@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Shippori+Mincho:wght@500;600;700&display=swap');
:root{color-scheme:dark;--ink:#171714;--ink-soft:#22221d;--paper:#f1eadb;--paper-muted:#c9c0af;--wood:#b9783f;--wood-dark:#71411f;--vermilion:#b84b38;--line:rgba(241,234,219,.14);--line-strong:rgba(241,234,219,.28);--muted:#9d988b;--shadow:0 24px 60px rgba(0,0,0,.28);font-family:'DM Sans',system-ui,sans-serif}*{box-sizing:border-box}html,body{min-height:100%;margin:0}body{background:var(--ink);color:var(--paper);-webkit-font-smoothing:antialiased}button,input,select,textarea{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--paper);outline-offset:3px}#app{min-height:100vh;padding:20px}.shell,.landing-shell{max-width:1240px;margin:auto}.shell{display:grid;gap:24px}.topbar{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 4px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;background:none;border:0;color:inherit;padding:0;text-align:left}.brand-mark{display:grid;place-items:center;width:38px;height:38px;border:1px solid var(--wood);border-radius:50%;color:var(--wood);font-family:'Shippori Mincho',serif;font-size:22px}.brand h1{font-family:'Shippori Mincho',serif;font-size:1.45rem;margin:0;letter-spacing:.04em}.brand p{margin:2px 0 0;color:var(--muted);font-size:.75rem}.top-actions{display:flex;align-items:center;gap:8px}.nav-toggle{display:none;place-items:center;gap:4px;width:42px;height:42px;background:var(--ink-soft);color:var(--paper);border:1px solid var(--line-strong);border-radius:3px;padding:9px;transition:.2s ease}.nav-toggle:hover{border-color:var(--wood)}.hamburger-line{display:block;width:20px;height:2px;background:currentColor;border-radius:2px;transition:transform .2s ease,opacity .2s ease}.topbar.is-nav-open .nav-toggle{border-color:var(--wood);color:var(--wood)}.topbar.is-nav-open .hamburger-line:nth-child(1){transform:translateY(6px) rotate(45deg)}.topbar.is-nav-open .hamburger-line:nth-child(2){opacity:0}.topbar.is-nav-open .hamburger-line:nth-child(3){transform:translateY(-6px) rotate(-45deg)}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 16px;background:transparent;color:var(--paper);border:1px solid var(--line-strong);border-radius:3px;font-weight:600;transition:.2s ease}.btn:hover:not(:disabled){border-color:var(--paper);transform:translateY(-1px)}.btn.primary{background:var(--vermilion);border-color:var(--vermilion);color:var(--paper)}.btn.primary:hover:not(:disabled){background:#ca5a45}.btn.secondary{border-color:transparent;color:var(--paper-muted)}.btn.danger{background:transparent;border-color:var(--vermilion);color:#e48775}.btn-lg{padding:13px 22px}.layout{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(320px,.8fr);gap:24px;align-items:start}.board-shell{display:grid;gap:12px}.player-strip{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;border:1px solid var(--line);background:var(--ink-soft)}.player-strip.is-turn{border-color:var(--wood)}.player-card{display:flex;align-items:center;gap:12px}.player-avatar{display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:#10100f;border:1px solid var(--line-strong);font-size:18px}.player-avatar.is-local{background:var(--paper);color:var(--ink)}.player-name{font-weight:600}.player-sub,.hint{color:var(--muted);font-size:.78rem}.player-sub{display:flex;gap:6px;margin-top:3px}.captured-badge{color:var(--wood)}.player-clock{font-family:monospace;color:var(--muted)}.player-clock.is-active{color:var(--paper)}.board-frame{padding:clamp(8px,2vw,22px);background:var(--wood-dark);box-shadow:var(--shadow)}.board-wrap{display:flex;justify-content:center;overflow:auto}.goban{width:min(100%,820px);padding:clamp(10px,2vw,20px);background:var(--wood);border:1px solid #d09250}.goban-canvas{display:block;width:100%;aspect-ratio:1}.panel{background:var(--ink-soft);border:1px solid var(--line)}.sidebar{display:flex;flex-direction:column;max-height:calc(100vh - 100px)}.sidebar-tabs{display:grid;grid-template-columns:1fr 1fr;border-bottom:1px solid var(--line)}.sidebar-tabs button{padding:15px;background:none;border:0;color:var(--muted);font-weight:600}.sidebar-tabs button.is-active{color:var(--paper);box-shadow:inset 0 -2px var(--vermilion)}.sidebar-banner{display:flex;justify-content:space-between;padding:18px;border-bottom:1px