/* Direction A shell — shared tokens/components first, then ONE decision at 1024 css px:
   desktop (min-width:1024px) and mobile (max-width:1023.98px). The number must equal
   LAYOUT_BREAKPOINT_PX in hi3d-layout.mjs (tools/test-web-layout.mjs checks it). */
:root{--a-ink:#efe6cf;--a-muted:#b4ab90;--a-gold:#dbc07c;--a-gold-hi:#f0d99c;--a-gold-dim:#a88c52;--a-on-gold:#1d2214;
  --a-bg:#0b1411;--a-panel:#0f1d18;--a-raised:#162922;--a-line:#c8a962b0;--a-line-soft:#c8a96258;--a-danger:#d06255;--a-ok:#7fc4a2;--a-red:#c94f3c;
  --a-header-h:64px;--a-radius:4px;--a-safe-b:env(safe-area-inset-bottom,0px);--a-safe-t:env(safe-area-inset-top,0px)}
/* The shell replaces the older floating controls; they stay in the DOM because the game drives them. */
header:not(#a-header),.panel,.player-hud,.suggestion-control,.round-action,.camera-float,.camera-tools,.camera-settings,footer,.top-actions,.vignette,.panel #pause{display:none!important}
.panel{position:absolute;pointer-events:none}.panel button{pointer-events:none}
body{font-family:'Inter','Segoe UI',system-ui,-apple-system,Arial,sans-serif;-webkit-tap-highlight-color:transparent}
/* icons: atlas tiles used as masks, doubled so thin strokes stay readable */
.a-ic{--ix:0;--iy:0;display:inline-block;flex:none;width:1.6em;height:1.6em;background:currentColor;
  -webkit-mask-image:url(assets/ui/a-icons.png),url(assets/ui/a-icons.png);mask-image:url(assets/ui/a-icons.png),url(assets/ui/a-icons.png);
  filter:drop-shadow(0 0 .5px currentColor) drop-shadow(0 0 .5px currentColor);-webkit-mask-size:800% 500%,800% 500%;mask-size:800% 500%,800% 500%;-webkit-mask-repeat:no-repeat;mask-repeat:no-repeat;
  -webkit-mask-position:calc(var(--ix)*100%/7) calc(var(--iy)*100%/4),calc(var(--ix)*100%/7) calc(var(--iy)*100%/4);mask-position:calc(var(--ix)*100%/7) calc(var(--iy)*100%/4),calc(var(--ix)*100%/7) calc(var(--iy)*100%/4)}
.a-ic-home{--ix:0;--iy:0}.a-ic-book{--ix:1}.a-ic-editor{--ix:2}.a-ic-gear{--ix:3}.a-ic-back{--ix:4}.a-ic-next{--ix:5}.a-ic-hint{--ix:0;--iy:2}.a-ic-history{--ix:1;--iy:2}.a-ic-camera{--ix:2;--iy:2}.a-ic-pause{--ix:3;--iy:2}.a-ic-play{--ix:4;--iy:2}
.a-ic-branch{--ix:7;--iy:2}.a-ic-position{--ix:3;--iy:3}.a-ic-reset{--ix:5;--iy:3}.a-ic-help{--ix:6;--iy:3}
/* components */
.a-panel{position:fixed;z-index:3;background:linear-gradient(180deg,#0f1d18f2,#0b1612f6);border:1px solid var(--a-line);border-radius:var(--a-radius);box-shadow:inset 0 0 0 4px #0b1612,inset 0 0 0 5px var(--a-line-soft),0 18px 48px #000a;color:var(--a-ink)}
.a-btn{display:flex;align-items:center;justify-content:center;gap:10px;min-height:44px;padding:8px 14px;border:1px solid var(--a-line);border-radius:var(--a-radius);background:var(--a-raised);color:var(--a-ink);font:500 15px/1.2 inherit;cursor:pointer;transition:background .15s,border-color .15s,transform .05s}
.a-btn:hover:not(:disabled){background:#21372d;border-color:var(--a-gold)}.a-btn:active:not(:disabled){transform:translateY(1px)}
.a-btn:focus-visible,.a-nav button:focus-visible,.a-tabbar button:focus-visible,.a-seg button:focus-visible,.a-side-cards button:focus-visible,.a-help-list button:focus-visible,.a-header-tools button:focus-visible,.a-viewbar button:focus-visible{outline:2px solid var(--a-gold-hi);outline-offset:2px}
.a-btn:disabled{opacity:.5;cursor:default}
.a-primary{background:#17382e;border:1.6px solid var(--a-gold);color:var(--a-gold-hi);font-weight:600}.a-primary:hover:not(:disabled){background:#1f4a3b}
.a-danger{background:#3e1b18;border-color:var(--a-danger);color:#f0b4a8}.a-danger:hover:not(:disabled){background:#5a221e;border-color:var(--a-danger)}
.a-stack{display:flex;flex-direction:column;align-items:flex-start;text-align:left;min-width:0}.a-stack b{font:600 17px 'Lora',Georgia,serif;color:var(--a-ink)}.a-stack small{font-size:13px;color:var(--a-muted);margin-top:2px}
.a-chev{margin-left:auto;font-size:26px;line-height:1;color:var(--a-gold-dim)}
.a-sub{margin:0;color:var(--a-muted);font-size:15px}
.a-disc,.a-discs i{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#f6ecce,#e0cf9f);color:#16130e;font:600 24px 'Noto Serif SC','Songti SC',serif;font-style:normal;border:1.5px solid var(--a-gold-dim);box-shadow:0 2px 3px #0008}
.a-disc.red,.a-discs i.red{color:#b4221c}
/* ---- header ---- */
