:root {
  --bg-0: #201712;
  --bg-1: #2b1f17;
  --board: #dcb26b;
  --board-line: #6b4a26;
  --board-edge: #7a5228;
  --wood-dark: #4a3018;
  --wood-mid: #7a5228;
  --wood-light: #f1d9a6;
  --text-0: #f3e7d3;
  --text-1: #c9b799;
  --accent: #c0392b;
  --accent-2: #2e7d5b;
  --sente-color: #2a1a0d;
  --gote-color: #7a1616;
  --panel: #33251a;
  --panel-border: #5a3f24;
  --shadow: rgba(0,0,0,0.45);
  --legal-move: rgba(90, 200, 120, 0.55);
  --legal-capture: rgba(220, 80, 60, 0.55);
  --sel: rgba(255, 210, 90, 0.65);

  --piece-bg: linear-gradient(160deg, var(--wood-light), #d9b877 60%, var(--wood-mid));
  --piece-clip: polygon(50% 0%, 88% 18%, 100% 100%, 0% 100%, 12% 18%);
  --piece-radius: 0;
  --piece-border: none;
  --piece-font: "Shippori Mincho", serif;
  --piece-writing-mode: vertical-rl;
  --piece-letter-spacing: -1px;
  --piece-padding-top: 2px;
  --piece-sente-color: var(--sente-color);
  --piece-gote-color: var(--gote-color);
  --piece-promoted-color: var(--accent);
  --piece-promoted-gote-color: #ff8a75;

  --ui-font: "Zen Kaku Gothic New", "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
  --ui-font-weight: 500;
}

:root[data-piece-style="flat"] {
  --piece-bg: linear-gradient(160deg, #fbf3df, #e7d6ab);
  --piece-clip: none;
  --piece-radius: 22%;
  --piece-border: 1px solid #b99a5c;
  --piece-font: "Zen Kaku Gothic New", "Hiragino Sans", "Yu Gothic", sans-serif;
  --piece-writing-mode: horizontal-tb;
  --piece-letter-spacing: 0;
  --piece-padding-top: 0;
}

:root[data-piece-style="ink"] {
  --piece-bg: linear-gradient(160deg, #3f3327, #17110b);
  --piece-clip: polygon(50% 0%, 88% 18%, 100% 100%, 0% 100%, 12% 18%);
  --piece-radius: 0;
  --piece-border: none;
  --piece-font: "Shippori Mincho", serif;
  --piece-writing-mode: vertical-rl;
  --piece-letter-spacing: -1px;
  --piece-padding-top: 2px;
  --piece-sente-color: #f0cf8a;
  --piece-gote-color: #ff8f6b;
  --piece-promoted-color: #ffb238;
  --piece-promoted-gote-color: #ff5b4a;
}

:root[data-piece-style="ivory"] {
  --piece-bg: linear-gradient(160deg, #fffaf0, #f1e8d2);
  --piece-clip: none;
  --piece-radius: 16%;
  --piece-border: 1.5px solid #cbb37c;
  --piece-font: "Shippori Mincho", serif;
  --piece-writing-mode: vertical-rl;
  --piece-letter-spacing: -1px;
  --piece-padding-top: 2px;
  --piece-sente-color: #1c1c1c;
  --piece-gote-color: #9c1f1f;
  --piece-promoted-color: #b23b2b;
  --piece-promoted-gote-color: #e0503a;
}

:root[data-ui-font="yugo-bold"] {
  --ui-font: "Yu Gothic", "YuGothic", "游ゴシック体", "游ゴシック", "Yu Gothic UI", Meiryo, sans-serif;
  --ui-font-weight: 700;
  --piece-font: var(--ui-font);
  --piece-writing-mode: horizontal-tb;
  --piece-letter-spacing: 0;
  --piece-padding-top: 0;
}

:root[data-theme="light"] {
  --bg-0: #efe3cc;
  --bg-1: #f7ecd6;
  --board: #ecc989;
  --board-line: #8a5f30;
  --board-edge: #8a5f30;
  --wood-dark: #6b4620;
  --wood-mid: #b98444;
  --wood-light: #fff6e2;
  --text-0: #2c1d10;
  --text-1: #5c4327;
  --panel: #fff2da;
  --panel-border: #c8a06a;
  --shadow: rgba(90, 60, 20, 0.25);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg-0: #efe3cc;
    --bg-1: #f7ecd6;
    --board: #ecc989;
    --board-line: #8a5f30;
    --board-edge: #8a5f30;
    --wood-dark: #6b4620;
    --wood-mid: #b98444;
    --wood-light: #fff6e2;
    --text-0: #2c1d10;
    --text-1: #5c4327;
    --panel: #fff2da;
    --panel-border: #c8a06a;
    --shadow: rgba(90, 60, 20, 0.25);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: radial-gradient(ellipse at top, var(--bg-1), var(--bg-0) 70%);
  color: var(--text-0);
  font-family: var(--ui-font);
  font-weight: var(--ui-font-weight);
  overscroll-behavior: none;
  -webkit-tap-highlight-color: transparent;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px 12px 28px;
  gap: 10px;
  max-width: 640px;
  margin: 0 auto;
}

.topbar {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 4px;
}

.logo {
  margin: 0;
  line-height: 0;
}
.logo-img {
  height: clamp(26px, 6.5vw, 38px);
  width: auto;
  display: block;
}

.topbar-buttons { display: flex; gap: 8px; }
.icon-btn {
  width: 38px; height: 38px;
  border-radius: 10px;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--text-0);
  font-size: 18px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: transform 0.12s ease, background 0.12s ease;
}
.icon-btn:active { transform: scale(0.92); }
.icon-btn:hover { background: var(--wood-mid); }

