:root {
  --bg: #14110f;
  --surface: #1c1815;
  --surface-2: #241f1a;
  --line: #352d25;
  --ink: #f4ede2;
  --muted: #a3968a;
  --accent: #d4713c;
  --accent-dim: rgba(212, 113, 60, 0.22);
  --sage: #7f9673;
  --danger: #c8452f;
  --light-sq: #ead9bd;
  --dark-sq: #5e7359;
  --radius: 14px;
  --shadow: 0 24px 60px -30px rgba(0, 0, 0, 0.9);
  --board-max: 620px;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 12% -10%, rgba(212, 113, 60, 0.10), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(127, 150, 115, 0.10), transparent 55%),
    var(--bg);
  color: var(--ink);
  font-family: 'Space Grotesk', 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.skip {
  position: absolute; left: -999px; top: 0; z-index: 50;
  background: var(--accent); color: #fff; padding: 10px 16px; border-radius: 0 0 10px 0;
}
.skip:focus { left: 0; }

/* --- Yläpalkki --- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; padding: 22px clamp(16px, 4vw, 46px) 10px;
  max-width: 1320px; margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark { border-radius: 11px; box-shadow: 0 8px 24px -12px rgba(212, 113, 60, 0.9); }
.brand-text { display: flex; flex-direction: column; line-height: 1.05; }
.brand-name {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 600; font-size: 27px; letter-spacing: -0.02em;
}
.brand-dot { color: var(--accent); }
.brand-tag { font-size: 12.5px; color: var(--muted); letter-spacing: 0.06em; text-transform: lowercase; }
.topbar-actions { display: flex; gap: 10px; }

/* --- Napit --- */
.btn {
  font: inherit; font-weight: 500; cursor: pointer;
  border-radius: 10px; padding: 9px 16px; border: 1px solid transparent;
  transition: transform 0.12s ease, background 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #1a0f07; border-color: var(--accent); font-weight: 600; }
.btn-primary:hover { background: #e4834e; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-ghost:disabled { opacity: 0.4; cursor: default; border-color: var(--line); color: var(--muted); }

/* --- Asettelu --- */
.layout {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) minmax(300px, 384px);
  gap: clamp(20px, 3vw, 44px);
  align-items: start;
  max-width: 1320px;
  margin: 0 auto;
  padding: 10px clamp(16px, 4vw, 46px) 40px;
}

.board-column { display: flex; flex-direction: column; gap: 10px; }

.player-strip {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 4px; min-height: 34px;
  font-size: 14px; color: var(--muted);
}
.player-dot {
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--muted); box-shadow: 0 0 0 1px rgba(255,255,255,0.12) inset;
}
#strip-bottom .player-dot { background: #f0e6d6; }
#strip-top .player-dot { background: #2a2420; box-shadow: 0 0 0 1px rgba(255,255,255,0.3) inset; }
.player-strip.turn { color: var(--ink); }
.player-strip.turn .player-name { color: var(--accent); font-weight: 600; }
.player-name { letter-spacing: 0.02em; }
.player-captures { display: flex; align-items: center; gap: 1px; flex: 1; min-height: 22px; }
.player-captures .cap { width: 19px; height: 19px; opacity: 0.75; }
.player-captures .cap:not(:first-child) { margin-left: -6px; }
.player-score { font-variant-numeric: tabular-nums; font-size: 13px; color: var(--sage); }

.board-frame {
  position: relative;
  padding: 12px;
  background: linear-gradient(160deg, #2a231d, #1a1512);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  max-width: var(--board-max);
  width: 100%;
}

.board {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  aspect-ratio: 1;
  border-radius: 8px;
  overflow: hidden;
  touch-action: manipulation;
  outline: none;
}
.board:focus-visible { box-shadow: 0 0 0 3px var(--accent); }

.sq {
  position: relative;
  display: flex; align-items: center; justify-content: center;
  border: 0; padding: 0; margin: 0;
  background: var(--light-sq);
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.sq.dark { background: var(--dark-sq); }
.sq .coord {
  position: absolute; font-size: 10.5px; font-weight: 600; letter-spacing: 0.04em;
  opacity: 0.55; pointer-events: none;
}
.sq .coord.file { right: 4px; bottom: 2px; }
.sq .coord.rank { left: 4px; top: 2px; }
.sq.light .coord { color: #6d5c45; }
.sq.dark .coord { color: #dce6d4; }