solid var(--line)}.sidebar-banner .label,.eyebrow{color:var(--wood);font-size:.7rem;letter-spacing:.15em;text-transform:uppercase;font-weight:700}.sidebar-banner strong{display:block;margin-top:5px;font-family:'Shippori Mincho',serif;font-size:1.25rem}.turn-badge{padding:5px 10px;border:1px solid var(--wood);color:var(--wood);font-size:.72rem}.sidebar-scroll{overflow:auto;padding:16px;display:grid;gap:14px}.sidebar-footer{display:grid;gap:8px;padding:16px;border-top:1px solid var(--line)}.panel-card,.result{padding:18px}.panel-card h2,.panel-card h3,.result h3{font-family:'Shippori Mincho',serif;margin:0 0 16px}.field-grid,.info-list,.move-log{display:grid;gap:10px}.field-grid.two{grid-template-columns:1fr 1fr}.field{display:grid;gap:6px}.field label{font-size:.8rem;color:var(--muted)}.field input,.field select,textarea{width:100%;padding:11px 12px;background:var(--ink);border:1px solid var(--line-strong);color:var(--paper);border-radius:2px}.actions{display:flex;flex-wrap:wrap;gap:8px}.info-item{display:flex;justify-content:space-between;padding:10px 12px;border-bottom:1px solid var(--line);font-size:.85rem}.info-item strong{color:var(--wood)}.move-head,.move-row{display:grid;grid-template-columns:2.5rem 1fr 1fr;gap:8px;align-items:center}.move-head{color:var(--muted);font-size:.7rem;padding-bottom:8px;border-bottom:1px solid var(--line)}.move-row{padding:8px;font-size:.85rem}.move-row.is-alt{background:rgba(241,234,219,.04)}.move-index,.move-empty{color:var(--muted)}.move-entry{display:inline-flex;flex-direction:column}.move-entry small{color:var(--wood)}.move-empty-state{padding:14px;text-align:center;color:var(--muted);border:1px dashed var(--line-strong)}.result{border-left:3px solid var(--wood)}.mobile-action-bar{display:none}.landing-content{display:grid;gap:80px;padding:70px 0 24px}.hero-section{display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:48px;min-height:500px}.hero-title,.welcome-row h2,.cta-banner h2{font-family:'Shippori Mincho',serif;font-weight:600;line-height:1.08;letter-spacing:-.03em}.hero-title{font-size:clamp(3.2rem,7vw,6.8rem);margin:18px 0 24px}.hero-title em{font-style:normal;color:var(--wood)}.hero-subtitle{max-width:570px;color:var(--paper-muted);font-size:1.08rem;line-height:1.7;margin:0 0 30px}.hero-actions{display:flex;flex-wrap:wrap;gap:10px}.hero-goban{width:min(100%,390px);aspect-ratio:1;background:var(--wood);padding:14%;position:relative;justify-self:end;box-shadow:22px 22px 0 var(--wood-dark)}.mini-grid{height:100%;display:grid;grid-template-columns:repeat(5,1fr);border:1px solid rgba(23,23,20,.7);background:linear-gradient(90deg,transparent 49%,rgba(23,23,20,.35) 50%,transparent 51%),linear-gradient(0deg,transparent 49%,rgba(23,23,20,.35) 50%,transparent 51%);background-size:25% 100%,100% 25%}.mini-dot{border:1px solid rgba(23,23,20,.35)}.mini-stone{margin:28%;border-radius:50%;background:var(--ink);box-shadow:2px 3px 3px #71411f}.hero-seal{position:absolute;right:8%;bottom:6%;font-family:serif;font-size:.7rem;color:var(--vermilion);writing-mode:vertical-rl}.welcome-row{display:grid;grid-template-columns:1fr 1fr;gap:40px;border-top:1px solid var(--line);padding-top:32px}.welcome-row h2{font-size:clamp(2rem,4vw,3.4rem);margin:12px 0}.welcome-copy{color:var(--paper-muted);line-height:1.8;max-width:430px;margin:30px 0 0}.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line)}.feature-card{padding:28px;background:var(--ink)}.feature-kicker{color:var(--vermilion);font-family:monospace;font-size:.75rem}.feature-card h3{font-family:'Shippori Mincho',serif;font-size:1.5rem;margin:38px 0 12px}.feature-card p{color:var(--muted);line-height:1.6;margin:0}.cta-banner{text-align:center;padding:70px 20px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.cta-banner h2{font-size:clamp(2.5rem,5vw,4.5rem);margin:14px 0}.cta-banner p:not(.eyebrow){color:var(--muted);margin:0 auto 26px}.landing-footer{display:flex;justify-content:space-between;padding:20px 0;color:var(--muted);font-size:.78rem}.landing-footer span{font-family:'Shippori Mincho',serif;color:var(--paper);font-size:1.1rem}.landing-footer