:root {
  color-scheme: light;
  --bg:#f4f5f7;
  --panel:#ffffff;
  --text:#1f2937;
  --muted:#6b7280;
  --line:#d8dde6;
  --shadow:0 18px 50px rgba(20,30,50,.12);
}
*{box-sizing:border-box} html,body{margin:0;min-height:100%;font-family:Inter,"Noto Sans JP",system-ui,sans-serif;background:var(--bg);color:var(--text)}
button,input{font:inherit} button{cursor:pointer;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 14px;color:var(--text)} button:hover{filter:brightness(.98)}
.screen{display:none;min-height:100vh;padding:24px}.screen.active{display:flex;align-items:center;justify-content:center}.panel{background:var(--panel);box-shadow:var(--shadow);border:1px solid #e7eaf0;border-radius:24px;padding:30px;width:min(860px,100%)}
.hero{text-align:center}.eyebrow{font-size:12px;letter-spacing:.12em;font-weight:800;color:var(--muted);margin:0 0 8px}.hero h1{font-size:clamp(38px,8vw,74px);margin:0;letter-spacing:-.04em}.lead{color:var(--muted);margin:12px 0 28px}.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.mode-card{min-height:210px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;font-size:22px}.mode-card small{font-size:14px;color:var(--muted)}
.mode-icon{width:80px;height:80px;display:block}.square-icon{background:conic-gradient(#2f74d0 0 25%,#f2c230 0 50%,#dc3a43 0 75%,#2ca66f 0);border-radius:18px;transform:rotate(8deg)}.hex-icon{background:conic-gradient(#2f74d0 0 25%,#f2c230 0 50%,#dc3a43 0 75%,#2ca66f 0);clip-path:polygon(25% 7%,75% 7%,100% 50%,75% 93%,25% 93%,0 50%)}
.setup-panel{max-width:620px}.setup-panel h2{font-size:30px;margin:4px 0 22px}.back-btn{margin-bottom:20px}.count-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.count-grid button{padding:22px 10px;font-size:24px;font-weight:800}.note{color:var(--muted);line-height:1.7;min-height:48px}.name-inputs{display:grid;gap:12px;margin:18px 0}.name-row{display:flex;align-items:center;gap:12px}.color-dot{width:18px;height:18px;border-radius:999px;flex:none}.name-row input{width:100%;padding:13px 14px;border:1px solid var(--line);border-radius:10px}.primary{background:#111827;color:#fff;border-color:#111827;font-weight:800}
.game-screen.active{display:block;padding:0;min-height:100vh}.game-header{height:72px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:10px 18px;position:sticky;top:0;z-index:10}.game-header h2{margin:0;font-size:20px}.header-actions{display:flex;gap:8px}.game-layout{display:grid;grid-template-columns:168px minmax(0,1fr) 430px;height:calc(100vh - 72px);min-height:0}.board-wrap{position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center;background:#eceff3}.status-bar{position:absolute;left:14px;top:14px;z-index:2;background:rgba(255,255,255,.94);border:1px solid var(--line);border-radius:14px;padding:10px 12px;font-weight:700;box-shadow:0 6px 20px rgba(0,0,0,.08)}#board{display:block;max-width:100%;max-height:100%;touch-action:manipulation}.toast{position:absolute;left:50%;bottom:18px;transform:translateX(-50%) translateY(20px);background:#111827;color:#fff;padding:10px 14px;border-radius:999px;opacity:0;transition:.18s;pointer-events:none;white-space:nowrap}.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.sidebar{background:#fff;border-left:1px solid var(--line);padding:12px 14px;overflow:hidden;display:flex;flex-direction:column;min-height:0}.players{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;margin-bottom:8px;flex:none}.player-row{display:flex;justify-content:space-between;align-items:center;gap:6px;min-width:0;border:1px solid var(--line);border-radius:10px;padding:7px 8px;font-size:12px;line-height:1.15}.player-row.active{outline:2px solid #111827}.player-name{display:flex;align-items:center;gap:6px;font-weight:700;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.controls{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-bottom:8px}.controls button{padding:7px 5px}.tray-title-row{display:flex;justify-content:space-between;align-items:center;flex:none}.tray-title-row h3{margin:4px 0 6px;font-size:14px}.piece-tray{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));grid-template-rows:repeat(5,minmax(0,1fr));gap:5px;flex:1;min-height:0;overflow:hidden}.piece-card{min-height:0;height:100%;padding:3px;display:flex;align-items:center;justify-content:center;position:relative;background:#fafafa;border-radius:8px;overflow:hidden}.piece-card.selected{outline:3px solid #111827}.piece-card canvas{display:block;width:100%;height:auto;aspect-ratio:11/7}.piece-card .size-badge{position:absolute;right:3px;bottom:2px;font-size:9px;color:var(--muted)}
dialog{border:0;border-radius:20px;padding:0;box-shadow:var(--shadow);width:min(680px,calc(100% - 24px))}dialog::backdrop{background:rgba(0,0,0,.35)}.dialog-head{display:flex;justify-content:space-between;align-items:center;padding:18px 20px;border-bottom:1px solid var(--line)}.dialog-head h3{margin:0}.dialog-head button{border:0;font-size:22px;padding:4px 10px}#rules-content,#score-content{padding:20px;line-height:1.75}#score-dialog>.primary{margin:0 20px 20px;width:calc(100% - 40px)}.score-table{width:100%;border-collapse:collapse}.score-table td,.score-table th{padding:8px;border-bottom:1px solid var(--line);text-align:left}.winner{font-weight:900}
@media(max-width:860px){.screen{padding:14px}.mode-grid{grid-template-columns:1fr}.mode-card{min-height:150px}.game-layout{display:flex;flex-direction:column;height:auto;min-height:calc(100vh - 72px)}.board-wrap{height:min(68vh,620px);min-height:420px;overflow:auto}.sidebar{display:block;border-left:0;border-top:1px solid var(--line);overflow:visible;padding:16px}.players{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;margin-bottom:12px}.piece-tray{grid-template-columns:repeat(5,minmax(0,1fr));grid-template-rows:none;grid-auto-rows:auto;overflow:visible;min-height:auto}.piece-card{min-height:72px;height:auto}.status-bar{font-size:12px}.game-header{height:auto;min-height:64px}.game-layout{min-height:calc(100vh - 64px)}}
@media(max-width:520px){.hero h1{font-size:44px}.panel{padding:20px}.count-grid{grid-template-columns:1fr}.piece-tray{grid-template-columns:repeat(5,minmax(0,1fr));gap:5px}.piece-card{min-height:64px;padding:3px}.piece-card canvas{width:100%;height:auto}.header-actions button{padding:7px 9px;font-size:12px}.game-header h2{font-size:16px}.board-wrap{height:58vh;min-height:350px}.controls{grid-template-columns:repeat(4,1fr)}.controls button{font-size:12px;padding:8px 3px}.sidebar{padding:12px}}

