:root{--color-bg:#f0fdfa;--color-card:#fff;--color-text:#102a28;--color-muted:#475569;--color-border:#6b8a87;--color-border-soft:#d5e5e3;--color-primary:#0f766e;--color-primary-hover:#115e59;--color-on-primary:#fff;--color-danger:#b91c1c;--color-danger-bg:#fef2f2;--color-danger-text:#7f1d1d;--color-warning-bg:#fffbeb;--color-warning-border:#b45309;--color-warning-text:#78350f;--color-focus:#c2410c;--radius:8px;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:24px;--space-6:32px;--tap:44px}*,:before,:after{box-sizing:border-box}[hidden]{display:none!important}body{color:var(--color-text);background:var(--color-bg);-webkit-text-size-adjust:100%;margin:0;font-family:system-ui,-apple-system,Hiragino Sans,Hiragino Kaku Gothic ProN,Noto Sans JP,Yu Gothic UI,Meiryo,sans-serif;font-size:16px;line-height:1.7}.app{max-width:760px;padding:var(--space-5) var(--space-4) var(--space-6);margin:0 auto}.app-header h1{letter-spacing:.02em;color:var(--color-primary-hover);margin:0;font-size:1.75rem;line-height:1.3}.lead{margin:var(--space-1) 0 0;color:var(--color-muted)}.today-label{margin:var(--space-3) 0 0;padding:var(--space-1) var(--space-3);border:1px solid var(--color-border-soft);background:var(--color-card);border-radius:999px;font-weight:600;display:inline-block}h2{margin:0 0 var(--space-3);font-size:1.2rem;line-height:1.4}.card{margin-top:var(--space-5);padding:var(--space-4);border:1px solid var(--color-border-soft);border-radius:var(--radius);background:var(--color-card)}.task-form{gap:var(--space-3);display:grid}.field{margin-bottom:var(--space-3)}.task-form .field{margin-bottom:0}label{margin-bottom:var(--space-1);font-weight:700;display:block}.hint{margin-left:var(--space-1);color:var(--color-muted);font-size:.875rem;font-weight:400}input[type=text],input[type=date],select{width:100%;min-height:var(--tap);padding:var(--space-2) var(--space-3);font:inherit;color:inherit;background:var(--color-card);border:1px solid var(--color-border);border-radius:var(--radius);display:block}input::placeholder{color:#64748b}input[aria-invalid=true]{border:2px solid var(--color-danger)}.form-actions{display:flex}@media (width>=640px){.task-form{grid-template-columns:1fr 1fr}.task-form .field-title,.task-form .form-actions{grid-column:1/-1}}.button,.view-button{justify-content:center;align-items:center;gap:var(--space-2);min-height:var(--tap);min-width:var(--tap);padding:var(--space-2) var(--space-4);font:inherit;border-radius:var(--radius);cursor:pointer;font-weight:700;line-height:1.3;transition:background-color .15s,border-color .15s;display:inline-flex}.button-primary{color:var(--color-on-primary);background:var(--color-primary);border:2px solid var(--color-primary)}.button-primary:hover{background:var(--color-primary-hover);border-color:var(--color-primary-hover)}.button-secondary{color:var(--color-primary);background:var(--color-card);border:2px solid var(--color-primary)}.button-secondary:hover{background:#e6f4f2}.button-danger{color:#fff;background:var(--color-danger);border:2px solid var(--color-danger)}.button-danger-outline{color:var(--color-danger);background:var(--color-card);border:2px solid var(--color-danger)}.button-danger-outline:hover{background:var(--color-danger-bg)}.button:disabled,.button:disabled:hover{color:#475569;cursor:not-allowed;background:#e2e8f0;border-color:#94a3b8}.task-form .button-primary{width:100%}@media (width>=640px){.task-form .button-primary{width:auto;min-width:160px}}:focus-visible{outline:3px solid var(--color-focus);outline-offset:2px}input:focus-visible,select:focus-visible{outline-offset:1px}h2:focus-visible{outline-offset:4px}.status,.error,.notice{margin:var(--space-3) 0 0;padding:var(--space-2) var(--space-3);border-radius:var(--radius)}.status{border-left:4px solid var(--color-primary);background:#e6f4f2}.status:before{content:"✓ ";font-weight:700}.error{border-left:4px solid var(--color-danger);background:var(--color-danger-bg);color:var(--color-danger-text)}.error:before{content:"！ ";font-weight:700}.notice{border-left:4px solid var(--color-primary);background:#e6f4f2}.error:empty,.status:empty,.notice:empty{display:none}.field-error{margin:var(--space-1) 0 0;color:var(--color-danger-text);font-size:.9375rem}.field-error:before{content:"！ ";font-weight:700}.alert{margin-top:var(--space-5);padding:var(--space-4);border:2px solid var(--color-danger);border-radius:var(--radius);background:var(--color-danger-bg);color:var(--color-danger-text)}.alert[data-kind=warning]{border-color:var(--color-warning-border);background:var(--color-warning-bg);color:var(--color-warning-text)}.alert p{margin:0}.alert-actions{gap:var(--space-2);flex-wrap:wrap;display:flex}.alert-actions:has(.button:not([hidden])){margin-top:var(--space-3)}.views{gap:var(--space-2);grid-template-columns:1fr 1fr;max-width:360px;display:grid}.view-button{color:var(--color-primary);background:var(--color-card);border:2px solid var(--color-primary)}.view-button[aria-pressed=true]{color:var(--color-on-primary);background:var(--color-primary)}.view-button[aria-pressed=true]:before{content:"✓"}.view-count{font-size:.875rem;font-weight:400}.summary{margin:var(--space-3) 0 var(--space-2);color:var(--color-muted);font-size:.9375rem}.task-list{gap:var(--space-3);margin:0;padding:0;list-style:none;display:grid}.task{padding:var(--space-3) var(--space-3) var(--space-3) var(--space-4);border:1px solid var(--color-border-soft);border-left:6px solid var(--color-border-soft);border-radius:var(--radius);background:var(--color-card)}.task.priority-high{border-left-color:#c2410c}.task.priority-medium{border-left-color:#0369a1}.task.priority-low{border-left-color:#94a3b8}.task.is-overdue{border-color:var(--color-danger);border-left-color:var(--color-danger);background:snow}.task.is-done{background:#f8fafc}.task-main{align-items:flex-start;gap:var(--space-3);display:flex}.task-main input[type=checkbox]{width:26px;height:26px;accent-color:var(--color-primary);cursor:pointer;flex:none;margin:2px 0 0}.task-title{overflow-wrap:anywhere;cursor:pointer;margin:0;font-size:1.0625rem;font-weight:700;line-height:1.5}.task.is-done .task-title{color:#52606d;font-weight:400;text-decoration:line-through}.task-meta{gap:var(--space-2);margin:var(--space-2) 0 var(--space-3) 38px;flex-wrap:wrap;display:flex}.badge{padding:2px var(--space-2);border:1px solid #0000;border-radius:4px;font-size:.875rem;line-height:1.5;display:inline-block}.badge-status.is-open{color:#334155;border-color:#94a3b8}.badge-status.is-done{color:#334155;background:#e2e8f0}.badge-status.is-done:before{content:"✓ "}.badge-priority.priority-high{color:#9a3412;background:#ffedd5;font-weight:700}.badge-priority.priority-medium{color:#075985;background:#e0f2fe}.badge-priority.priority-low{color:#334155;background:#f1f5f9}.badge-due.due-overdue{color:#991b1b;background:#fee2e2;border-color:#991b1b;font-weight:700}.badge-due.due-overdue:before{content:"！ "}.badge-due.due-today{color:#115e59;background:#ccfbf1;font-weight:700}.badge-due.due-none,.badge-due.due-future,.badge-due.due-past{color:#334155;background:#f1f5f9}.task-actions{gap:var(--space-2);flex-wrap:wrap;margin-left:38px;display:flex}.empty{margin:var(--space-2) 0 0;padding:var(--space-4);border:2px dashed var(--color-border-soft);border-radius:var(--radius);color:var(--color-muted);text-align:center}dialog{width:min(480px,100vw - 32px);max-width:100%;max-height:calc(100vh - 32px);padding:var(--space-5) var(--space-4);border-radius:var(--radius);color:var(--color-text);background:var(--color-card);border:0}dialog::backdrop{background:#0f172a8c}.dialog-recovery{margin-top:var(--space-3)}.actions{gap:var(--space-2);margin-top:var(--space-4);flex-wrap:wrap;display:flex}@media (prefers-reduced-motion:reduce){*{transition:none!important}}@media (width<=479px){.card{padding:var(--space-3)}.task{padding-left:var(--space-3)}.task-meta,.task-actions{margin-left:0}}