p{margin:0}.hidden{display:none!important}@media(max-width:1024px){.layout{grid-template-columns:1fr}.sidebar{max-height:none}}@media(max-width:700px){#app{padding:12px}.topbar{padding:12px 0;flex-wrap:wrap}.nav-toggle{display:block}.top-actions{display:none;width:100%;flex-direction:column;padding-top:12px;border-top:1px solid var(--line)}.top-actions.is-open{display:flex}.top-actions .btn{width:100%}.landing-content{padding:42px 0 10px;gap:56px}.hero-section{grid-template-columns:1fr;gap:42px;min-height:0}.hero-goban{justify-self:start;width:76%;box-shadow:12px 12px 0 var(--wood-dark);order:-1}.hero-title{font-size:clamp(3rem,16vw,5rem)}.hero-subtitle{font-size:.98rem}.hero-actions .btn{flex:1}.welcome-row{grid-template-columns:1fr;gap:0}.welcome-copy{margin:0}.features-grid{grid-template-columns:1fr}.feature-card h3{margin-top:20px}.landing-footer{display:block}.landing-footer p{margin-top:6px}.board-frame{padding:7px}.player-strip{padding:10px}.player-name{font-size:.88rem}.sidebar{margin-top:8px}.mobile-action-bar{display:flex;gap:8px}.mobile-action-bar .btn{flex:1;min-width:0;padding-inline:8px}.field-grid.two{grid-template-columns:1fr 1fr}}
/* Đồng nhất khu vực chơi với landing page */
.layout{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(320px,.65fr);gap:24px;align-items:start}
.panel{background:var(--ink-soft);border:1px solid var(--line);border-radius:6px;box-shadow:var(--shadow)}
.panel-card{padding:20px}.sidebar{overflow:hidden}.sidebar-tabs{display:flex;border-bottom:1px solid var(--line)}.sidebar-tabs button{flex:1;padding:14px 12px;background:transparent;border:0;border-bottom:2px solid transparent;color:var(--muted);font-weight:700}.sidebar-tabs button.is-active{color:var(--paper);border-bottom-color:var(--vermilion)}.sidebar-banner{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 20px;background:rgba(185,120,63,.12);border-bottom:1px solid var(--line)}.sidebar-scroll{display:grid;gap:14px;padding:14px}.panel-card h2,.panel-card h3{margin:0 0 14px;font-family:'Shippori Mincho',serif;color:var(--paper)}.field-grid{display:grid;gap:12px}.field-grid.two{grid-template-columns:1fr 1fr}.field{display:grid;gap:6px}.field label,.label{color:var(--muted);font-size:.78rem;font-weight:700;letter-spacing:.04em}.field input,.field select{width:100%;min-height:42px;padding:9px 11px;background:var(--ink);border:1px solid var(--line-strong);border-radius:3px;color:var(--paper)}.actions{display:flex;gap:8px;flex-wrap:wrap}.hint{color:var(--muted);font-size:.84rem;line-height:1.5}.info-list{display:grid;gap:8px}.info-item{display:flex;justify-content:space-between;gap:12px;padding-bottom:8px;border-bottom:1px solid var(--line);color:var(--muted)}.info-item strong{color:var(--paper)}.danger{border-color:rgba(184,75,56,.65);color:#e59180}
/* Go board and responsive interaction refinements */
.board-shell{min-width:0}
.board-frame{background:var(--wood-dark);border:1px solid var(--line-strong);box-shadow:0 18px 42px rgba(0,0,0,.34),inset 0 0 0 8px rgba(34,25,19,.24);padding:clamp(10px,1.8vw,22px);border-radius:6px}
.board-wrap{width:min(100%,720px);margin:0 auto;aspect-ratio:1;}
.goban{width:100%;height:100%;background:var(--wood);border-radius:3px;overflow:hidden;box-shadow:inset 0 0 0 1px rgba(255,245,220,.25)}
.goban-canvas{display:block;width:100%;height:100%;touch-action:manipulation}
.game-action-bar{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:14px}
.game-action-bar .btn{min-width:110px}
.nav-toggle{position:relative;z-index:5;display:none;flex:0 0 auto;min-width:44px;min-height:44px;place-items:center;color:var(--paper);background:var(--ink-soft);border-color:var(--line-strong);font-size:1.35rem}
.sidebar-footer{display:none!important}
@media(max-width:760px){
  #app{padding:10px}
  .topbar{position:relative;gap:10px;padding:10px 0}
  .nav-toggle{display:grid!important}
  .top-actions{display:none}
  .top-actions.is-open{display:flex;position:absolute;z-index:4;top:calc(100% + 8px);right:0;left:0;flex-direction:column;align-items:stretch;padding:10px;background:var(--ink-soft);border:1px solid var(--line-strong);box-shadow:var(--shadow)}
  .top-actions .btn{width:100%;justify-content:flex-start}
  .layout{display:flex;flex-direction:column;gap:14px}
  .board-frame{padding:8px;border-radius:4px;box-shadow:0 12px 28px rgba(0,0,0,.3),inset 0 0 0 4px rgba(34,25,19,.24)}