/* Selected piece workspace */
.selected-piece-panel{border:1px solid var(--line);border-radius:14px;padding:9px;margin:0 0 8px;background:#f8fafc;transition:border-color .15s,background .15s;flex:none}
.selected-piece-panel:not(.empty){background:#fff;border-color:#aeb7c5}
.selected-piece-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:4px}
.selected-piece-head h3{margin:0;font-size:14px}
#selected-piece-size{font-size:11px;color:var(--muted);font-weight:700;white-space:nowrap}
.selected-piece-preview-wrap{min-height:78px;border:1px dashed #cbd2dc;border-radius:10px;background:#fff;display:grid;grid-template-columns:120px minmax(0,1fr);align-items:center;gap:8px;padding:6px 8px}
#selected-piece-preview{display:block;width:120px;max-width:100%;height:auto;aspect-ratio:28/15;margin:auto}
#selected-piece-help{margin:0;color:var(--muted);font-size:11px;line-height:1.35}
.selected-piece-panel:not(.empty) #selected-piece-help{color:#374151}
.selected-controls{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;margin-top:6px}
.selected-controls button{min-height:36px;padding:5px 4px;font-size:11.5px;font-weight:700}
.selected-controls button:disabled{cursor:not-allowed;opacity:.45;background:#f3f4f6}
.turn-actions{display:grid;grid-template-columns:1fr;gap:7px;margin-bottom:6px;flex:none}.turn-actions button{width:100%;min-height:34px;padding:5px 10px;font-size:11px;font-weight:800}.turn-actions #hint{background:#f4f7fb;color:#245ba7;border-color:#cbd7ea}.turn-actions button:disabled{opacity:.45;cursor:not-allowed}
.piece-card.selected{outline:3px solid #111827;background:#eef1f5}

