:root {--bg:#11171a;--surface:#1b2428;--surface2:#222e33;--stroke:#344249;--ink:#f1eee4;--muted:#abb8ba;--gold:#e6b96c;--gold-pale:#ffe2a1;--sq-light:#d5d9d4;--sq-dark:#909c9b;--danger:#ed8a84;--ok:#80c8ad}
*{box-sizing:border-box}
html {color-scheme:dark; scroll-behavior:smooth}
body{margin:0;min-height:100vh;background:radial-gradient(ellipse 700px 480px at 50% -50px,#26383b 0,transparent 86%),var(--bg);color:var(--ink);font:15px/1.45 system-ui,-apple-system,Segoe UI,Roboto,'Noto Sans',sans-serif}
button{font:inherit;cursor:pointer}
button:disabled{cursor:default;opacity:.45}
button:focus-visible{outline:3px solid var(--gold);outline-offset:2px}
button,button img{-webkit-tap-highlight-color:transparent}
.wrap{max-width:1170px;margin:0 auto;padding:22px 18px 35px}
header{display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--stroke);padding-bottom:18px;margin-bottom:22px}
.brand{display:flex;align-items:center;gap:14px}
.brand-symbol{width:52px;height:52px;border:1px solid #826b45;border-radius:14px;display:grid;place-items:center;font-size:28px;color:var(--gold);background:linear-gradient(145deg,#394448,#1a2427)}
.eyebrow{text-transform:uppercase;letter-spacing:.22em;color:var(--gold);font-weight:800;font-size:10px}
h1{font-family:Georgia,'Times New Roman',serif;font-size:30px;font-weight:500;letter-spacing:.05em;margin:0;line-height:1.1}
h1 span{font-size:20px;color:var(--gold);margin-left:7px}
header p{font-size:12px;color:var(--muted);margin:4px 0 0}
.app-grid{display:grid;grid-template-columns:minmax(0,665px) minmax(280px,1fr);gap:25px;align-items:start}
.card{background:linear-gradient(160deg,#212c30,#192226);border:1px solid var(--stroke);border-radius:20px;box-shadow:0 18px 42px #03070830}
.play-card{padding:14px}
.player-bar{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 7px}
.player{display:flex;gap:10px;align-items:center;min-width:0}
.avatar{height:36px;width:36px;border-radius:10px;display:grid;place-items:center;flex-shrink:0;font-family:Georgia,serif;font-size:17px;font-weight:700}
.avatar.white{background:#e9d9bc;color:#4a4135}.avatar.black{background:#394347;color:#ecece4;border:1px solid #617077}
.player-name{font-weight:750;font-size:14px}
.player-sub{font-size:11px;color:var(--muted)}
.turn-indicator{display:none;width:8px;height:8px;border-radius:100%;background:var(--gold);box-shadow:0 0 9px var(--gold)}
.player-bar.active .turn-indicator{display:block}
.player-bar.active .player-name{color:var(--gold-pale)}
.hand{display:flex;align-items:center;gap:5px;flex-wrap:wrap;min-height:42px;justify-content:flex-end}
.hand-empty{color:var(--muted);font-style:italic;font-size:11px}
.hand-piece{position:relative;width:39px;height:39px;display:grid;place-items:center;border:1px solid #566368;background:#2c373b;border-radius:9px;padding:2px}
.hand-piece img{width:100%;height:100%;object-fit:contain}
.hand-piece b{position:absolute;bottom:-3px;right:-4px;border:1px solid #1a2529;background:var(--gold);color:#201b13;border-radius:8px;padding:0 4px;font-size:11px;line-height:17px}
.hand-piece.selected{border-color:var(--gold);box-shadow:0 0 0 2px #e6b96c77}
.board-frame{border:4px solid #576164;border-radius:7px;background:#536063;overflow:hidden;box-shadow:0 6px 18px #0004}
.board{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));width:100%;aspect-ratio:7/8;user-select:none;touch-action:manipulation}
.square{position:relative;width:100%;aspect-ratio:1;background:var(--sq-light);border:none;border-radius:0;padding:0;min-width:0;overflow:hidden}
.square.dark{background:var(--sq-dark)}
.square img{position:absolute;width:98%;height:98%;top:1%;left:1%;object-fit:contain;pointer-events:none;user-select:none;z-index:2}
.square.legal:before{content:'';position:absolute;width:24%;aspect-ratio:1;border-radius:50%;background:#135f54aa;left:38%;top:38%;z-index:1}
.square.capture:before{content:'';position:absolute;inset:3px;border:5px solid #216c65b3;border-radius:50%;z-index:1}
.square.selected{box-shadow:inset 0 0 0 4px #eab85e;z-index:1}
.square.last{background-image:linear-gradient(#fad26066,#fad26066)}
.square.check{background-image:radial-gradient(circle,#c85b54bb 10%,#c85b5477 53%,transparent 85%)}
.square .coordinate{position:absolute;top:2px;left:4px;color:#31434a;font-size:10px;font-weight:800;opacity:.65;pointer-events:none}
.square .file{top:auto;left:auto;bottom:2px;right:4px}
.board-footer{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-top:10px}
.board-note{font-size:12px;color:var(--muted)}
.controls{display:flex;gap:8px;flex-wrap:wrap}
.control{border:1px solid #4b5b60;background:#2a383d;color:var(--ink);border-radius:11px;padding:9px 13px;font-weight:650;font-size:13px;white-space:nowrap}
.control:hover:not(:disabled){background:#3b4c52}
.control.primary{background:var(--gold);color:#211b14;border-color:var(--gold)}
.control.primary:hover{background:var(--gold-pale)}
.control.ghost{border-color:transparent;background:transparent}
.control.tiny{padding:7px 10px;font-size:12px}
.aside{display:grid;gap:15px}
.panel{padding:19px}
.panel h2{margin:0 0 14px;font-family:Georgia,serif;font-size:19px;font-weight:500}
.kicker{font-size:11px;font-weight:800;color:var(--gold);letter-spacing:.12em;text-transform:uppercase;margin:0 0 9px}
.status-title{font-family:Georgia,serif;font-size:22px;margin:0 0 3px}
.status-detail{color:var(--muted);font-size:13px;min-height:20px}
.status-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--ok);margin-right:7px}
.status-dot.warning{background:var(--danger)}
.action-row{display:flex;gap:7px;flex-wrap:wrap;margin-top:16px}
.log{display:flex;flex-direction:column;gap:5px;max-height:310px;overflow:auto;scrollbar-color:#586468 transparent;scrollbar-width:thin}
.log .entry{display:flex;align-items:center;gap:9px;color:#dee5e2;border-radius:8px;padding:8px 10px;background:#243137;font-size:12px}
.log .entry .num{font-size:11px;color:var(--gold);min-width:25px;font-weight:700}
.log .entry.recent{border:1px solid #907550}
.empty-log{padding:24px 10px;text-align:center;color:var(--muted);font-size:13px}
.tip-list{margin:0;padding-left:18px;font-size:12px;color:var(--muted)}
.tip-list li+li{margin-top:6px}
small{color:var(--muted)}
.toast{position:fixed;left:50%;bottom:20px;transform:translateX(-50%);border-radius:12px;padding:11px 15px;background:#31464a;color:#fff;border:1px solid #788382;box-shadow:0 16px 36px #0007;z-index:20;max-width:92vw;text-align:center;font-size:13px}
.toast[hidden]{display:none}
.modal-backdrop{position:fixed;inset:0;z-index:30;display:grid;place-items:center;padding:18px;background:#030708c9}
.modal-backdrop[hidden]{display:none}
.modal{width:min(530px,100%);max-height:86vh;overflow-y:auto;background:#202b30;border:1px solid #667174;border-radius:20px;padding:22px;box-shadow:0 20px 60px #0009}
.modal h2{margin:0 0 12px;font:normal 25px Georgia,serif}
.modal p,.modal li{color:#c9d1cf;font-size:14px}
.modal ul{padding-left:18px}
.modal .actions{display:flex;gap:8px;margin-top:19px;justify-content:flex-end}
.footer{padding-top:22px;text-align:center;color:#74868b;font-size:11px}
@media(max-width:900px){.app-grid{grid-template-columns:minmax(0,1fr);gap:15px}.wrap{max-width:690px}.aside{grid-template-columns:1fr 1fr}.aside .tips{grid-column:1/-1}}
@media(max-width:540px){.wrap{padding:12px 8px 26px}header{margin:0 4px 12px;padding-bottom:12px}.brand-symbol{width:41px;height:41px;font-size:22px}.brand{gap:9px}h1{font-size:23px}h1 span{font-size:16px}header p{font-size:10px}.play-card{padding:6px}.player-bar{padding:7px 4px}.player-name{font-size:12px}.player-sub{font-size:10px}.hand-piece{width:32px;height:32px}.avatar{height:30px;width:30px;border-radius:8px}.board-frame{border-width:3px}.square.capture:before{border-width:3px}.board-footer{padding:0 3px}.board-note{font-size:10px}.aside{grid-template-columns:1fr}.aside .tips{grid-column:auto}.panel{padding:15px}.status-title{font-size:20px}.footer{padding-top:15px}}