.a-header{position:fixed;inset:0 0 auto 0;z-index:4;height:calc(var(--a-header-h) + var(--a-safe-t));padding-top:var(--a-safe-t);display:flex;align-items:center;gap:16px;padding-inline:16px;background:linear-gradient(180deg,#070f0cf8,#0c1814e8);border-bottom:1px solid var(--a-line)}
.a-brand{display:flex;align-items:center;gap:10px;color:var(--a-gold-hi);text-decoration:none}.a-brand img{width:44px;height:44px;object-fit:contain}
.a-brand span{display:flex;flex-direction:column;line-height:1.1}.a-brand b{font:600 24px 'Lora',Georgia,serif;letter-spacing:.04em}.a-brand small{font-size:12px;color:var(--a-muted);margin-top:3px}
.a-nav{position:absolute;left:50%;transform:translateX(-50%);display:flex;gap:6px;height:100%}
.a-nav button,.a-tabbar button{display:flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:0;background:none;color:var(--a-muted);font:500 15px inherit;padding:0 20px;cursor:pointer;position:relative}
.a-nav button:hover,.a-tabbar button:hover{color:var(--a-ink);background:none}
.a-nav button[aria-current=page],.a-tabbar button[aria-current=page]{color:var(--a-gold-hi)}
.a-nav button[aria-current=page]::after{content:'';position:absolute;left:14px;right:14px;bottom:-1px;height:3px;background:var(--a-gold)}
.a-header-tools{margin-left:auto;display:flex;gap:4px}.a-header-tools button{width:48px;height:48px;padding:0;border:0;background:none;color:var(--a-gold);display:grid;place-items:center;border-radius:50%}.a-header-tools button:hover{background:#c8a96222}.a-header-tools .a-ic{width:30px;height:30px}
/* ---- home ---- */
.a-home{display:none;flex-direction:column;gap:14px;overflow:auto}
body[data-screen=home] .a-home{display:flex}
.a-home h1{margin:0;font:600 clamp(34px,3.4vw,46px)/1 'Lora',Georgia,serif;letter-spacing:.03em;color:var(--a-gold-hi)}
.a-home .a-primary{min-height:76px;justify-content:flex-start;gap:16px;padding-inline:16px}.a-home .a-primary .a-label{font:600 clamp(20px,2vw,26px) 'Lora',Georgia,serif}
.a-discs{display:flex}.a-discs i+i{margin-left:-14px}
.a-row{justify-content:flex-start;gap:14px;min-height:60px}.a-row .a-ic{width:34px;height:34px;color:var(--a-gold)}
.a-card{justify-content:flex-start;gap:14px;min-height:112px;padding:10px 16px}.a-card img{width:88px;height:88px;object-fit:contain;filter:drop-shadow(0 2px 4px #0008)}
.a-tiles{display:grid;grid-template-columns:1fr 1fr;gap:12px}.a-tile{flex-direction:column;min-height:84px;gap:6px;font-size:14px}.a-tile .a-ic{width:34px;height:34px;color:var(--a-gold)}
.a-ghost{background:transparent;border-color:transparent;border-top:1px solid var(--a-line-soft);border-radius:0}
/* ---- play side panel ---- */
.a-side{display:none;flex-direction:column;gap:8px;padding:14px}
body[data-screen=play] .a-side{display:flex}
.a-player{display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid var(--a-line-soft);border-radius:var(--a-radius);background:var(--a-raised)}
.a-player[data-active=true]{border-color:var(--a-gold);border-width:1.6px}.a-player.a-me[data-active=true][data-red=true]{background:#4a1a18ee}.a-player.a-me[data-active=true][data-red=false]{background:#18403aee}
.a-avatar{display:grid;place-items:center;width:56px;height:56px;border-radius:50%;border:2px solid var(--a-gold);background:#12221c;flex:none}.a-avatar img{width:44px;height:44px;object-fit:contain}
.a-me .a-disc{width:56px;height:56px;flex:none}
.a-player .a-stack b{font-size:18px}
.a-clock{margin-left:auto;min-width:92px;padding:8px 10px;text-align:center;border:1px solid var(--a-line-soft);border-radius:var(--a-radius);background:#0b1411;font:600 24px 'Lora',Georgia,serif;color:var(--a-ink)}
.a-clock[hidden]{display:none}
.a-history summary{cursor:pointer;list-style:none}
.a-history summary::after{content:'⌄';margin-left:auto;font:18px/1 sans-serif}
.a-history[open] summary::after{content:'⌃'}
.a-history summary::-webkit-details-marker{display:none}
/* Một cụm hành động duy nhất sau khi kết thúc, nằm trong panel chơi. */
body[data-screen=play].finished #result-actions{display:none!important}
.dialog-close{position:relative;z-index:3;flex:none}
#library-dialog:not(.opening-editing)>.dialog-close{position:sticky;top:0}
.a-turn{margin:2px auto;display:inline-flex;align-items:center;gap:10px;padding:5px 22px;border:1px solid var(--a-gold-dim);border-radius:999px;background:var(--a-bg);font-size:14px;letter-spacing:.04em}.a-turn i{width:10px;height:10px;border-radius:50%;background:var(--a-red)}.a-turn[data-turn=b] i{background:var(--a-ok)}
