.board-select{appearance:none;border:1px solid var(--hairline);color:var(--on-felt);cursor:pointer;transition:border-color .18s var(--ease), box-shadow .18s var(--ease);background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%239fc0dc' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") right 5px center/7px no-repeat,linear-gradient(#ffffff12,#ffffff05);border-radius:8px;padding:3px 15px 3px 6px;font-family:inherit;font-size:.72rem;font-weight:500}.board-select:hover{border-color:#f5c84280}.board-select:focus-visible{border-color:var(--gold);outline:none;box-shadow:0 0 0 3px #f5c8422e}.board-select option{color:var(--on-felt);background:#0d2138}.board-setting-row{flex-wrap:nowrap;justify-content:center;align-items:center;gap:3px;display:flex}.board-dead-wall-btn{cursor:pointer;transition:border-color .18s var(--ease), box-shadow .18s var(--ease);background:0 0;border:1px solid #0000;border-radius:8px;padding:3px}.board-dead-wall-btn:hover{border-color:var(--gold-soft);box-shadow:0 0 20px -8px var(--gold-soft)}.board-dead-wall-btn--active{border-color:var(--gold);box-shadow:0 0 20px -6px var(--gold)}.board-tile-btn,.board-melds-btn{cursor:pointer;background:0 0;border:none;padding:0;display:block}.board{--felt-hi:#1b4a78;--felt-base:#0e2f52;--felt-edge:#061a2e;--gold:#f5c842;--gold-soft:#f5c84259;--hairline:#ffffff17;--surface:#ffffff0f;--on-felt:#e9f1fa;--ease:cubic-bezier(.16, 1, .3, 1);background:radial-gradient(120% 90% at 50% 42%, var(--felt-hi) 0%, var(--felt-base) 55%, var(--felt-edge) 100%);border:1px solid var(--hairline);border-radius:16px;flex-direction:column;align-items:center;gap:8px;width:100%;height:100%;padding:10px;display:flex;overflow-x:auto;box-shadow:inset 0 1px #ffffff0f,inset 0 0 80px #00000073,0 18px 40px -24px #000000e6}.board-outer{flex:1;grid-template-rows:auto minmax(0,1fr) auto;grid-template-columns:auto minmax(0,1fr) auto;place-items:center;gap:2px;width:100%;min-height:0;display:grid}.board-outer--top{grid-area:1/2;place-self:start stretch}.board-outer--left{grid-area:2/1;place-self:stretch start}.board-outer--center{grid-area:2/2}.board-outer--right{grid-area:2/3;place-self:stretch end}.board-outer--bottom{grid-area:3/2;place-self:end stretch}.board-seat-hand-slot,.board-seat-melds{justify-content:center;align-items:center;display:flex;position:absolute}.board-outer--top .board-area,.board-outer--bottom .board-hand{height:var(--seat-depth)}.board-outer--left .board-area,.board-outer--right .board-area{height:100%;width:var(--seat-depth)}.board-outer--top .board-seat-hand-slot{right:min(calc(50% - var(--hand-len) / 2), calc(100% - var(--meld-len) - 8px - var(--hand-len)))}.board-outer--left .board-seat-hand-slot{top:min(calc(50% - var(--hand-len) / 2), calc(100% - var(--meld-len) - 8px - var(--hand-len)))}.board-outer--right .board-seat-hand-slot{bottom:min(calc(50% - var(--hand-len) / 2), calc(100% - var(--meld-len) - 8px - var(--hand-len)))}.board-hand-row .board-seat-hand-slot{left:min(calc(50% - var(--hand-len) / 2), calc(100% - var(--meld-len) - 8px - var(--hand-len)))}.board-outer--top .board-seat-melds{left:0}.board-outer--left .board-seat-melds{bottom:0}.board-outer--right .board-seat-melds{top:0}.board-hand-row .board-seat-melds{right:0}.board-grid{grid-template-rows:auto auto auto;grid-template-columns:auto auto auto;justify-content:center;place-items:center;gap:0;display:grid}.board-cell--top{grid-area:1/2}.board-cell--left{grid-area:2/1}.board-cell--center{grid-area:2/2}.board-cell--right{grid-area:2/3}.board-cell--bottom{grid-area:3/2}.board-area{color:#cddef0;width:100%;font:inherit;text-align:left;cursor:pointer;transition:background .18s var(--ease), border-color .18s var(--ease);background:0 0;border:1px solid #0000;border-radius:10px;flex-direction:column;align-items:center;gap:4px;padding:2px;display:flex;position:relative}.board-area:hover{background:#ffffff0d}.board-area--active{background:#f5c8421a;border-color:#f5c84247}.board-area--empty{border-style:dashed;border-color:#ffffff29;min-width:34px;min-height:34px}.board-tile-slot{flex-shrink:0;justify-content:center;align-items:center;display:inline-flex}.board-tile{box-sizing:border-box;object-fit:contain;background:#fff;border:2px