48% / .65), hsl(4 75% 48% / .1) 75%);
}
.sq.hint {
  box-shadow: inset 0 0 0 3px var(--gold);
  animation: hintPulse 1s ease-in-out infinite;
}

/* figúry */
.pieces {
  position: absolute; inset: 0;
  pointer-events: none;
  z-index: 3;
}
.piece {
  position: absolute;
  width: 12.5%;
  height: 12.5%;
  transform: translate(calc(var(--x) * 100%), calc(var(--y) * 100%));
  transition: transform .18s ease;
  will-change: transform;
}
.piece svg {
  width: 100%; height: 100%;
  display: block;
  padding: 4%;
  stroke-width: 4;
  stroke-linejoin: round;
  filter: drop-shadow(0 3px 4px hsl(0 0% 0% / .38));
}
.piece.w svg { fill: var(--piece-w-fill); stroke: var(--piece-w-line); --detail: var(--piece-w-line); }
.piece.b svg { fill: var(--piece-b-fill); stroke: var(--piece-b-line); --detail: var(--piece-b-line); }

.piece.dragging {
  transition: none;
  z-index: 10;
}
.piece.dragging svg {
  transform: scale(1.12);
  filter: drop-shadow(0 10px 14px hsl(0 0% 0% / .5));
}
.piece.enter svg { animation: pieceIn .45s ease-out both; }
.piece.out svg { animation: pieceOut .18s ease-in both; }

/* detaily figúr (oko koňa, zárez strelca) */
svg .pd { fill: var(--detail); stroke: none; }
svg .pl { stroke: var(--detail); }

/* ============ panel ============ */

.status-card {
  display: flex;
  align-items: center;
  gap: .65rem;
  padding: .85rem 1rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  min-height: 3.2rem;
}
.status-dot {
  width: .6rem; height: .6rem;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 10px var(--gold);
  transition: background .3s, box-shadow .3s;
}
.status-dot.thinking { animation: pulse 1s ease-in-out infinite; }
.status-dot.danger { background: var(--danger); box-shadow: 0 0 10px var(--danger); }
.status-text { font-size: .95rem; font-weight: 400; letter-spacing: .02em; }

.controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .55rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  min-height: 44px;
  padding: .6rem .9rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-weight: 400;
  font-size: .9rem;
  letter-spacing: .03em;
  transition: border-color .25s, background .25s, color .25s, transform .15s;
}
.btn:hover:not(:disabled) {
  border-color: hsl(42 72% 58% / .55);
  background: var(--panel-2);
}
.btn:active:not(:disabled) { transform: scale(.97); }
.btn:disabled { opacity: .38; cursor: default; }

.btn-primary {
  background: linear-gradient(170deg, hsl(42 75% 62%), hsl(39 65% 48%));
  border-color: transparent;
  color: hsl(30 40% 10%);
  font-weight: 600;
}
.btn-primary:hover:not(:disabled) {
  background: linear-gradient(170deg, hsl(42 80% 66%), hsl(39 70% 52%));
  border-color: transparent;
}
.btn-ghost { background: transparent; }
.btn-lg { min-height: 50px; font-size: 1rem; padding-inline: 1.6rem; }

.ic {
  width: 1.1rem; height: 1.1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: 0 0 auto;
}

/* zápis partie */
.moves-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.moves-title {
  margin: 0;
  padding: .7rem 1rem .55rem;
  font-family: var(--font-display);
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
}
.moves {
  display: grid;
  grid-template-columns: 2.6rem 1fr 1fr;
  align-content: start;
  min-height: 8rem;
  max-height: 15rem;
  overflow-y: auto;
  padding: .5rem .6rem .7rem;
  font-size: .92rem;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.moves::-webkit-scrollbar { width: 6px; }
.moves::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
.moves .num {
  color: var(--muted);
  font-size: .8rem;
  padding: .22rem .3rem;
}
.moves .ply {
  padding: .22rem .45rem;
  border-radius: 6px;
  font-weight: 400;
  letter-spacing: .02em;
}
.moves .ply.cur {
  background: var(--gold-soft);
  color: var(--gold);
  font-weight: 500;
}
.moves .empty-note {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: .85rem;
  padding: 1rem .4rem;
  text-align: center;
}

@media (min-width: 1000px) {
  .moves { max-height: clamp(12rem, 38dvh, 24rem); }
}

.site-footer {
  text-align: center;
  padding: 1.2rem 1rem 2rem;
  color: var(--muted);
  font-size: .75rem;
  letter-spacing: .18em;
  text-transform: uppercase;
}