@media(max-width:860px){
  .selected-piece-panel{padding:12px;margin-bottom:12px}
  .selected-piece-head h3{font-size:16px}
  #selected-piece-size{font-size:12px}
  .selected-piece-preview-wrap{grid-template-columns:minmax(120px,.8fr) minmax(135px,1.2fr);min-height:104px;padding:8px}
  #selected-piece-preview{width:150px;max-width:100%;height:auto}
  #selected-piece-help{font-size:12px;line-height:1.45}
  .selected-controls button{min-height:42px;font-size:12px}
}
@media(max-width:520px){
  .selected-piece-preview-wrap{grid-template-columns:1fr;gap:4px;text-align:center;min-height:138px}
  #selected-piece-preview{width:170px;max-width:100%;height:auto}
  #selected-piece-help{min-height:32px;font-size:11px}
  .selected-controls{grid-template-columns:repeat(3,1fr)}
  .selected-controls button{font-size:11px;padding:7px 2px}
}


@media (min-width:861px) and (max-height:760px){
  .sidebar{padding:8px 10px}
  .players{gap:4px;margin-bottom:5px}
  .player-row{padding:5px 6px;font-size:11px;border-radius:8px}
  .color-dot{width:14px;height:14px}
  .selected-piece-panel{padding:6px;margin-bottom:5px;border-radius:10px}
  .selected-piece-head{margin-bottom:3px}
  .selected-piece-head h3{font-size:12.5px}
  #selected-piece-size{font-size:10px}
  .selected-piece-preview-wrap{grid-template-columns:100px minmax(0,1fr);min-height:64px;padding:4px 6px;gap:6px}
  #selected-piece-preview{width:100px}
  #selected-piece-help{font-size:9.5px;line-height:1.25}
  .selected-controls{gap:4px;margin-top:4px}
  .selected-controls button{min-height:29px;padding:3px 2px;font-size:10px}
  .turn-actions{margin-bottom:4px;gap:4px}
  .turn-actions button{min-height:28px;padding:3px 8px;font-size:10px}
  .tray-title-row h3{margin:2px 0 4px;font-size:12px}
  #piece-count{font-size:11px}
  .piece-tray{gap:4px}
  .piece-card .size-badge{font-size:8px}
}