.a-history{flex:1;min-height:90px;display:flex;flex-direction:column;border:1px solid var(--a-line-soft);border-radius:var(--a-radius);background:#0d1914}
.a-history summary{margin:0;padding:10px 12px;font:600 17px 'Lora',Georgia,serif;display:flex;align-items:center;gap:8px;border-bottom:1px solid var(--a-line-soft)}.a-history summary .a-ic{width:22px;height:22px;color:var(--a-gold)}
.a-history ol{flex:1;margin:0;padding:8px 12px;list-style:none;overflow:auto;font-size:14px;line-height:1.7}.a-history ol:empty{display:none}.a-history p{margin:auto;color:var(--a-muted);padding:18px}.a-history p[hidden]{display:none}
.a-hint-status{margin:0;min-height:0;font-size:13px;color:var(--a-gold-hi)}.a-hint-status:empty{display:none}
.a-tools{display:grid;grid-template-columns:1fr 1fr;gap:8px}.a-tools #a-menu{display:none}.a-tools #a-pause{grid-column:1/-1}.a-wide{width:100%;min-height:52px}
/* ---- board view bar ---- */
.a-viewbar{display:none;position:fixed;left:24px;bottom:16px;z-index:3;align-items:center;gap:8px;padding:8px 12px;background:#0f1d18ee;border:1px solid var(--a-line);border-radius:var(--a-radius);font-size:13px;color:var(--a-muted)}
.a-viewbar button{padding:6px 14px;border-radius:999px;border:1px solid var(--a-line-soft);background:transparent;color:var(--a-ink);font-size:13px;min-height:32px}.a-viewbar button[aria-pressed=true]{background:var(--a-gold);color:var(--a-on-gold);border-color:var(--a-gold)}.a-viewbar em{font-style:normal;margin-left:6px;padding-left:12px;border-left:1px solid var(--a-line-soft)}
body[data-screen=play] .a-viewbar{display:flex}
.a-check{display:flex;align-items:center;gap:10px;font-size:14px}.a-check input{width:20px;height:20px;accent-color:#dbc07c}
/* ---- dialogs ---- */
.a-dialog{width:min(560px,calc(100vw - 24px));max-height:calc(100dvh - 24px);overflow:auto;padding:26px 28px;background:linear-gradient(180deg,#0f1d18,#0b1612);border:1px solid var(--a-line);border-radius:var(--a-radius);color:var(--a-ink);box-shadow:inset 0 0 0 4px #0b1612,inset 0 0 0 5px var(--a-line-soft),0 24px 70px #000c}
.a-dialog::backdrop,dialog::backdrop{background:#070d0bcc}
.a-dialog h2{margin:0 0 4px;text-align:center;font:600 30px 'Lora',Georgia,serif;color:var(--a-gold-hi)}.a-dialog h3{margin:18px 0 8px;font:500 16px inherit}
.a-dialog>.a-sub{text-align:center;margin-bottom:16px}.a-narrow{width:min(440px,calc(100vw - 24px))}
.a-seg{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--a-line);border-radius:var(--a-radius);overflow:hidden}.a-seg button{min-height:48px;border:0;background:#0b1411;color:var(--a-ink);font-size:16px;border-radius:0}.a-seg button[aria-checked=true]{background:#17382e;box-shadow:inset 0 0 0 1.6px var(--a-gold);color:var(--a-gold-hi)}
.a-vs{display:flex;align-items:center;gap:16px;margin:18px 0 4px}.a-vs img{width:72px;height:72px;border-radius:50%;border:2px solid var(--a-gold);background:#12221c;object-fit:contain;padding:6px}.a-vs b{font:600 28px 'Lora',Georgia,serif;color:var(--a-gold-hi)}
.a-side-cards{display:grid;grid-template-columns:1fr 1fr;gap:12px}.a-side-cards button{display:flex;flex-direction:column;align-items:center;gap:4px;padding:14px 8px;min-height:120px;border:1px solid var(--a-line);border-radius:var(--a-radius);background:var(--a-raised);color:var(--a-ink)}.a-side-cards b{font:600 18px 'Lora',Georgia,serif}.a-side-cards small{color:var(--a-muted)}
.a-side-cards button[aria-checked=true]{background:var(--a-selected,#3a3217);border:2px solid var(--a-gold)}
.a-stepper{display:flex;align-items:center;gap:0;border:1px solid var(--a-line);border-radius:var(--a-radius);width:max-content}.a-stepper button{width:48px;height:48px;border:0;background:var(--a-raised);font-size:22px;border-radius:0}.a-stepper output{min-width:92px;text-align:center}
.a-actions{display:flex;gap:12px;margin-top:22px}.a-actions .a-btn{flex:1;min-height:52px}.a-actions.a-col{flex-direction:column}.a-warning{color:#f0c58a;margin:14px 0 0;font-size:14px}.a-warning[hidden],#a-opponent[hidden],#a-sides[hidden],#a-level-wrap[hidden]{display:none}
.a-dialog p{line-height:1.55}
/* help */