/* Human vs Fairy-Stockfish mode */
.engine-panel h2 {margin-bottom:10px}
.input-label {display:block;margin:10px 0 5px;font-size:12px;color:var(--muted,#a9adb2);font-weight:700}
.game-select {width:100%;border:1px solid #475352;border-radius:10px;background:#192426;color:#eff0e6;font-size:14px;min-height:40px;padding:8px;}
.game-select option {background:#192426;color:#fff}
.engine-fields {display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:4px 0 12px}
.engine-connect {width:100%;min-height:42px}
.engine-status {font-size:12px;line-height:1.45;color:#cbd9d5;margin-top:11px;min-height:36px;word-wrap:break-word}
.engine-status.error {color:#f5a6a6}
.engine-status.ready {color:#9cdec5}
.engine-debug {font-size:11px;color:#a9b7b0;margin-top:6px}
.engine-debug summary {cursor:pointer}
.engine-debug pre {white-space:pre-wrap;overflow-wrap:anywhere;max-height:145px;overflow:auto;background:#11191a;padding:8px;border-radius:8px;font-size:10px}
.engine-note {font-size:11px;color:#889f9a;line-height:1.5;margin-top:8px}
@media(max-width:480px){.engine-fields{grid-template-columns:1fr 1fr}}
/* Friendly notice when opening a downloaded HTML without required headers */
#isolationHelp[hidden]{display:none}
#isolationHelp{padding:12px;line-height:1.55;border:1px solid #b58f40;border-radius:10px;}