solid #ccc;border-radius:6px;flex-shrink:0;padding:1px;display:block}.board-tile--back{background:linear-gradient(150deg,#f5cc7a 0%,#e0a045 55%,#c47e28 100%);border:1px solid #7a4a10;border-radius:3px;box-shadow:inset 1px 1px 3px #ffdc7873,inset -1px -1px 2px #0000004d}.board-tile--called{filter:brightness(.45)saturate(.7)}.board-tile--tsumogiri{filter:brightness(.75)}.board-tile--answer{outline-offset:-2px;border-radius:6px;outline:2px solid #2ecc71}.board-rot{flex-shrink:0;position:relative}.board-rot-inner{transform-origin:50%;flex-direction:column;justify-content:space-between;align-items:center;gap:2px;display:flex;position:absolute;top:50%;left:50%}.board-seat-hand-row{flex-direction:row;justify-content:flex-end;align-items:flex-end;gap:6px}.board-seat-hand{gap:2px;display:flex}.board-river{flex-direction:column;gap:2px;display:flex}.board-river-row{align-items:center;gap:2px;display:flex}.board-melds{flex-direction:row-reverse;justify-content:flex-end;align-items:flex-end;gap:6px;display:flex}.board-meld{align-items:flex-end;gap:1px;display:flex}.board-center{-webkit-backdrop-filter:blur(6px)saturate(115%);backdrop-filter:blur(6px)saturate(115%);border:1px solid var(--hairline);width:240px;height:240px;transition:background .18s var(--ease), box-shadow .18s var(--ease);background:linear-gradient(160deg,#051220a8,#02091280);border-radius:14px;justify-content:center;align-items:center;padding:10px;display:flex;position:relative;box-shadow:inset 0 1px #ffffff0d,0 10px 30px -18px #000000e6}.board-score--top,.board-score--bottom{position:absolute;left:50%;transform:translate(-50%)}.board-score--top{top:6px}.board-score--bottom{bottom:6px}.board-score--left,.board-score--right{position:absolute;top:50%;transform:translateY(-50%)}.board-score--left{left:6px}.board-score--right{right:6px}.board-center.board-area--active{box-shadow:inset 0 0 0 1px var(--gold-soft), 0 0 30px -12px var(--gold-soft);background:linear-gradient(160deg,#342a0c8c,#120f0680)}.board-center-info{text-align:center;flex-direction:column;flex-shrink:0;justify-content:center;align-items:center;gap:6px;max-width:132px;padding:0;display:flex}.board-kyoku{color:var(--gold);font-size:.85rem;font-weight:700}.board-junme{color:#9fbdd8;font-size:.75rem}.board-kyotaku{color:#f0dfa8;background:#f5c8421a;border:1px solid #f5c84238;border-radius:999px;padding:1px 10px;font-size:.72rem}.board-score{color:#cddef0;flex-direction:column;flex-shrink:0;align-items:center;gap:3px;width:44px;font-size:.72rem;display:flex}.board-score-wind,.board-score-value{color:inherit;font:inherit;cursor:pointer;background:0 0;border:none;padding:0}.board-score-wind{background:var(--surface);color:#dfeaf7;letter-spacing:.06em;transition:background .18s var(--ease), color .18s var(--ease);border-radius:999px;padding:1px 9px}.board-score--self .board-score-wind{color:#fff;background:linear-gradient(#4a90d9,#2f74bd);box-shadow:0 2px 10px -6px #4a90d9e6}.board-score-wind:hover{background:#f5c84242}.board-score--self .board-score-wind:hover{background:linear-gradient(#4a90d9,#3277bd)}.board-score-value{font-variant-numeric:tabular-nums;color:var(--on-felt);transition:color .18s var(--ease);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.78rem;font-weight:600}.board-score-value:hover{color:var(--gold)}.board-dead-wall{align-items:flex-end;gap:2px;display:flex}.board-seat--self{align-items:center}.board-hand{width:100%}.board-hand.board-area--active{background:0 0;border-color:#0000}.board-hand:hover,.board-hand.board-area--active:hover{background:#ffffff0d}.board-hand-row{width:100%;height:100%;position:relative}.board-hand-tiles{gap:3px;display:flex}.board-empty-text{text-align:center;color:#e9f1fab8;cursor:pointer;width:150px;transition:color .15s var(--ease);background:0 0;border:none;padding:4px 0;font-family:inherit;font-size:.95rem}@media (hover:hover){.board-empty-text:hover{color:var(--gold)}}.board--readonly .board-area,.board--readonly .board-score-wind,.board--readonly .board-score-value,.board--readonly .board-tile-btn,.board--readonly .board-melds-btn,.board--readonly .board-dead-wall-btn{cursor:default}.board--readonly .board-area:hover,.board--readonly .board-hand:hover{background:0 0}.board--readonly .board-dead-wall-btn:hover{box-shadow:none;background:0 0;border-color:#0000}.board--readonly .board-score-wind:hover{background:0 0}.board--readonly .board-score--self .board-score-wind:hover{background:linear-gradient(#4a90d9,#3277bd)}.board--readonly .board-score-value:hover{color:inherit}.responsive-board{align-self:center;width:100%;overflow:hidden}.responsive-board-inner{transform-origin:0 0}.chinitsu-share-btn{border:1px solid var(--color-border-strong);color:#fff;background:#000;border-radius:10px;justify-content:center;align-items:center;gap:8px;margin:12px 0 0;padding:12px;font-size:.95rem;font-weight:700;text-decoration:none;transition:background .2s,border-color .2s,box-shadow .2s;display:flex}@media (hover:hover){.chinitsu-share-btn:not(:disabled):hover{border-color:var(--color-primary);background:#16181c;box-shadow:0 2px 10px #0006}}.chinitsu-share-btn:disabled{opacity:.4;cursor:not-allowed}.chinitsu-share-icon{flex-shrink:0;width:18px;height:18px}.editor-header-actions .chinitsu-share-btn{white-space:nowrap;border-radius:6px;margin:0;padding:7px 12px;font-size:.85rem}.mp-cat-actions .chinitsu-share-btn{white-space:nowrap;border-radius:4px;gap:4px;height:24px;margin:0;padding:0 7px;font-size:.7rem}.mp-cat-actions .chinitsu-share-icon{width:12px;height:12px}.app-header{background:var(--color-surface);border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:center;gap:12px;margin:-24px -16px 28px;padding:14px 20px;display:flex}.app-header-title{color:var(--color-text-bright);white-space:nowrap;text-overflow:ellipsis;min-width:0;margin:0;font-size:1.1rem;font-weight:700;overflow:hidden}.user-info{flex-shrink:0;align-items:center;gap:10px;display:flex}.user-avatar{object-fit:cover;border:2px solid var(--color-border-strong);border-radius:50%;width:32px;height:32px}.user-avatar--fallback{background:var(--color-surface);color:var(--color-text-secondary);justify-content:center;align-items:center;display:inline-flex}.btn-login{background:var(--color-primary);color:var(--color-text-bright);cursor:pointer;white-space:nowrap;border:none;border-radius:8px;padding:7px 14px;font-size:.85rem;font-weight:700;transition:background .15s}.btn-login:hover{background:var(--color-primary-hover)}.app-header-cta{background:var(--color-primary);color:var(--color-text-bright);white-space:nowrap;border-radius:8px;flex-shrink:0;padding:7px 14px;font-size:.85rem;font-weight:700;text-decoration:none}.app-header-cta:hover{background:var(--color-primary-hover)}.btn-logout{border:1px solid var(--color-border-strong);color:var(--color-text-secondary);cursor:pointer;white-space:nowrap;background:0 0;border-radius:6px;padding:5px 12px;font-size:.8rem;transition:border-color .15s,color .15s}.btn-logout:hover{border-color:var(--color-danger);color:var(--color-danger)}.landing{text-align:center}.landing-hero{padding:40px 0 0}.landing-title{letter-spacing:.04em;color:var(--color-text-bright);margin:0 0 12px;font-size:clamp(1.9rem,7vw,2.6rem);font-weight:700}.landing-lead{color:var(--color-text-secondary);margin:0 0 32px;font-size:clamp(.95rem,3.4vw,1.05rem);line-height:1.7}.landing-cta{background:var(--color-accent);width:100%;min-height:56px;color:var(--color-bg);border-radius:10px;justify-content:center;align-items:center;padding:0 20px;font-size:1.05rem;font-weight:700;text-decoration:none;transition:background .15s,transform .15s;display:flex;box-shadow:0 4px 14px #88c0d02e}.landing-cta:active{filter:brightness(.92)}@media (hover:hover){.landing-cta:hover{background:#9ed0de;transform:translateY(-1px)}}.landing-contents{text-align:left;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:40px;display:grid}.landing-content-card{border:1px solid