.a-wide-dialog{width:min(900px,calc(100vw - 24px))}.a-help{display:grid;grid-template-columns:minmax(200px,260px) 1fr;gap:20px;margin-top:14px;min-height:260px}.a-help-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.a-help-list button{width:100%;min-height:46px;text-align:left;border:1px solid var(--a-line-soft);border-radius:var(--a-radius);background:transparent;color:var(--a-ink);font-size:15px;padding:8px 14px}.a-help-list button[aria-current=true]{background:#3a3217;border-color:var(--a-gold);color:var(--a-gold-hi)}
.a-help-body{padding:20px 22px;border:1px solid var(--a-line-soft);border-radius:var(--a-radius);background:var(--a-raised)}.a-help-body h3{margin:0 0 12px;font:600 26px 'Lora',Georgia,serif;color:var(--a-gold-hi)}.a-help-body p{font-size:17px;line-height:1.6;margin:0}
#help-dialog .a-actions{align-items:center}#help-dialog .a-actions output{min-width:70px;text-align:center;color:var(--a-muted)}#help-dialog .dialog-close{position:absolute;right:10px;top:10px}
/* ============ DESKTOP (>= 1024) ============ */
@media (min-width:1024px){
  .a-tabbar{display:none}
  .a-home{left:16px;top:calc(var(--a-header-h) + 16px);bottom:16px;width:clamp(380px,36vw,520px);padding:26px 26px}
  .a-side{right:16px;top:calc(var(--a-header-h) + 8px);bottom:16px;width:clamp(300px,23vw,360px)}
  body>#view{top:var(--a-header-h)}
  body[data-screen=play]>#view{right:calc(clamp(300px,23vw,360px) + 32px)}
  .a-header-tools #a-settings-open{display:none}
  .a-header-tools #a-help-open{display:none}
  .a-header-tools{display:flex}
  .a-nav button{min-width:150px}
}
/* compact desktop 1024–1279: smaller margins, tool area scrolls instead of covering the board */
@media (min-width:1024px) and (max-width:1279.98px){
  .a-nav button{min-width:124px;padding:0 12px}.a-brand small{display:none}.a-home{padding:20px 20px}.a-home h1{font-size:34px}.a-card{min-height:96px}
  .a-side{overflow:auto}
}
@media (min-width:2200px){.a-home{width:560px}}
/* ============ MOBILE (< 1024) — Android layout ============ */
@media (max-width:1023.98px){
  :root{--a-header-h:56px;--a-tab-h:64px;--a-sheet-h:min(52dvh,348px)}
  .a-nav{display:none}.a-header{padding-inline:12px}.a-brand img{width:38px;height:38px}.a-brand b{font-size:20px}.a-brand small{display:none}
  .a-header-tools button{width:48px;height:48px}.a-header-tools #a-settings-open{display:none}
  body{overscroll-behavior:none}
  body>#view{top:var(--a-header-h)}
  .a-tabbar{position:fixed;z-index:4;left:0;right:0;bottom:0;display:flex;height:calc(var(--a-tab-h) + var(--a-safe-b));padding-bottom:var(--a-safe-b);background:linear-gradient(180deg,#0c1814f6,#070f0cfa);border-top:1px solid var(--a-line)}
  .a-tabbar button{flex:1;flex-direction:column;gap:2px;font-size:12px;min-height:48px}.a-tabbar .a-ic{width:30px;height:30px}
  body[data-screen=play] .a-tabbar{display:none}
  /* home: scene on top, actions on a sheet below it */
  body[data-screen=home]>#view{bottom:calc(min(54dvh,470px) + var(--a-tab-h) + var(--a-safe-b))}
  .a-home{left:10px;right:10px;bottom:calc(var(--a-tab-h) + var(--a-safe-b) + 8px);height:min(54dvh,470px);padding:14px 14px;gap:10px}
  .a-home h1{font-size:28px}.a-home .a-sub{font-size:13px}
  .a-home .a-primary{min-height:60px}.a-home .a-primary .a-label{font-size:21px}.a-discs i{width:36px;height:36px;font-size:19px}
  .a-row{min-height:52px}.a-card{min-height:76px;padding:8px 12px}.a-card img{width:56px;height:56px}.a-tile{min-height:60px;flex-direction:row;gap:10px}.a-tile .a-ic{width:28px;height:28px}
  /* play: players + tools on a bottom sheet */
  body[data-screen=play]>#view{bottom:var(--a-sheet-h)}
  .a-side{left:0;right:0;bottom:0;border-radius:var(--a-radius) var(--a-radius) 0 0;padding:10px 12px calc(10px + var(--a-safe-b));height:var(--a-sheet-h);overflow:auto}
  body[data-screen=play] .a-side{display:grid;grid-template-columns:1fr 1fr;grid-auto-rows:min-content;gap:8px}
  .a-player{padding:6px 8px;gap:8px}.a-avatar,.a-me .a-disc{width:40px;height:40px}.a-avatar img{width:32px;height:32px}.a-player .a-stack b{font-size:15px}.a-player .a-stack small{font-size:12px}.a-clock{min-width:62px;font-size:17px;padding:4px 6px}
  .a-turn{grid-column:1/-1;justify-self:center;margin:0}.a-history{grid-column:1/-1;min-height:64px;max-height:96px}.a-history summary{padding:6px 10px;font-size:15px}.a-history ol{padding-block:4px}
  .a-hint-status{grid-column:1/-1}.a-tools{grid-column:1/-1;grid-template-columns:repeat(4,1fr)}.a-tools #a-menu{display:flex}.a-tools #a-pause{grid-column:auto}.a-tools .a-btn{flex-direction:column;gap:2px;font-size:12px;min-height:56px;padding:6px 2px}.a-tools .a-ic{width:26px;height:26px}
