:root{--bg:#f8fafc;--surface:#fff;--text:#0f172a;--muted:#64748b;--border:#e2e8f0;--accent:#2563eb;--danger:#b91c1c;--banner-bg:#fef2f2;--rank-1:#b91c1c;--rank-2:#2563eb;color:var(--text);background:var(--bg);font-family:system-ui,-apple-system,Segoe UI,Hiragino Sans,Yu Gothic UI,sans-serif;font-size:14px;line-height:1.4}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#0f172a;--surface:#1e293b;--text:#f1f5f9;--muted:#94a3b8;--border:#334155;--accent:#60a5fa;--danger:#f87171;--banner-bg:#451a1a;--rank-1:#f87171;--rank-2:#60a5fa}}:root[data-theme=dark]{--bg:#0f172a;--surface:#1e293b;--text:#f1f5f9;--muted:#94a3b8;--border:#334155;--accent:#60a5fa;--danger:#f87171;--banner-bg:#451a1a;--rank-1:#f87171;--rank-2:#60a5fa}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0}button,input{font:inherit}button{border:1px solid var(--border);background:var(--surface);min-height:28px;color:var(--text);cursor:pointer;border-radius:6px;padding:0 8px}button:disabled{opacity:.45;cursor:default}button[aria-pressed=true]{border-color:var(--accent);color:var(--accent);font-weight:600}h1{margin:0;font-size:16px}.board{width:100%;min-height:100vh;padding:8px;overflow-x:hidden}.board-header{justify-content:space-between;align-items:center;gap:6px;margin-bottom:6px;display:flex}.header-actions{gap:4px;display:flex}.sort-toggle{grid-template-columns:1fr 1fr;gap:4px;margin-bottom:6px;display:grid}.add-button{width:100%;margin-bottom:6px}.todo-form{background:var(--surface);border:1px solid var(--border);border-radius:8px;gap:6px;margin-bottom:6px;padding:8px;display:grid}.todo-form-field{color:var(--muted);gap:2px;font-size:12px;display:grid}.todo-form-field input,.todo-form-field textarea{border:1px solid var(--border);background:var(--bg);min-width:0;color:var(--text);border-radius:6px;padding:4px 6px}.todo-form-field input{min-height:30px}.todo-form-field textarea{resize:vertical}.todo-form-actions{justify-content:flex-end;gap:6px;display:flex}.todo-form-actions .primary{background:var(--accent);border-color:var(--accent);color:#fff}.todo-form-actions .todo-form-delete{margin-right:auto}.danger{border-color:var(--danger);color:var(--danger)}.todo-form-actions .danger:not(.todo-form-delete){background:var(--danger);color:#fff}.todo-confirm{border:1px solid var(--danger);background:var(--banner-bg);border-radius:6px;gap:8px;padding:8px;font-size:12px;display:grid}.todo-confirm p{margin:0}.title-button{width:100%;min-height:0;color:inherit;text-align:left;cursor:pointer;background:0 0;border:none;padding:0}.title-button:disabled{opacity:1;cursor:default}.banner{background:var(--banner-bg);color:var(--danger);border-radius:6px;justify-content:space-between;align-items:center;gap:6px;margin:0 0 6px;padding:6px 8px;font-size:12px;display:flex}.status{color:var(--muted);text-align:center;margin:12px 0;font-size:12px}.todo-list{background:var(--surface);border:1px solid var(--border);border-radius:8px;margin:0;padding:0;list-style:none}.todo-row{border-bottom:1px solid var(--border);grid-template-columns:20px minmax(0,1fr) auto auto;align-items:center;gap:6px;min-height:36px;padding:4px 6px;display:grid}.todo-row:last-child{border-bottom:none}.todo-row.is-done .title{color:var(--muted);text-decoration:line-through}.check{width:16px;height:16px;margin:0}.title{white-space:nowrap;text-overflow:ellipsis;min-width:0;overflow:hidden}.title-rank-1{color:var(--rank-1)}.title-rank-2{color:var(--rank-2)}.due{color:var(--muted);white-space:nowrap;font-size:12px}.due.is-overdue{color:var(--danger);font-weight:600}.drag-handle{touch-action:none;cursor:grab;min-width:26px;min-height:26px;padding:0;font-size:14px;line-height:1}.drag-handle[aria-pressed=true]{cursor:grabbing;color:var(--accent)}.todo-row.is-grabbed{z-index:1;background:var(--surface);position:relative;box-shadow:0 2px 8px #0000002e}.visually-hidden{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.empty,.status{color:var(--muted)}.done-section{margin-top:8px}.done-section>summary{color:var(--muted);cursor:pointer;padding:4px 2px;font-size:12px}.login{max-width:360px;margin:0 auto;padding:24px 16px}.login-form{gap:10px;display:grid}.login-form label{color:var(--muted);gap:4px;font-size:12px;display:grid}.login-form input{border:1px solid var(--border);background:var(--surface);min-height:36px;color:var(--text);border-radius:6px;padding:0 8px}.login-form button{background:var(--accent);border-color:var(--accent);color:#fff;min-height:38px}.preview-frame{border:1px dashed var(--border);background:var(--bg);border-radius:10px;margin:12px auto;overflow:hidden}@media (width<=600px){.board{padding:16px}.todo-row{min-height:44px}.drag-handle{min-width:36px;min-height:36px;font-size:16px}.add-button,.todo-form-field input,.todo-form-actions button{min-height:40px}}.pwa-notice{border:1px solid var(--accent);background:var(--surface);color:var(--text);gap:6px;margin:8px;display:grid}.pwa-notice-actions{justify-content:flex-end;gap:6px;display:flex}.pwa-notice-actions .primary{background:var(--accent);border-color:var(--accent);color:#fff}