/* ============ overlaye a modály ============ */

.overlay {
  position: fixed; inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: hsl(228 25% 4% / .72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  animation: fadeIn .25s ease-out both;
}
.overlay[hidden] { display: none; }

.modal {
  width: min(30rem, 100%);
  background: linear-gradient(165deg, hsl(228 14% 14%), hsl(228 16% 10%));
  border: 1px solid hsl(42 72% 58% / .22);
  border-radius: 18px;
  padding: clamp(1.4rem, 4vw, 2.1rem);
  box-shadow: var(--shadow-xl);
  animation: modalIn .35s cubic-bezier(.2, .9, .3, 1.2) both;
}
.modal-title {
  margin: 0 0 1.3rem;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-align: center;
}

.field { margin-bottom: 1.3rem; }
.field-label {
  display: block;
  font-size: .74rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: .55rem;
}

.seg {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .45rem;
}
.seg-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .3rem;
  padding: .65rem .3rem .55rem;
  min-height: 44px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  font-size: .85rem;
  color: var(--text);
  transition: border-color .25s, background .25s, box-shadow .25s;
}
.seg-btn:hover { border-color: hsl(42 72% 58% / .45); }
.seg-btn.on {
  border-color: var(--gold);
  background: var(--gold-soft);
  box-shadow: inset 0 0 0 1px var(--gold);
}
.mini-piece { width: 1.7rem; height: 1.7rem; display: block; }
.mini-piece svg { width: 100%; height: 100%; stroke-width: 4; stroke-linejoin: round; }
.mini-piece.w svg { fill: var(--piece-w-fill); stroke: var(--piece-w-line); --detail: var(--piece-w-line); }
.mini-piece.b svg { fill: var(--piece-b-fill); stroke: var(--piece-b-line); --detail: var(--piece-b-line); }
.mini-q {
  width: 1.7rem; height: 1.7rem;
  display: grid; place-items: center;
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 600;
  color: var(--gold);
  line-height: 1;
}

.levels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .45rem;
}
.level-btn {
  text-align: left;
  padding: .7rem .8rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  transition: border-color .25s, background .25s, box-shadow .25s;
}
.level-btn:hover { border-color: hsl(42 72% 58% / .45); }
.level-btn.on {
  border-color: var(--gold);
  background: var(--gold-soft);
  box-shadow: inset 0 0 0 1px var(--gold);
}
.level-name {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 500;
  font-size: .92rem;
  margin-bottom: .15rem;
}
.level-pips { display: inline-flex; gap: 3px; }
.level-pips i {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--border);
}
.level-btn.on .level-pips i.f,
.level-pips i.f { background: var(--gold); }
.level-desc { font-size: .74rem; color: var(--muted); line-height: 1.35; }

.modal-actions {
  display: flex;
  gap: .6rem;
  justify-content: center;
  margin-top: .4rem;
}
.modal-actions .btn-primary { flex: 1; }
.modal-actions .btn-ghost { flex: 0 0 auto; }

/* premena pešiaka */
.promo-modal { width: min(22rem, 100%); }
.promo-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .5rem;
}
.promo-btn {
  aspect-ratio: 1;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel);
  padding: 8%;
  transition: border-color .2s, background .2s, transform .15s;
}
.promo-btn:hover {
  border-color: var(--gold);
  background: var(--gold-soft);
  transform: translateY(-2px);
}
.promo-btn svg { width: 100%; height: 100%; stroke-width: 4; stroke-linejoin: round; }
.promo-btn.w svg { fill: var(--piece-w-fill); stroke: var(--piece-w-line); --detail: var(--piece-w-line); }
.promo-btn.b svg { fill: var(--piece-b-fill); stroke: var(--piece-b-line); --detail: var(--piece-b-line); }

/* koniec hry */
.over-modal { text-align: center; width: min(26rem, 100%); }
.over-title {
  margin: 0 0 .4rem;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 6vw, 2.5rem);
  font-weight: 700;
  letter-spacing: .05em;
  background: linear-gradient(175deg, hsl(42 65% 72%), hsl(38 55% 48%));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.over-sub {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 1rem;
}

/* ============ animácie ============ */

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-16px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(18px) scale(.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes pieceIn {
  from { opacity: 0; transform: translateY(-18%) scale(.85); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes pieceOut {
  from { opacity: 1; transform: scale(1); }
  to { opacity: 0; transform: scale(.55); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .35; }
}
@keyframes hintPulse {
  0%, 100% { box-shadow: inset 0 0 0 3px var(--gold); }
  50% { box-shadow: inset 0 0 0 5px hsl(42 85% 65%); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}