  .a-wide{grid-column:1/-1;min-height:48px}
  .a-viewbar{left:50%;transform:translateX(-50%);top:calc(var(--a-header-h) + 6px);bottom:auto;padding:4px 8px;font-size:0}.a-viewbar span,.a-viewbar em{display:none}.a-viewbar button{font-size:12px;min-height:36px}
  .a-viewbar{display:none!important}
  .a-dialog{padding:18px 16px}.a-dialog h2{font-size:24px}
  .a-help{grid-template-columns:1fr}.a-help-list{flex-direction:row;overflow:auto;padding-bottom:4px}.a-help-list li{flex:none}.a-help-list button{white-space:nowrap}
  .a-help-body p{font-size:16px}
  .a-btn,.a-seg button,.a-side-cards button,.a-help-list button{min-height:48px}
}
/* landscape phones: keep the desktop-style split instead of stacking under a 390 px tall board */
@media (max-width:1023.98px) and (orientation:landscape) and (max-height:560px){
  :root{--a-header-h:48px;--a-tab-h:52px}
  .a-brand span{display:none}
  body[data-screen=home]>#view{bottom:0;right:min(52vw,440px)}
  .a-home{left:auto;right:8px;top:calc(var(--a-header-h) + 8px);bottom:calc(var(--a-tab-h) + var(--a-safe-b) + 8px);height:auto;width:min(50vw,430px)}
  body[data-screen=play]>#view{bottom:0;right:min(44vw,340px)}
  body[data-screen=play] .a-side{left:auto;right:0;top:var(--a-header-h);bottom:0;height:auto;width:min(44vw,340px);border-radius:0;grid-template-columns:1fr}
  .a-viewbar{left:12px;transform:none;bottom:8px}
  .a-history{max-height:none;min-height:56px}.a-history summary{display:none}.a-history ol{padding-block:2px;font-size:13px;line-height:1.5}
  body[data-screen=play] .a-side{gap:5px;padding:6px 8px}.a-player{padding:3px 8px}.a-avatar,.a-me .a-disc{width:34px;height:34px}.a-avatar img{width:26px;height:26px}.a-clock{font-size:15px;padding:2px 6px}.a-turn{padding:2px 14px;font-size:12px}
  .a-tools .a-btn{min-height:48px}.a-wide{min-height:44px}
  .a-tabbar button{flex-direction:row;gap:6px}
}
@media (prefers-reduced-motion:reduce){.a-btn{transition:none}}
/* ---- Binh pháp editor: board left, tree right on desktop (screen 06) ---- */
@media (min-width:1024px){
  #library-dialog.opening-dialog{width:min(1760px,calc(100vw - 24px));max-width:none;height:calc(100dvh - 24px);max-height:none;overflow:hidden;border-radius:var(--a-radius)}
  #opening-editor-view:not([hidden]){display:grid;height:100%;min-height:0;column-gap:16px;row-gap:8px;grid-template-columns:minmax(0,1fr) clamp(300px,34%,520px);
    grid-template-rows:auto auto minmax(120px,1fr) auto auto auto auto;
    grid-template-areas:"head head" "board nav" "board tree" "board sel" "board next" "board tip" "board act"}
  #opening-editor-view>.opening-editor-head{grid-area:head}
  #opening-editor-view>.opening-board-wrap{grid-area:board;min-height:0;display:flex;align-items:flex-start;justify-content:center}
  #opening-editor-view .opening-board-slot{width:100%;height:100%;max-height:none;aspect-ratio:auto}
  #opening-editor-view>.opening-selected-line{grid-area:sel}
  #opening-editor-view>.opening-next-moves,#opening-editor-view>#opening-next-moves{grid-area:next}
  #opening-editor-view>.opening-tree-navigation{grid-area:nav}
  #opening-editor-view>.opening-tree-shell{grid-area:tree;min-height:0;height:100%}
  #opening-editor-view .opening-tree-canvas{height:100%;min-height:0}
  #opening-editor-view>.opening-editor-tip{grid-area:tip}
  #opening-editor-view>.opening-editor-actions{grid-area:act}
  #opening-library-view{overflow:auto;max-height:100%}
  #library-dialog.opening-expanded #opening-editor-view:not([hidden]){grid-template-columns:1fr;grid-template-rows:auto auto minmax(0,1fr) auto auto auto;grid-template-areas:"head" "nav" "tree" "sel" "next" "act"}
  #library-dialog.opening-expanded .opening-editor-tip{display:none}
  .opening-training-hud{grid-template-columns:minmax(0,1fr) clamp(280px,28vw,380px);grid-template-rows:minmax(0,1fr);gap:20px}
  .opening-training-board{width:100%;height:100%;max-width:none}
  .opening-training-card{width:100%;height:100%;max-height:100%;display:flex;flex-direction:column;gap:8px;min-height:0}
  .opening-training-actions{margin-top:auto}
}
/* settings dialog: A rows for the options the web really has (sound on/off) */
#settings-dialog{width:min(920px,calc(100vw - 24px));max-height:calc(100dvh - 24px)}