  .board-wrap{width:100%;max-width:none}
  .player-strip{padding-inline:4px}
  .player-name{font-size:.82rem}
  .player-clock{font-size:1rem}
  .game-action-bar{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:10px}
  .game-action-bar .btn{min-width:0;width:100%;padding-inline:8px}
  .game-action-bar .btn.primary{grid-column:1 / -1;order:-1}
}
@media(min-width:761px){.game-action-bar{padding:0 8px 4px}.board-shell .game-action-bar{max-width:720px;margin-inline:auto}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;scroll-behavior:auto!important}}

/* Result Modal and Banner Styling */
.result-banner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 16px;background:var(--ink-soft);border:1px solid var(--line-strong);border-left:3px solid var(--wood);border-radius:6px;box-shadow:var(--shadow)}
.result-banner-info{display:flex;flex-direction:column;gap:5px;min-width:0}.result-banner-title{display:flex;align-items:center;gap:8px;color:var(--paper);font-family:'Shippori Mincho',serif;font-size:1rem}.result-banner-mark{display:grid;place-items:center;width:24px;height:24px;border:1px solid var(--wood);border-radius:50%;color:var(--wood);font-size:.85rem;flex:0 0 auto}.result-banner-subtitle{color:var(--wood);font-family:'DM Sans',system-ui,sans-serif;font-size:.78rem;font-weight:600}.result-banner-sub{color:var(--muted);font-size:.8rem;line-height:1.5}
.modal-overlay{position:fixed;inset:0;z-index:1000;display:flex;align-items:center;justify-content:center;padding:16px;background:rgba(10,10,9,.82);backdrop-filter:blur(5px);animation:fadeIn .2s ease-out}.modal-card{width:min(100%,520px);background:var(--ink-soft);border:1px solid var(--line-strong);border-radius:6px;box-shadow:var(--shadow);display:flex;flex-direction:column;overflow:hidden;animation:scaleUp .2s ease-out}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--line);background:rgba(185,120,63,.06)}.modal-header h2{margin:0;font-family:'Shippori Mincho',serif;font-size:1.3rem;color:var(--paper)}.modal-close{background:none;border:1px solid transparent;color:var(--muted);font-size:1.1rem;padding:5px 8px;border-radius:3px}.modal-close:hover{color:var(--paper);border-color:var(--line-strong);background:var(--ink)}
.modal-body{padding:20px;display:flex;flex-direction:column;gap:16px}.result-badge{display:flex;flex-direction:column;align-items:center;padding:18px;border:1px solid var(--wood);border-radius:4px;text-align:center;background:rgba(185,120,63,.1)}.result-badge.is-win,.result-badge.is-lose,.result-badge.is-draw{background:rgba(185,120,63,.1);border-color:var(--wood)}.result-badge-title{font-family:'Shippori Mincho',serif;font-size:1.65rem;font-weight:700;color:var(--paper)}.result-badge-sub{margin-top:4px;font-size:.88rem;color:var(--paper-muted)}.result-reason-text{margin:0;text-align:center;color:var(--muted);font-size:.88rem;line-height:1.5}.score-breakdown{display:grid;grid-template-columns:1fr 1fr;gap:12px}.score-col{display:flex;flex-direction:column;gap:8px;padding:12px;background:var(--ink);border:1px solid var(--line);border-radius:4px;font-size:.82rem}.score-col.is-winner-col{border-color:var(--wood);box-shadow:0 0 0 1px var(--wood)}.score-col-header{display:flex;justify-content:space-between;align-items:center;padding-bottom:6px;border-bottom:1px solid var(--line);font-weight:600}.score-col-header strong{color:var(--wood);font-size:.95rem}.score-col-item{display:flex;justify-content:space-between;color:var(--muted)}.result-diff-box{display:flex;justify-content:space-between;align-items:center;padding:11px 14px;background:rgba(185,120,63,.08);border:1px dashed var(--wood);border-radius:4px;font-size:.9rem}.result-diff-box strong{color:var(--paper)}.modal-actions{display:flex;justify-content:flex-end;gap:10px;padding:16px 20px;border-top:1px solid var(--line);background:rgba(0,0,0,.12)}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}@keyframes scaleUp{from{transform:scale(.97);opacity:0}to{transform:scale(1);opacity:1}}
@media(max-width:560px){.result-banner{align-items:stretch;flex-direction:column}.result-banner .btn{width:100%}.score-breakdown{grid-template-columns:1fr}.modal-actions{flex-direction:column-reverse}.modal-actions .btn{width:100%}}