.status-bar {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: clamp(13px, 3.4vw, 15px);
  color: var(--text-1);
  padding: 2px 6px;
}
.turn-indicator {
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  color: var(--wood-light);
}
.turn-indicator.sente { background: var(--sente-color); }
.turn-indicator.gote { background: var(--gote-color); }
.check-indicator {
  color: #ff5b4a;
  font-weight: 700;
  animation: pulse 1s infinite;
}
.check-indicator.hidden { display: none; }
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}
#move-count { margin-left: auto; }

.board-area {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.hand {
  width: 100%;
  min-height: 46px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 12px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  align-items: center;
}
.hand-empty {
  color: var(--text-1);
  font-size: 12px;
  opacity: 0.5;
  padding: 4px 2px;
}

.hand-piece {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: 8px;
  cursor: pointer;
  background: var(--piece-bg);
  border: 1px solid var(--wood-dark);
  box-shadow: 0 2px 4px var(--shadow);
  transition: transform 0.1s ease;
}
.hand-piece:hover { transform: translateY(-2px); }
.hand-piece.gote:hover { transform: rotate(180deg) translateY(-2px); }
.hand-piece.selected {
  outline: 3px solid var(--sel);
  outline-offset: 2px;
}
.hand-piece.gote {
  transform: rotate(180deg);
}
.hand-piece .hp-name {
  font-family: var(--piece-font);
  font-weight: 700;
  font-size: 17px;
  color: var(--piece-sente-color);
}
.hand-piece.gote .hp-name {
  color: var(--piece-gote-color);
}
.hand-piece.gote .hp-count {
  transform: rotate(180deg);
}
.hp-count {
  position: absolute;
  bottom: -4px;
  right: -4px;
  background: var(--accent);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  border-radius: 999px;
  min-width: 15px;
  height: 15px;
  display: flex; align-items: center; justify-content: center;
  padding: 0 3px;
}

.board-wrap {
  padding: 10px;
  border-radius: 10px;
  background: linear-gradient(160deg, var(--wood-mid), var(--wood-dark));
  box-shadow: 0 8px 24px var(--shadow), inset 0 0 0 1px var(--board-edge);
}

.board {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  grid-template-rows: repeat(9, minmax(0, 1fr));
  width: min(88vw, 460px);
  height: min(88vw, 460px);
  background: var(--board);
  border: 2px solid var(--board-edge);
  box-shadow: inset 0 0 20px rgba(0,0,0,0.15);
}

.cell {
  position: relative;
  min-width: 0;
  min-height: 0;
  border: 1px solid var(--board-line);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  overflow: hidden;
}

.cell.last-to { background: rgba(255, 214, 110, 0.35); }
.cell.last-from { background: rgba(255, 214, 110, 0.16); }
.cell.selected { background: var(--sel); }

.cell.legal-move::after {
  content: "";
  width: 26%;
  height: 26%;
  border-radius: 50%;
  background: var(--legal-move);
}
.cell.legal-capture::after {
  content: "";
  position: absolute;
  inset: 4%;
  border-radius: 6px;
  border: 3px solid var(--legal-capture);
  background: transparent;
}
.cell.king-check { box-shadow: inset 0 0 0 3px #ff3b2f; }

.piece {
  width: 88%;
  height: 88%;
  min-width: 0;
  min-height: 0;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--piece-font);
  font-weight: 700;
  font-size: clamp(14px, 3.6vw, 20px);
  color: var(--piece-sente-color);
  background: var(--piece-bg);
  border: var(--piece-border);
  border-radius: var(--piece-radius);
  clip-path: var(--piece-clip);
  box-shadow: 0 2px 3px rgba(0,0,0,0.35);
  user-select: none;
  writing-mode: var(--piece-writing-mode);
  letter-spacing: var(--piece-letter-spacing);
  padding-top: var(--piece-padding-top);
}
.piece.gote {
  transform: rotate(180deg);
  color: var(--piece-gote-color);
}
.piece.promoted { color: var(--piece-promoted-color); }
.piece.gote.promoted { color: var(--piece-promoted-gote-color); }

.modal {
  position: fixed;
  inset: 0;
  background: rgba(10, 6, 3, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  padding: 20px;
}
.modal.hidden { display: none; }
.modal-card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 22px 24px;
  max-width: 320px;
  width: 100%;
  text-align: center;
  box-shadow: 0 10px 30px var(--shadow);
}
.modal-card p { margin: 0 0 16px; font-size: 16px; color: var(--text-0); }
.modal-buttons { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.modal-buttons button {
  flex: 1;
  min-width: 110px;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--panel-border);
  background: linear-gradient(160deg, var(--wood-light), var(--wood-mid));
  color: var(--sente-color);
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
}
.modal-buttons button:active { transform: scale(0.97); }

.menu-card { text-align: left; max-width: 360px; }
.menu-title { font-weight: 700; font-size: 17px; }
.menu-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  font-size: 14px;
  color: var(--text-1);
  gap: 10px;
}
.menu-row.menu-row-wrap {
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}
.seg { display: flex; gap: 6px; flex-wrap: wrap; }
.seg-btn {
  padding: 7px 10px;
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  background: transparent;
  color: var(--text-1);
  font-size: 12px;
  cursor: pointer;
}
.seg-btn.active {
  background: var(--accent-2);
  color: #fff;
  border-color: var(--accent-2);
}

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  color: var(--text-0);
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 13px;
  box-shadow: 0 6px 18px var(--shadow);
  z-index: 60;
  transition: opacity 0.2s ease;
}
.toast.hidden { display: none; }

@media (max-width: 380px) {
  .hand-piece { width: 36px; height: 36px; }
  .hp-name { font-size: 15px; }
}