.a-settings-extra h3{margin:22px 0 8px;font:600 13px inherit;letter-spacing:.12em;color:var(--a-gold-dim)}
.a-switch,.a-info{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:60px;padding:8px 16px;border:1px solid var(--a-line-soft);border-radius:var(--a-radius);background:#0d1914;margin-bottom:8px}
.a-switch span{display:flex;flex-direction:column;font-size:16px}.a-switch small{color:var(--a-muted);font-size:12.5px;margin-top:2px}
.a-switch input{appearance:none;width:52px;height:28px;border-radius:14px;background:#23302a;border:1px solid var(--a-line);position:relative;cursor:pointer;flex:none;transition:background .15s}
.a-switch input::after{content:'';position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:var(--a-muted);transition:transform .15s,background .15s}
.a-switch input:checked{background:var(--a-gold)}.a-switch input:checked::after{transform:translateX(24px);background:var(--a-on-gold)}
.a-switch input:focus-visible{outline:2px solid var(--a-gold-hi);outline-offset:2px}
.a-info b{color:var(--a-gold);font-weight:500}
@media (prefers-reduced-motion:reduce){.a-switch input,.a-switch input::after{transition:none}}

/* result banner + its buttons own the bottom of the board */
body.finished .a-viewbar,body.result-cinematic .a-viewbar{display:none}

:root{--a-corner-tl:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 40 40' width='40' height='40'%3E%3Cg transform='translate(0 0)' fill='none' stroke='%23dbc07c' stroke-width='1.8'%3E%3Cpath d='M3 3H34M3 3V34'/%3E%3Cpath stroke-width='1' stroke='%23a88c52' d='M8 8H26M8 8V26M26 8C34 12 12 34 8 26'/%3E%3Cpath fill='%23dbc07c' stroke='none' d='M3 -1L7 3L3 7L-1 3Z'/%3E%3C/g%3E%3C/svg%3E");--a-corner-tr:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 40 40' width='40' height='40'%3E%3Cg transform='matrix(-1 0 0 1 40 0)' fill='none' stroke='%23dbc07c' stroke-width='1.8'%3E%3Cpath d='M3 3H34M3 3V34'/%3E%3Cpath stroke-width='1' stroke='%23a88c52' d='M8 8H26M8 8V26M26 8C34 12 12 34 8 26'/%3E%3Cpath fill='%23dbc07c' stroke='none' d='M3 -1L7 3L3 7L-1 3Z'/%3E%3C/g%3E%3C/svg%3E");--a-corner-bl:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 40 40' width='40' height='40'%3E%3Cg transform='matrix(1 0 0 -1 0 40)' fill='none' stroke='%23dbc07c' stroke-width='1.8'%3E%3Cpath d='M3 3H34M3 3V34'/%3E%3Cpath stroke-width='1' stroke='%23a88c52' d='M8 8H26M8 8V26M26 8C34 12 12 34 8 26'/%3E%3Cpath fill='%23dbc07c' stroke='none' d='M3 -1L7 3L3 7L-1 3Z'/%3E%3C/g%3E%3C/svg%3E");--a-corner-br:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 40 40' width='40' height='40'%3E%3Cg transform='matrix(-1 0 0 -1 40 40)' fill='none' stroke='%23dbc07c' stroke-width='1.8'%3E%3Cpath d='M3 3H34M3 3V34'/%3E%3Cpath stroke-width='1' stroke='%23a88c52' d='M8 8H26M8 8V26M26 8C34 12 12 34 8 26'/%3E%3Cpath fill='%23dbc07c' stroke='none' d='M3 -1L7 3L3 7L-1 3Z'/%3E%3C/g%3E%3C/svg%3E")}
/* Khung vàng chạm khắc ở bốn góc (ảnh A): lớp nền, không chặn chuột. */
.a-panel,.a-dialog,#loading .loading-card,#help-dialog,#settings-dialog,.opening-dialog,.opening-form-dialog,.opening-suggestions-dialog,#side-dialog{background-image:var(--a-corner-tl),var(--a-corner-tr),var(--a-corner-bl),var(--a-corner-br),linear-gradient(180deg,#0f1d18f4,#0b1612f7)!important;background-position:6px 6px,calc(100% - 6px) 6px,6px calc(100% - 6px),calc(100% - 6px) calc(100% - 6px),0 0!important;background-size:40px 40px,40px 40px,40px 40px,40px 40px,100% 100%!important;background-repeat:no-repeat!important;border:1.5px solid #a88c52!important;border-radius:4px!important;box-shadow:inset 0 0 0 5px #0b1612,inset 0 0 0 6px #c8a96258,0 24px 70px #000c}
dialog::backdrop{background:linear-gradient(#070d0bcf,#070d0bcf),url(assets/approved/mountain-backdrop.webp) center/cover!important}
/* header: cảnh núi + trăng làm nền như ảnh */
.a-header{background:linear-gradient(90deg,#070f0cf2 0%,#070f0cc0 45%,#070f0c70 100%),url(assets/approved/mountain-backdrop.webp) 60% 24%/cover!important;border-bottom:2px solid #a88c52!important;box-shadow:0 1px 0 #c8a96258,inset 0 -3px 0 #0b1612}
.a-tabbar{background:linear-gradient(180deg,#0c1814f6,#070f0cfa)!important;border-top:2px solid #a88c52!important}

#loading{background:linear-gradient(#070d0bd8,#070d0bd8),url(assets/approved/mountain-backdrop.webp) center/cover!important}
#loading .loading-card{padding:34px 40px!important;text-align:center;color:var(--a-ink)}