#startupHelp[hidden]{display:none!important}

#startupHelp:not([hidden]){margin:12px;padding:12px;border:1px solid #b58f40;border-radius:9px;background:#32291b;color:#f9e8b8}

/* Phase 2B · mobile play, review and appearance */
.board-status-bar{display:flex;align-items:center;justify-content:space-between;padding:6px 9px 12px;gap:12px}
.board-status-bar>div{display:flex;flex-direction:column;min-width:0}
.board-status-kicker{font-size:9px;letter-spacing:.17em;font-weight:800;color:var(--gold)}
#boardTurn{font-size:15px;font-weight:750;line-height:1.35;overflow-wrap:anywhere}
.review-badge{background:#4f3942;color:#ffe2b9;padding:5px 10px;border-radius:50px;font-size:11px;font-weight:700;border:1px solid #9c7d72}
.review-badge[hidden]{display:none}
.board-tools{display:flex;align-items:center;gap:7px;margin:9px 0 4px;flex-wrap:wrap}
.board-tools .control{min-height:36px}
.ply-indicator{margin-left:auto;color:var(--muted);font-size:11px;white-space:nowrap}
.review-controls{display:grid;grid-template-columns:repeat(3,minmax(0,1fr)) minmax(0,1.6fr);gap:7px;margin-top:10px}
.review-btn{height:42px;font-size:19px;padding:7px 4px;touch-action:manipulation}
.latest-btn{font-size:14px;color:var(--gold-pale)}
.latest-btn span{font-size:12px;font-weight:700;margin-left:4px}
.history-hint{color:var(--muted);font-size:12px;margin:-7px 0 12px}
.history-start,.history-move{color:var(--ink);border:1px solid transparent;border-radius:9px;background:#29373c;padding:9px 7px;font-size:12px;min-height:36px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-align:left}
.history-start{width:100%;text-align:center;color:var(--muted);margin-bottom:6px}
.history-start.chosen,.history-move.chosen{background:#5a4a32;border-color:var(--gold);color:#fff2cf}
.history-rows{display:grid;gap:5px}
.history-row{display:grid;grid-template-columns:28px minmax(0,1fr) minmax(0,1fr);gap:6px;align-items:center}
.history-row .num{color:var(--gold);text-align:right;font-weight:700;font-size:12px}
.history-move:hover,.history-start:hover{border-color:#d3ad72}
.board[data-board-theme="parchment"] .square{background:#e2d4ad}
.board[data-board-theme="parchment"] .square.dark{background:#a99777}
.board[data-board-theme="parchment"] .square .coordinate{color:#533e32;opacity:.8}
.board[data-board-theme="parchment"] .square.last{background-image:linear-gradient(#ffc44e77,#ffc44e77)}
.board[data-board-theme="parchment"] .square.check{background-image:radial-gradient(circle,#df6759dd 0,#cd665b77 55%,transparent 85%)}
@media(max-width:540px){
 .play-card{padding:7px 6px}
 .board-status-bar{padding:3px 6px 8px}
 .board-tools .control{min-height:39px}
 .review-btn{min-height:44px}
 .hand-piece{width:39px;height:39px;min-width:39px;touch-action:manipulation}
 .player-bar{gap:5px}
 .player{gap:6px}
 .hand{gap:5px;justify-content:flex-end}
 .player-bar .player-sub{max-width:125px}
 .board-footer{margin-top:9px}
}
@media(max-width:380px){
 .avatar{height:28px;width:28px}
 .player-bar .player-name{font-size:11px}
 .hand-piece{width:36px;height:36px;min-width:36px}
 .ply-indicator{font-size:10px}
}

/* Phase 2B.1: facing direction remains consistent when the board is flipped.
   Apply to the HTML image (NOT to the square or to the SVG contents).
   Cultivators never receive this class. */
.square img.sword-flipped,
.hand-piece img.sword-flipped {
  transform: rotate(180deg);
  transform-origin: 50% 50%;
}