/* ===== Online room flow ===== */
.hidden{display:none!important}
.online-hero{max-width:720px}
.home-actions{display:grid;grid-template-columns:1fr 1fr;gap:14px;max-width:560px;margin:0 auto}
.home-main-btn{min-height:64px;font-size:18px;font-weight:850}
.resume-wrap{margin:14px auto 0;max-width:560px}.resume-wrap button{width:100%;min-height:46px}
.home-note{color:var(--muted);font-size:13px;margin:18px 0 0}
.connect-panel{max-width:560px}.field-label{display:block;font-size:13px;font-weight:800;margin:16px 0 7px}.text-input{width:100%;min-height:50px;border:1px solid var(--line);border-radius:12px;padding:12px 14px;font-size:16px;background:#fff;color:var(--text)}.room-code-input{font-size:28px;font-weight:900;letter-spacing:.22em;text-align:center;font-variant-numeric:tabular-nums}.field-help{font-size:12px;color:var(--muted);margin:7px 0 0}.connect-submit{width:100%;min-height:52px;margin-top:20px}.form-message{min-height:20px;margin:10px 0 0;color:#b42318;font-size:13px}
.room-screen.active{align-items:flex-start;padding:22px}.room-panel{max-width:1100px;padding:22px}.room-topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:18px}.room-code-line{font-size:14px;color:var(--muted)}.room-code-line strong{display:inline-block;color:var(--text);font-size:26px;letter-spacing:.13em;margin-left:8px;font-variant-numeric:tabular-nums}.room-content-grid{display:grid;grid-template-columns:minmax(280px,.85fr) minmax(320px,1.15fr);gap:16px}.room-card{border:1px solid var(--line);border-radius:18px;padding:18px;background:#fff}.room-section-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}.room-section-head h2,.room-card h2{margin:0;font-size:22px}.room-section-head span{font-size:12px;color:var(--muted);font-weight:800}.member-list{display:grid;gap:8px}.member-row{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:11px 12px;border:1px solid #e7eaf0;border-radius:12px;background:#fafbfc}.member-row.me{border-color:#aeb7c5;background:#f4f7fb}.member-main{display:flex;align-items:center;gap:9px;min-width:0}.member-seat{display:grid;place-items:center;width:26px;height:26px;border-radius:999px;background:#eef1f5;font-size:11px;font-weight:900;flex:none}.member-name{font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.member-badges{display:flex;gap:5px;align-items:center}.member-badge{font-size:10px;font-weight:850;padding:4px 7px;border-radius:999px;background:#eef1f5;color:#4b5563}.member-badge.host{background:#fff3c4;color:#735c00}.member-badge.you{background:#e8f0ff;color:#245ba7}.room-wait-card{display:flex;min-height:320px;flex-direction:column;align-items:center;justify-content:center;text-align:center}.room-wait-card p{max-width:460px;color:var(--muted);line-height:1.7;margin:10px auto 22px}.wait-icon{width:84px;height:84px;border:1px solid var(--line);border-radius:24px;display:grid;place-items:center;font-size:46px;margin-bottom:16px;background:#f8fafc;color:#2f74d0}.room-wait-card .primary{min-width:240px;min-height:50px}
.setup-online-panel{max-width:1180px}.setup-online-grid{display:grid;grid-template-columns:290px minmax(0,1fr);gap:16px}.setup-members-card{align-self:start}.member-list.compact .member-row{padding:9px 10px}.setup-options-card{padding:20px}.setup-heading-row{display:flex;align-items:center;justify-content:space-between;gap:10px}.setup-heading-row h2{margin:0}.host-only-note{font-size:11px;color:var(--muted);font-weight:750}.online-mode-grid{margin:14px 0 20px}.setup-mode-card{min-height:150px}.setup-mode-card.selected,.setup-count-grid button.selected{outline:3px solid #111827;background:#f5f7fa}.setup-mode-card:disabled,.setup-count-grid button:disabled{cursor:not-allowed;opacity:.55}.setup-count-block{border-top:1px solid var(--line);padding-top:18px}.setup-count-grid{margin-top:12px}.setup-count-grid button{padding:15px 8px;font-size:19px}.setup-start-area{border-top:1px solid var(--line);margin-top:18px;padding-top:16px}.setup-status-text{color:var(--muted);font-size:13px;line-height:1.55;margin:0 0 10px}.setup-start-area .primary{width:100%;min-height:52px}.setup-start-area .primary:disabled{opacity:.45;cursor:not-allowed}.mini-room-code{display:inline-block;font-size:10px;font-weight:850;color:var(--muted);letter-spacing:.08em}.game-title-meta{display:flex;align-items:center;gap:9px}.game-title-meta .eyebrow{margin:0}.game-title-wrap{min-width:0}
.player-row.waiting-turn{opacity:.82}.sidebar.readonly .piece-card{cursor:not-allowed}.sidebar.readonly .selected-piece-panel{opacity:.85}.turn-wait-note{font-weight:750;color:var(--muted)}

@media(max-width:860px){
  .home-actions{grid-template-columns:1fr}.room-screen.active{padding:12px;align-items:flex-start}.room-panel{padding:14px;border-radius:18px}.room-content-grid,.setup-online-grid{grid-template-columns:1fr}.room-wait-card{min-height:250px}.setup-members-card{order:2}.setup-options-card{order:1}.online-mode-grid{grid-template-columns:1fr 1fr}.setup-mode-card{min-height:125px}.room-code-line strong{font-size:21px}.room-topbar{padding-bottom:13px;margin-bottom:13px}.member-list.compact{grid-template-columns:repeat(2,minmax(0,1fr))}.member-list.compact .member-row{min-width:0}.game-title-meta{flex-wrap:wrap;gap:4px 8px}
}
@media(max-width:520px){
  .room-screen.active{padding:0}.room-panel{border-radius:0;border-left:0;border-right:0;padding:12px;box-shadow:none}.room-topbar{align-items:flex-start}.room-code-line{font-size:11px}.room-code-line strong{display:block;margin:2px 0 0;font-size:22px}.online-mode-grid{grid-template-columns:1fr}.setup-mode-card{min-height:112px}.setup-mode-card .mode-icon{width:58px;height:58px}.setup-mode-card strong{font-size:18px}.member-list.compact{grid-template-columns:1fr}.setup-heading-row{align-items:flex-start;flex-direction:column}.setup-count-grid{grid-template-columns:repeat(3,1fr)}.setup-count-grid button{font-size:16px;padding:13px 4px}.room-wait-card{min-height:220px}.wait-icon{width:68px;height:68px;font-size:36px}.room-card{padding:14px}.room-section-head h2,.room-card h2{font-size:19px}.home-main-btn{min-height:56px}
}