#loading .loading-card h2{font:600 34px 'Lora',Georgia,serif;color:var(--a-gold-hi);margin:6px 0}
#loading progress{width:min(360px,70vw);accent-color:#dbc07c}
#reload{margin-top:14px;min-height:48px;padding:8px 22px;border:1.6px solid var(--a-gold);background:#17382e;color:var(--a-gold-hi);border-radius:4px}

/* Binh pháp (ảnh 05): hình cây thu nhỏ trong thẻ + công tắc "Áp dụng khi đấu máy" */
.opening-tree-card{grid-template-columns:132px 1fr auto}
.opening-tree-card .opening-tree-card-cover{width:132px;height:92px;border-radius:8px;background:#0d1e18;box-shadow:inset 0 0 0 1px #bfa36955;padding:4px;display:block}
.opening-tree-card-action .opening-use-switch{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:11px;color:#e8ddbd;min-height:44px;padding:0 4px;cursor:pointer}
@media(max-width:1023.98px){.opening-tree-card{grid-template-columns:84px 1fr}.opening-tree-card .opening-tree-card-cover{width:84px;height:60px}.opening-tree-card-action .opening-use-switch{grid-column:1/-1}}

/* Book thiết bị (ảnh 15): bảng # · Bật · Tên · Loại · Thứ tự · Xóa */
#device-book-list{display:block}
.device-book-head,.device-book-row{display:grid;grid-template-columns:34px 56px minmax(0,1fr) 110px 84px 44px;align-items:center;gap:8px;padding:6px 10px}
.device-book-head{font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--a-muted);border-bottom:1px solid var(--a-line-soft)}
.device-book-row{border-bottom:1px solid var(--a-line-soft)}
.device-book-num{color:var(--a-muted);font-size:13px}
.device-book-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px}
.device-book-chip{justify-self:start;padding:3px 9px;border:1px solid var(--a-line);border-radius:6px;font-size:11px;color:#f1d99a;background:#10241c}
.device-book-order{display:flex;gap:4px}
.device-book-row button{min-height:36px;min-width:36px;padding:0 8px}
.device-book-toggle input{appearance:none;width:44px;height:24px;border-radius:12px;background:#23302a;border:1px solid var(--a-line);position:relative;cursor:pointer}
.device-book-toggle input::after{content:"";position:absolute;top:2px;left:3px;width:18px;height:18px;border-radius:50%;background:#e8e0c8;transition:left .15s}
.device-book-toggle input:checked{background:#2f6a52}.device-book-toggle input:checked::after{left:21px}
@media(max-width:1023.98px){
  .device-book-head,.device-book-row{grid-template-columns:24px 44px minmax(0,1fr) 44px;gap:6px}
  .device-book-head span:nth-child(4),.device-book-head span:nth-child(5),.device-book-chip{display:none}
  .device-book-order{grid-column:3;grid-row:2;justify-self:start}
  .device-book-order button{min-width:44px;min-height:44px}
  .device-book-row>button:last-child{grid-column:4;grid-row:1/3}
}

/* Cài đặt ván chơi (ảnh 11) */
.a-field small{display:block;color:var(--a-muted);font-size:12px;margin-top:2px}
.a-stepper{display:inline-flex;align-items:center;gap:10px}.a-stepper b{min-width:2ch;text-align:center;font-size:18px;color:#ffe3a0}
.a-stepper button{min-width:44px;min-height:44px}
.a-seg-inline{display:inline-flex;gap:6px}.a-seg-inline button{min-height:44px;padding:0 14px}
.a-seg-inline button[aria-pressed=true]{border-color:var(--a-gold);background:#274d3d;color:#ffe3a0}

/* Panel "Thông tin cây" (ảnh 05): chỉ ở bố cục lớn; nhỏ hơn thì ẩn để giữ danh sách một cột */
.opening-library-body{display:block}
.opening-tree-info{display:none}
@media(min-width:1024px){
  .opening-library-body{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:14px;align-items:start}
  .opening-tree-info:not([hidden]){display:block;position:sticky;top:0;padding:16px;border:1px solid var(--a-line);border-radius:var(--a-radius);background:#0d1914}
  .opening-tree-info h3{margin:0 0 10px;font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--a-muted)}
  .opening-tree-info strong{display:block;font:20px Georgia,serif;color:#ffe3a0;margin-bottom:6px}
  .opening-tree-info p{margin:0 0 12px;color:#aeb9aa;font-size:12px;line-height:1.5}
  .opening-tree-info-diagram{height:170px;border-radius:8px;background:#0a1511;box-shadow:inset 0 0 0 1px #bfa36944;padding:6px;margin-bottom:12px}
  .opening-tree-info dl{display:grid;grid-template-columns:auto 1fr;gap:6px 12px;margin:0 0 12px;font-size:13px}.opening-tree-info dt{color:var(--a-muted)}.opening-tree-info dd{margin:0;text-align:right}
  .opening-tree-info button{width:100%;min-height:44px}
}