var(--color-border);background:var(--color-surface);border-radius:12px;flex-direction:column;padding:20px 18px;display:flex}.landing-content-card h2{color:var(--color-text-bright);margin:0 0 16px;font-size:1.15rem;font-weight:700}.landing-points{flex:1;margin:0 0 20px;padding:0;list-style:none}.landing-points li{align-items:flex-start;gap:10px;margin-bottom:16px;display:flex}.landing-points li:last-child{margin-bottom:0}.landing-feature-icon{color:var(--color-accent);flex-shrink:0;margin-top:1px}.landing-points strong{color:var(--color-text);margin-bottom:2px;font-size:.95rem;display:block}.landing-points span{max-width:34em;color:var(--color-text-muted);font-size:.9rem;line-height:1.7;display:block}.landing-secondary{border-top:1px solid var(--color-border);margin-top:64px;padding-top:32px}.landing-secondary h2{color:var(--color-text);margin:0 0 16px;font-size:1.15rem;font-weight:700}.landing-benefits{text-align:left;grid-template-columns:repeat(2,1fr);gap:16px;margin:0 0 24px;padding:0;list-style:none;display:grid}.landing-benefits li{margin-bottom:0}.landing-benefits strong{color:var(--color-text);margin-bottom:2px;font-size:.95rem;display:block}.landing-benefits span{color:var(--color-text-muted);font-size:.9rem;line-height:1.7}.landing-login-btn{border:1px solid var(--color-border-strong);min-height:44px;color:var(--color-text);cursor:pointer;background:0 0;border-radius:8px;padding:0 22px;font-size:.9rem;transition:background .15s}@media (hover:hover){.landing-login-btn:hover{background:var(--color-surface-hover)}}@media (width<=640px){.landing-hero{padding:24px 0 0}.landing-contents{grid-template-columns:1fr;margin-top:32px}.landing-points strong{font-size:1rem}.landing-points span{font-size:.95rem}.landing-secondary{margin-top:48px;padding-top:28px}.landing-benefits{grid-template-columns:1fr}}.category-list{text-align:center}.toggle-rows{margin-bottom:24px}.random-toggle-row{justify-content:flex-end;align-items:center;gap:10px;margin-bottom:10px;display:flex}.toggle-rows .random-toggle-row:last-child{margin-bottom:0}.random-toggle-label{color:var(--color-text-secondary);cursor:pointer;-webkit-user-select:none;user-select:none;font-size:.9rem}.random-toggle{background:var(--color-border-strong);cursor:pointer;border:none;border-radius:13px;flex-shrink:0;width:48px;height:26px;padding:0;transition:background .2s;position:relative}.random-toggle--on{background:var(--color-primary)}.random-toggle-thumb{background:var(--color-text-bright);border-radius:50%;width:20px;height:20px;transition:left .2s;position:absolute;top:3px;left:3px;box-shadow:0 1px 3px #0000004d}.random-toggle--on .random-toggle-thumb{left:25px}.book-tabs{z-index:50;background:var(--color-bg);scrollbar-width:none;-webkit-overflow-scrolling:touch;gap:6px;margin-bottom:8px;padding:8px 0 12px;display:flex;position:sticky;top:0;overflow-x:auto}.book-tabs::-webkit-scrollbar{display:none}.book-tab{border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text-secondary);cursor:pointer;white-space:nowrap;border-radius:8px;flex-shrink:0;align-items:center;gap:7px;padding:8px 16px;font-size:.9rem;font-weight:700;text-decoration:none;transition:background .15s,border-color .15s,color .15s;display:inline-flex}@media (hover:hover){.book-tab:hover{border-color:var(--color-primary-light);color:#c8d0dc}}.book-tab--active{background:var(--color-surface-active);border-color:var(--color-primary);color:var(--color-accent)}.book-tab--locked{color:var(--color-text-muted);border-style:dashed}.book-tab-badge{background:var(--color-primary);min-width:18px;height:18px;color:var(--color-text-bright);font-variant-numeric:tabular-nums;border-radius:9px;justify-content:center;align-items:center;padding:0 5px;font-size:.75rem;font-weight:700;display:inline-flex}.book-content{animation:.15s fadeIn}@keyframes fadeIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.book-group{margin-bottom:40px}.book-label{color:#ebcb8b;text-align:left;border-bottom:1px solid var(--color-border);background:#ebcb8b14;border-left:3px solid #d4aa60;justify-content:space-between;align-items:center;margin:0 