:root{--bg: #f4f6f8;--card: #ffffff;--border: #e2e8f0;--text: #1f2933;--muted: #64748b;--primary: #2563eb;--primary-dark: #1d4ed8;--danger: #dc2626;--high: #dc2626;--medium: #d97706;--low: #16a34a;--status-todo: #64748b;--status-in_progress: #2563eb;--status-done: #16a34a;--due: #dc2626;--shadow: 0 1px 3px rgba(0, 0, 0, .08)}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Hiragino Sans,Noto Sans JP,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}.site-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 24px;background:var(--card);border-bottom:1px solid var(--border);box-shadow:var(--shadow)}.site-header .brand{font-weight:700;font-size:1.2rem;text-decoration:none;color:var(--text)}.site-header nav{display:flex;align-items:center;gap:16px}.site-header nav a{text-decoration:none;color:var(--primary)}.site-header nav .user{color:var(--muted);font-size:.9rem}.site-header nav .workspace{color:var(--text);font-size:.9rem;font-weight:600}.container{max-width:900px;margin:0 auto;padding:24px 16px 64px}h1{font-size:1.5rem}.card{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:16px;margin-bottom:16px;box-shadow:var(--shadow)}.form label{display:flex;flex-direction:column;font-size:.85rem;color:var(--muted);gap:4px}.form input,.form select,.form textarea{font:inherit;padding:8px 10px;border:1px solid var(--border);border-radius:6px;background:#fff;color:var(--text)}.form input:focus,.form select:focus,.form textarea:focus{outline:2px solid var(--primary);outline-offset:0}button{cursor:pointer}.btn-primary{background:var(--primary);color:#fff;border:none;border-radius:6px;padding:9px 18px;font:inherit;font-weight:600}.btn-primary:hover{background:var(--primary-dark)}.btn-primary:disabled{opacity:.6;cursor:default}.btn-small{display:inline-block;background:#f1f5f9;color:var(--text);border:1px solid 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var(--primary);outline-offset:0}.pagination{display:flex;align-items:center;justify-content:center;gap:16px;margin-top:16px}.pagination .btn-small:disabled{opacity:.5;cursor:default}.filter-bar{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end}.filter-bar .clear-link{align-self:center;text-decoration:none}.task-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}.task-item{background:var(--card);border:1px solid var(--border);border-left:4px solid var(--border);border-radius:10px;box-shadow:var(--shadow);overflow:hidden}.task-item.priority-high{border-left-color:var(--high)}.task-item.priority-medium{border-left-color:var(--medium)}.task-item.priority-low{border-left-color:var(--low)}.task-row{display:flex;align-items:flex-start;gap:12px;padding:12px 16px;cursor:pointer}.task-row:hover{background:#f8fafc}.task-item .check{background:none;border:none;font-size:1.4rem;line-height:1;padding:0;color:var(--primary);cursor:pointer}.task-open-hint{align-self:center;color:var(--muted);font-size:1.3rem;line-height:1}.drag-handle{align-self:center;color:var(--muted);cursor:grab;font-size:1rem;line-height:1;-webkit-user-select:none;user-select:none}.task-item[draggable=true] .task-row{cursor:grab}.task-item.drag-over{outline:2px dashed var(--primary);outline-offset:-2px}.subtask-tree{list-style:none;margin:0;padding:0 0 6px 22px;display:flex;flex-direction:column;gap:0}.subtask-tree .task-item{border:none;border-radius:0;box-shadow:none;background:transparent;border-left:3px solid var(--border);margin-left:4px}.subtask-tree .task-row{padding:8px 12px}.subtask-tree .task-title{font-weight:500;font-size:.95rem}.task-main{flex:1;min-width:0}.task-title{font-weight:600}.task-item.done 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