/* Thông tin book (ảnh 15) */
.device-book-row[data-selected=true]{background:#14301f;box-shadow:inset 0 0 0 1px var(--a-gold)}
.device-book-row{cursor:pointer}
.device-book-info{margin-top:12px;padding:14px 16px;border:1px solid var(--a-line);border-radius:var(--a-radius);background:#0d1914}
.device-book-info h4{margin:0 0 10px;font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--a-muted)}
.device-book-info dl{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;margin:0;font-size:13px}.device-book-info dt{color:var(--a-muted)}.device-book-info dd{margin:0;overflow-wrap:anywhere}

/* Tab Học (store-v1 §6.2) */
.kl-learn .kl-status{min-height:1em;margin:4px 0 0;opacity:.75;font-size:13px}
.kl-sec{margin-top:18px}.kl-sec h3{margin:0 0 10px;font-size:17px;letter-spacing:.02em}
.kl-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.kl-card{display:flex;flex-direction:column;gap:8px;text-align:left;padding:0;border:1px solid var(--a-line-soft);border-radius:12px;background:transparent;color:inherit;overflow:hidden;cursor:pointer}
.kl-card img,.kl-cover-blank{width:100%;aspect-ratio:16/9;object-fit:cover;display:block;background:linear-gradient(135deg,#1c2e27,#0f1b17)}
.kl-card-body{display:flex;flex-direction:column;gap:4px;padding:0 12px 12px}.kl-card small{opacity:.8}
.kl-meta{font-size:12px;opacity:.7}.kl-empty{opacity:.7;margin:0}
.kl-course{border:1px solid var(--a-line-soft);border-radius:12px;padding:12px 14px;margin-bottom:12px}
.kl-course-head{display:flex;justify-content:space-between;gap:10px;align-items:baseline;flex-wrap:wrap}
.kl-lessons{margin:8px 0 0;padding-left:20px}.kl-lessons li{margin:4px 0}
.kl-lesson{display:flex;justify-content:space-between;gap:10px;width:100%;padding:6px 8px;border:0;border-radius:8px;background:transparent;color:inherit;text-align:left;cursor:pointer;opacity:.6}
.kl-lesson.kl-open{opacity:1}.kl-lesson:hover{background:#ffffff10}
.kl-buy-note{margin:8px 0 0;font-size:13px;opacity:.75}
.kl-player{margin-top:12px;border:1px solid var(--a-line-soft);border-radius:12px;overflow:hidden;background:#000}
.kl-player-bar{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:8px 10px;background:#0b1612;color:var(--a-ink)}
.kl-stage{position:relative;aspect-ratio:16/9}.kl-stage video,.kl-stage iframe{position:absolute;inset:0;width:100%;height:100%;border:0;background:#000}
html[data-theme="liquid-light"] .kl-player-bar{background:#f4f6f3;color:#1d2a24}
html[data-theme="liquid-light"] .kl-lesson:hover{background:#0000000a}
/* Xếp thế để chơi (chủ dự án 2026-11-01): khung nổi cạnh bàn 3D thật (quân, bàn của ván); chỉ chứa nút và ô FEN. */
.a-setup-panel{position:fixed;z-index:30;right:20px;top:50%;transform:translateY(-50%);width:min(340px,calc(100vw - 24px));padding:18px 18px 16px;background:linear-gradient(180deg,#0f1d18,#0b1612);border:1px solid var(--a-line);border-radius:var(--a-radius);color:var(--a-ink);box-shadow:0 18px 50px #000a}
.a-setup-panel[hidden]{display:none}
.a-setup-panel h2{margin:0 0 4px;text-align:center;font:600 24px 'Lora',Georgia,serif;color:var(--a-gold-hi)}.a-setup-panel .a-sub{text-align:center;font-size:13px;margin:0 0 10px}
.a-setup-tools{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:8px 0}.a-setup-tools .a-btn{min-height:42px;padding:0 10px;font-size:14px}.a-setup-tools #a-setup-side{grid-column:1/-1}
.a-setup-fen{display:flex;gap:8px;align-items:center}.a-setup-fen span{font-size:13px;color:var(--a-muted)}.a-setup-fen input{flex:1;min-width:0;min-height:40px;padding:0 10px;border-radius:10px;border:1px solid var(--a-line);background:#0b1411;color:var(--a-ink);font:12px ui-monospace,Menlo,monospace}
.a-setup-status{min-height:20px;margin:8px 0;font-size:14px;text-align:center}.a-setup-status.a-bad{color:#ff7a6a}
.a-setup-panel .a-actions{margin-top:6px}
/* Trong lúc xếp thế: ẩn khung chơi/trang chủ để bàn và khay quân lộ rõ. */
body.setup-mode #a-side,body.setup-mode #a-home,body.setup-mode #a-header,body.setup-mode #a-tabbar,body.setup-mode #a-viewbar,body.setup-mode #a-menu-handle{visibility:hidden}
@media (max-width:1023.98px){.a-setup-panel{top:auto;bottom:10px;right:50%;transform:translateX(50%);padding:12px}.a-setup-panel .a-sub{display:none}.a-setup-tools{grid-template-columns:repeat(3,1fr)}.a-setup-tools #a-setup-side{grid-column:auto}.a-setup-tools .a-btn{min-height:40px;font-size:13px}}