.sq.last::after {
  content: ''; position: absolute; inset: 0;
  background: var(--accent-dim);
  pointer-events: none;
}
.sq.selected::after {
  content: ''; position: absolute; inset: 0;
  background: rgba(212, 113, 60, 0.34);
  box-shadow: inset 0 0 0 3px var(--accent);
  pointer-events: none;
}
.sq.hover-target::after {
  content: ''; position: absolute; inset: 0;
  box-shadow: inset 0 0 0 4px rgba(244, 237, 226, 0.85);
  pointer-events: none;
}
.sq.check {
  background-image: radial-gradient(circle at center, rgba(200, 69, 47, 0.95) 12%, rgba(200, 69, 47, 0.35) 52%, transparent 74%);
}

.hint {
  position: absolute; width: 27%; height: 27%; border-radius: 50%;
  background: rgba(20, 17, 15, 0.32); pointer-events: none;
}
.sq.dark .hint { background: rgba(12, 20, 10, 0.36); }
.hint.capture {
  width: 88%; height: 88%; background: none; border-radius: 50%;
  box-shadow: inset 0 0 0 5px rgba(20, 17, 15, 0.3);
}
.sq.dark .hint.capture { box-shadow: inset 0 0 0 5px rgba(12, 20, 10, 0.34); }

.piece {
  position: relative; z-index: 2;
  width: 88%; height: 88%;
  display: flex; align-items: center; justify-content: center;
  pointer-events: none;
  filter: drop-shadow(0 3px 3px rgba(0, 0, 0, 0.32));
}
.piece-svg { width: 100%; height: 100%; }
.piece-body { fill: var(--piece-fill); stroke: var(--piece-stroke); stroke-width: 1.35; }
.piece-line, .piece-cross { fill: none; stroke: var(--piece-stroke); stroke-width: 1.7; }
.piece-cross { stroke-width: 2.6; }
.piece-eye { fill: var(--piece-stroke); stroke: none; }
.piece.w { --piece-fill: #f6efe2; --piece-stroke: #2b2119; }
.piece.b { --piece-fill: #2a2420; --piece-stroke: #e5dbcb; }
.piece.dragging { opacity: 0.28; }

.drag-ghost {
  position: fixed; z-index: 60; pointer-events: none;
  filter: drop-shadow(0 10px 14px rgba(0, 0, 0, 0.5));
  transform: translate(-50%, -50%) scale(1.06);
}

.board-overlay {
  position: absolute; inset: 12px;
  display: grid; place-items: center;
  background: rgba(20, 17, 15, 0.78);
  backdrop-filter: blur(3px);
  border-radius: 8px; z-index: 8;
}
.overlay-card { text-align: center; padding: 26px; max-width: 320px; }
.overlay-title { font-family: 'Fraunces', Georgia, serif; font-size: 32px; margin: 0 0 6px; letter-spacing: -0.02em; }
.overlay-text { color: var(--muted); margin: 0 0 18px; }
.overlay-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

/* --- Sivupaneeli --- */
.side { display: flex; flex-direction: column; gap: 14px; position: sticky; top: 18px; }

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.panel-title {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 15px; font-weight: 600; margin: 0 0 12px;
  letter-spacing: 0.02em; color: var(--muted);
  text-transform: uppercase;
}
.panel-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.panel-head .panel-title { margin: 0; }

.status-panel { border-left: 3px solid var(--accent); }
.status-line { font-family: 'Fraunces', Georgia, serif; font-size: 21px; margin: 0; letter-spacing: -0.01em; }
.status-sub { margin: 4px 0 0; font-size: 13.5px; color: var(--muted); }
.thinking { display: flex; align-items: center; gap: 10px; margin-top: 12px; font-size: 13px; color: var(--sage); }
.thinking-bar {
  width: 42px; height: 3px; border-radius: 2px; overflow: hidden;
  background: linear-gradient(90deg, var(--sage), transparent);
  animation: pulse 1.1s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 0.3; transform: scaleX(0.6); } 50% { opacity: 1; transform: scaleX(1); } }

