:root{--background:#f9fafb;--surface:#fff;--surface-muted:#f3f4f6;--ink:#111827;--muted:#6b7280;--line:#e5e7eb;--accent:#2563eb;--accent-strong:#1d4ed8;--accent-soft:#eff6ff;--danger:#dc2626;--danger-soft:#fef2f2;--success:#059669;--shadow:0 8px 24px #0f172a14}*{box-sizing:border-box}html{background:var(--background);color:var(--ink);min-width:320px;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}body{margin:0}button,input{font:inherit}button{cursor:pointer}button:disabled,input:disabled{cursor:not-allowed;opacity:.6}.login-page,.app-page{min-height:100dvh;padding:max(16px, env(safe-area-inset-top)) max(14px, env(safe-area-inset-right)) max(18px, env(safe-area-inset-bottom)) max(14px, env(safe-area-inset-left))}.login-page{background:linear-gradient(135deg,#dbeafe 0%,#f5f3ff 100%);justify-content:center;align-items:center;display:flex}.login-card,.panel,.stat-card,.todo-item{background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:8px}.login-card{gap:24px;width:100%;max-width:420px;padding:28px 22px;display:grid}.login-heading{text-align:center}.login-heading h1{font-size:2.4rem}.app-container{width:100%;max-width:760px;margin:0 auto}.app-header{justify-content:space-between;align-items:center;gap:14px;margin:6px 0 18px;display:flex}h1,h2,h3,p{margin:0}h1{font-size:2rem;line-height:1.1}h2{font-size:1.1rem;line-height:1.3}label,.field span{color:#374151;font-size:.9rem;font-weight:600}input{background:var(--surface);color:var(--ink);border:1px solid #d1d5db;border-radius:8px;outline:none;width:100%;min-height:48px;padding:0 12px;font-size:1rem}input:focus{border-color:#0000;box-shadow:0 0 0 3px #2563eb38}.primary-button,.secondary-button,.item-actions button{border-radius:8px;min-height:44px;padding:0 14px}.primary-button{background:var(--accent);border:1px solid var(--accent);color:#fff;font-weight:700}.primary-button:hover{background:var(--accent-strong)}.secondary-button,.item-actions button{background:var(--surface);border:1px solid var(--line);color:#374151;font-weight:600}.secondary-button:hover,.item-actions button:hover{background:var(--surface-muted)}.login-form,.todo-form,.field,.color-field{gap:10px;display:grid}.color-field>span{color:#374151;font-size:.9rem;font-weight:600}.color-options{gap:10px;display:flex}.color-option{--swatch-color:#2563eb;background:var(--surface);border:1px solid var(--line);border-radius:8px;place-items:center;width:58px;height:46px;padding:0;display:grid}.color-option[data-color=pink]{--swatch-color:#ec4899}.color-option span{background:var(--swatch-color);border-radius:999px;width:22px;height:22px;display:block}.color-option[aria-checked=true]{border-color:var(--swatch-color)}.color-option[data-color=blue][aria-checked=true]{box-shadow:0 0 0 3px #2563eb2e}.color-option[data-color=pink][aria-checked=true]{box-shadow:0 0 0 3px #ec48992e}.stats-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-bottom:14px;display:grid}.stat-card{color:var(--ink);text-align:left;width:100%;padding:14px 12px;transition:background .18s,border-color .18s,box-shadow .18s}.stat-card:hover{background:var(--surface-muted)}.stat-card:focus-visible{border-color:#0000;outline:none;box-shadow:0 0 0 3px #2563eb38}.stat-card span{font-size:1.45rem;font-weight:800;line-height:1;display:block}.stat-card p{color:var(--muted);margin-top:6px;font-size:.86rem}.panel{margin-top:14px;padding:16px}.todo-form{margin-top:14px}.add-button{width:100%}.error-message{background:var(--danger-soft);color:var(--danger);border:1px solid #fecaca;border-radius:8px;margin-top:14px;padding:10px 12px;line-height:1.6}.list-header{align-items:stretch;gap:12px;display:grid}.todo-list{gap:10px;margin-top:14px;display:grid}.empty-state{color:var(--muted);text-align:center;border:1px dashed #d1d5db;border-radius:8px;padding:26px 16px}.todo-item{--todo-color:#2563eb;border-left:5px solid var(--todo-color);box-shadow:none;grid-template-columns:28px minmax(0,1fr);align-items:start;gap:12px;padding:14px 14px 14px 10px;display:grid}.todo-item[data-color=blue]{--todo-color:#2563eb}.todo-item[data-color=pink]{--todo-color:#ec4899}.todo-item.done{background:#f9fafb}.check-label{place-items:center;height:28px;margin-top:1px;display:grid}.check-label input{opacity:0;width:1px;height:1px;position:absolute}.check-visual{background:var(--surface);border:2px solid #9ca3af;border-radius:6px;width:24px;height:24px;display:block;position:relative}.check-label input:checked+.check-visual{background:var(--success);border-color:var(--success)}.check-label input:checked+.check-visual:after{content:"";border:2px solid #fff;border-width:0 2px 2px 0;width:5px;height:10px;position:absolute;top:4px;left:8px;transform:rotate(45deg)}.todo-content h3{overflow-wrap:anywhere;font-size:1rem;line-height:1.5}.todo-note{color:var(--muted);overflow-wrap:anywhere;margin-top:5px;line-height:1.6}.todo-meta{color:#9ca3af;overflow-wrap:anywhere;margin-top:6px;font-size:.78rem;line-height:1.45}.done .todo-content h3,.done .todo-note{color:var(--muted);text-decoration:line-through}.done .todo-meta{color:#9ca3af;text-decoration:none}.edit-grid{gap:10px;display:grid}.item-actions{grid-column:1/-1;grid-template-columns:repeat(auto-fit,minmax(88px,1fr));gap:8px;display:grid}.item-actions .danger-button{color:var(--danger)}@media (min-width:640px){.login-card{padding:32px}.app-page{padding:28px}.app-header{margin-top:10px}h1{font-size:2.4rem}.panel{padding:20px}.todo-form{grid-template-columns:minmax(0,1.3fr) minmax(0,1fr) auto;align-items:end}.add-button{width:auto;min-width:92px}.todo-item{grid-template-columns:28px minmax(0,1fr) auto}.item-actions{flex-wrap:wrap;grid-column:auto;justify-content:flex-end;display:flex}.edit-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}}