0 16px;padding:8px 16px;font-size:1.2rem;font-weight:700;display:flex}.book-label-toggle{cursor:pointer;-webkit-user-select:none;user-select:none;flex:1;align-items:center;gap:8px;display:flex}.book-label-chevron{color:#d4aa60;flex-shrink:0;font-size:1rem;transition:transform .2s}.book-label--selectable{-webkit-user-select:none;user-select:none;transition:background .15s}.book-label--selectable:hover{background:#ebcb8b24}.book-label--checked{background:#ebcb8b29}.major-category-group{margin-bottom:28px}.major-category-label{color:#a3d48e;text-align:left;background:#a3be8c14;border-left:3px solid #7db860;border-radius:0 6px 6px 0;justify-content:space-between;align-items:center;margin:0 0 12px;padding:5px 12px;font-size:.95rem;font-weight:700;display:flex}.major-toggle-area{cursor:pointer;-webkit-user-select:none;user-select:none;flex:1;align-items:center;gap:8px;min-width:0;display:flex}@media (hover:hover){.major-toggle-area:hover .major-label-text{color:#c3e4b0}}.major-chevron{color:#7db860;flex-shrink:0;font-size:.65rem;transition:transform .15s}.major-chevron--open{transform:rotate(90deg)}.major-label-text{white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.major-summary{color:var(--color-text-muted);white-space:nowrap;font-variant-numeric:tabular-nums;flex-shrink:0;font-size:.75rem;font-weight:400}.select-badge{color:var(--color-text-secondary);cursor:pointer;border:1px solid var(--color-border-strong);background:0 0;border-radius:10px;flex-shrink:0;padding:2px 8px;font-size:.75rem;font-weight:400;transition:border-color .15s,color .15s}@media (hover:hover){.select-badge:hover{border-color:var(--color-primary);color:var(--color-accent)}}.select-badge--active{color:var(--color-accent);border-color:var(--color-primary)}.category-grid{flex-direction:column;gap:6px;animation:.15s fadeIn;display:flex}.category-card{background:var(--color-surface);border:1px solid var(--color-border);cursor:pointer;text-align:left;border-radius:8px;flex-direction:row;align-items:center;gap:10px;min-height:46px;padding:10px 14px;transition:border-color .2s,background .2s;display:flex}@media (hover:hover){.category-card:hover:not(.category-card--disabled){border-color:var(--color-primary-light);background:var(--color-surface-hover)}}.category-card--disabled{opacity:.35;cursor:default}.category-card--checked{border-color:var(--color-primary-light);background:var(--color-surface-active)}.card-check{color:var(--color-accent);flex-shrink:0;width:14px;font-size:.75rem;font-weight:700}.category-name{color:var(--color-text-bright);white-space:nowrap;text-overflow:ellipsis;flex:1;min-width:0;font-size:.88rem;font-weight:700;overflow:hidden}.category-count{color:var(--color-text-muted);white-space:nowrap;font-variant-numeric:tabular-nums;flex-shrink:0;font-size:.75rem}.category-card-status{flex-shrink:0;align-items:center;gap:10px;display:flex}.category-progress{flex-direction:row;flex-shrink:0;align-items:center;gap:6px;display:flex}.category-progress-bar{background:var(--color-border);border-radius:2px;width:52px;height:4px;overflow:hidden}.category-progress-fill{background:var(--color-success);border-radius:2px;height:100%;transition:width .4s}.category-progress-text{color:var(--color-success);white-space:nowrap;font-variant-numeric:tabular-nums;font-size:.75rem}.btn-reset-section{border:1px solid var(--color-border-strong);color:var(--color-text-secondary);cursor:pointer;white-space:nowrap;background:0 0;border-radius:5px;flex-shrink:0;padding:2px 8px;font-size:.75rem;line-height:1.5;transition:border-color .15s,color .15s,background .15s}.btn-reset-section:hover{border-color:var(--color-danger);color:var(--color-danger);background:#bf616a14}.major-category-actions{align-items:center;gap:6px;display:flex}.btn-reset-major{border:1px solid var(--color-border-strong);color:var(--color-text-secondary);cursor:pointer;white-space:nowrap;background:0 0;border-radius:5px;padding:2px 8px;font-size:.75rem;transition:border-color .15s,color .15s,background 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