/* Smartphone placement confirmation */
.mobile-placement-actions{display:none}
.selected-piece-panel.pending-placement{border-color:#6b7280;background:#f7f9fc}
@media(max-width:860px){
  .board-wrap .mobile-placement-actions:not(.hidden){
    display:block;position:absolute;right:14px;top:14px;z-index:5;margin:0;
  }
  .board-wrap .mobile-placement-actions button{
    min-width:92px;min-height:44px;padding:8px 16px;border-radius:14px;font-weight:900;
    box-shadow:0 6px 18px rgba(17,24,39,.16);
  }
  .board-wrap .mobile-placement-actions .primary{background:#111827;color:#fff;border-color:#111827}
}
@media(max-width:520px){
  .board-wrap .mobile-placement-actions:not(.hidden){right:12px;top:12px}
  .board-wrap .mobile-placement-actions button{min-width:88px;min-height:42px;padding:7px 14px;font-size:14px}
}


/* Current-turn pieces panel */
.turn-pieces-panel{background:#fff;border-right:1px solid var(--line);padding:12px 10px;overflow:hidden;display:flex;flex-direction:column;min-width:0;min-height:0}
.turn-pieces-head{display:flex;align-items:flex-end;justify-content:space-between;gap:6px;margin-bottom:8px;flex:none}
.turn-pieces-head .eyebrow{font-size:8px;margin:0 0 2px;letter-spacing:.09em}
.turn-pieces-head h3{margin:0;font-size:12px;line-height:1.2;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:112px}
#turn-pieces-count{font-size:10px;color:var(--muted);font-weight:800;white-space:nowrap}
.turn-piece-tray{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-auto-rows:48px;gap:4px;align-content:start;min-height:0;overflow:hidden}
.turn-piece-mini{position:relative;display:grid;place-items:center;min-width:0;border:1px solid #e5e9ef;border-radius:8px;background:#fafbfc;overflow:hidden}
.turn-piece-mini canvas{display:block;width:100%;height:auto;aspect-ratio:6/4}
.turn-piece-mini .mini-size{position:absolute;right:2px;bottom:1px;font-size:7px;color:var(--muted);font-weight:700}
.turn-pieces-panel.no-pieces .turn-piece-tray{display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:11px;text-align:center}

.sync-status{display:inline-flex;align-items:center;gap:5px;font-size:9px;font-weight:850;border-radius:999px;padding:3px 7px;border:1px solid #d7dde7;background:#f8fafc;color:#526070;white-space:nowrap}
.sync-status::before{content:'';width:6px;height:6px;border-radius:50%;background:#31a36d;flex:none}
.sync-status.syncing::before{background:#d59c24}.sync-status.retrying::before{background:#d97706}.sync-status.offline::before{background:#9ca3af}.sync-status.error::before{background:#dc3a43}

/* Hint overlay status */
.sidebar.hint-active #hint{background:#e8f0ff;border-color:#8aa9d8;color:#174c91}

@media (min-width:861px) and (max-width:1180px){
  .game-layout{grid-template-columns:132px minmax(0,1fr) 390px}
  .turn-pieces-panel{padding:9px 7px}
  .turn-piece-tray{grid-template-columns:repeat(3,minmax(0,1fr));grid-auto-rows:42px;gap:3px}
  .turn-pieces-head h3{font-size:11px;max-width:88px}
}

@media(max-width:860px){
  .turn-pieces-panel{order:1;border-right:0;border-bottom:1px solid var(--line);padding:9px 12px;overflow:visible;min-height:auto}
  .board-wrap{order:2}
  .sidebar{order:3}
  .turn-pieces-head{align-items:center;margin-bottom:6px}
  .turn-pieces-head h3{font-size:13px;max-width:none}
  .turn-piece-tray{grid-template-columns:repeat(11,minmax(0,1fr));grid-auto-rows:44px;gap:4px;overflow:visible}
  .turn-piece-mini .mini-size{font-size:7px}
}
@media(max-width:520px){
  .turn-pieces-panel{padding:7px 8px}
  .turn-pieces-head{margin-bottom:5px}
  .turn-pieces-head .eyebrow{display:none}
  .turn-pieces-head h3{font-size:12px}
  .turn-piece-tray{grid-template-columns:repeat(7,minmax(0,1fr));grid-auto-rows:39px;gap:3px}
  .turn-piece-mini{border-radius:6px}
  .sync-status{font-size:8px;padding:2px 5px}
}