:root{--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;--bg-primary: #ffffff;--bg-secondary: #f8fafc;--bg-tertiary: #f1f5f9;--bg-card: #ffffff;--border-color: #e2e8f0;--border-subtle: #edf2f7;--text-main: #0f172a;--text-muted: #64748b;--text-subtle: #94a3b8;--accent: #dc2626;--accent-hover: #b91c1c;--accent-light: #fef2f2;--accent-border: #fca5a5;--test-blue: #2563eb;--test-blue-light: rgba(37, 99, 235, .12);--test-blue-border: #3b82f6;--success: #10b981;--success-light: rgba(16, 185, 129, .12);--success-border: #059669;--warning: #f59e0b;--warning-light: #fffbeb;--primary-btn: #1e293b;--primary-btn-hover: #0f172a;--primary-btn-text: #ffffff;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--radius-sm: 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.task-item-text{text-decoration:line-through;color:var(--text-muted)}.task-item-delete-btn{background:none;border:none;color:var(--text-subtle);cursor:pointer;padding:2px 4px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;transition:color .15s}.task-item-delete-btn:hover{color:var(--accent)}.task-status-banner{padding:6px 10px;border-radius:var(--radius-sm);font-size:12px;font-weight:600;display:flex;align-items:center;gap:6px}.task-status-banner.all-done{background-color:var(--success-light);color:var(--success);border:1px solid var(--success-border)}.task-status-banner.pending{background-color:var(--warning-light);color:var(--warning)}.optimizer-card{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:14px 16px;display:flex;flex-direction:column;gap:10px;transition:border-color .15s,transform .15s}.optimizer-card:hover{border-color:#6366f1;transform:translateY(-2px);box-shadow:var(--shadow-md)}.optimizer-card-top{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px}.optimizer-groups-title{font-size:14px;font-weight:700;color:var(--text-main);display:flex;gap:8px;align-items:center;flex-wrap:wrap}.optimizer-metrics-row{display:flex;gap:8px;flex-wrap:wrap}.opt-badge{font-size:11px;font-weight:600;padding:3px 8px;border-radius:var(--radius-sm);display:inline-flex;align-items:center;gap:4px}.opt-badge.conflicts-zero{background-color:var(--success-light);color:var(--success);border:1px solid var(--success-border)}.opt-badge.conflicts-exist{background-color:var(--accent-light);color:var(--accent);border:1px solid var(--accent-border)}.opt-badge.days-badge{background-color:#6366f11f;color:#6366f1}.opt-badge.gap-badge{background-color:var(--bg-tertiary);color:var(--text-muted)}.modal-actions{padding:12px 20px;background-color:var(--bg-secondary);border-top:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center;gap:10px}.modal-actions-right{display:flex;gap:8px}.loading-indicator{display:inline-block;width:16px;height:16px;border:2px solid var(--border-color);border-top-color:var(--accent);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.toast{position:fixed;bottom:24px;right:24px;background-color:var(--primary-btn);color:var(--primary-btn-text);padding:10px 18px;border-radius:var(--radius-md);font-size:13px;font-weight:600;box-shadow:var(--shadow-lg);z-index:300;transform:translateY(40px);opacity:0;transition:all .2s ease;pointer-events:none}.toast.show{transform:translateY(0);opacity:1}