.field { margin-bottom: 14px; }
.field-label { display: block; font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-bottom: 7px; }
.field-note { font-size: 12px; color: var(--muted); margin: 0; opacity: 0.75; }

.segmented { display: flex; flex-wrap: wrap; gap: 6px; }
.seg {
  font: inherit; font-size: 13.5px; cursor: pointer;
  background: var(--surface-2); color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; padding: 6px 13px;
  transition: all 0.15s ease;
}
.seg:hover { color: var(--ink); }
.seg.active { background: var(--accent); border-color: var(--accent); color: #1a0f07; font-weight: 600; }

.moves-panel { display: flex; flex-direction: column; min-height: 176px; }
.nav-buttons { display: flex; gap: 4px; }
.icon-btn {
  width: 30px; height: 30px; display: grid; place-items: center; cursor: pointer;
  background: var(--surface-2); border: 1px solid var(--line); border-radius: 8px; color: var(--muted);
}
.icon-btn:hover { color: var(--accent); border-color: var(--accent); }
.icon-btn svg { width: 15px; height: 15px; fill: currentColor; stroke: currentColor; }

.moves {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: 34px 1fr 1fr; gap: 2px 4px;
  align-content: start;
  max-height: 232px; overflow-y: auto;
  font-size: 14.5px; font-variant-numeric: tabular-nums;
  scrollbar-width: thin;
}
.moves-empty { grid-column: 1 / -1; color: var(--muted); font-size: 13.5px; }
.move-no { color: var(--muted); font-size: 13px; padding: 3px 0; }
.move {
  background: none; border: 0; font: inherit; color: var(--ink);
  text-align: left; padding: 3px 7px; border-radius: 6px; cursor: pointer;
}
.move:hover { background: var(--surface-2); }
.move.current { background: var(--accent-dim); color: var(--accent); font-weight: 600; }

.tools { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.tools .btn { font-size: 13.5px; padding: 8px 10px; }

.footer {
  max-width: 1320px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 46px) 40px;
  color: var(--muted); font-size: 13px; max-inline-size: 62ch;
}

/* --- Modaalit --- */
.modal {
  position: fixed; inset: 0; z-index: 40;
  display: grid; place-items: center;
  background: rgba(10, 8, 7, 0.72);
  backdrop-filter: blur(4px);
  padding: 20px;
}
.modal[hidden] { display: none; }
.modal-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: 18px;
  padding: 24px; max-width: 340px; width: 100%; box-shadow: var(--shadow);
}
.modal-wide { max-width: 520px; }
.modal-title { font-family: 'Fraunces', Georgia, serif; font-size: 22px; margin: 0 0 16px; }
.promo-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.promo-btn {
  aspect-ratio: 1; background: var(--surface-2); border: 1px solid var(--line);
  border-radius: 12px; cursor: pointer; padding: 6px; display: grid; place-items: center;
}
.promo-btn:hover { border-color: var(--accent); background: #2c241d; }
.promo-btn .piece { width: 100%; height: 100%; pointer-events: none; }
.rules-body { font-size: 14.5px; color: var(--ink); }
.rules-body ul { padding-left: 20px; margin: 12px 0; }
.rules-body li { margin-bottom: 7px; }
.rules-body p { margin: 0 0 10px; }
.rules-keys { color: var(--muted); font-size: 13px; }
#rules-close { margin-top: 14px; width: 100%; }

@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
  .side { position: static; }
  .board-frame { max-width: min(94vw, 620px); margin: 0 auto; }
  .board-column { align-items: stretch; }
  .player-strip { max-width: min(94vw, 620px); width: 100%; margin: 0 auto; }
  .moves { max-height: 180px; }
}

@media (max-width: 560px) {
  .topbar { flex-wrap: wrap; }
  .brand-name { font-size: 23px; }
  .tools { grid-template-columns: 1fr 1fr; }
  .board-frame { padding: 7px; border-radius: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}