:root{--color-bg: #f9fafb;--color-surface: #ffffff;--color-text: #111827;--color-text-muted: #4b5563;--color-border: #d1d5db;--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-on-primary: #ffffff;--color-danger: #b91c1c;--color-danger-bg: #fef2f2;--color-success: #15803d;--color-success-bg: #f0fdf4;--color-focus: #1d4ed8;--color-skeleton: #e5e7eb;--color-overlay: rgba(17, 24, 39, .5);--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-6: 24px;--space-8: 32px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--size-touch-min: 44px;--header-height: 64px;--font-sans: "Inter", system-ui, sans-serif}*,*:before,*:after{box-sizing:border-box}body{margin:0;background:var(--color-bg);color:var(--color-text);font-family:var(--font-sans);font-size:16px;line-height:24px}h1{font-size:24px;line-height:32px;font-weight:600;margin:0}h2{font-size:20px;line-height:28px;font-weight:600;margin:0}.small{font-size:14px;line-height:20px}.muted{color:var(--color-text-muted)}a{color:var(--color-primary)}:focus-visible{outline:2px solid var(--color-focus);outline-offset:2px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.btn{min-height:var(--size-touch-min);padding:0 var(--space-4);border-radius:var(--radius-md);border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text);font:inherit;font-weight:600;cursor:pointer}.btn:disabled{cursor:not-allowed;opacity:.7}.btn-primary{background:var(--color-primary);border-color:var(--color-primary);color:var(--color-on-primary)}.btn-primary:hover:not(:disabled){background:var(--color-primary-hover)}.btn-danger{background:var(--color-danger);border-color:var(--color-danger);color:var(--color-on-primary)}.field{display:flex;flex-direction:column;gap:var(--space-1);margin-bottom:var(--space-4)}.field label{font-size:14px;line-height:20px;font-weight:600}.input{min-height:var(--size-touch-min);padding:0 var(--space-3);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);color:var(--color-text);font:inherit}textarea.input{padding:var(--space-3);min-height:96px;resize:vertical}.input::placeholder{color:var(--color-text-muted)}.input[aria-invalid=true]{border:2px solid var(--color-danger)}.field-error{color:var(--color-danger);font-size:14px;line-height:20px}.alert{padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);font-size:14px;line-height:20px;margin-bottom:var(--space-4)}.alert-error{background:var(--color-danger-bg);color:var(--color-danger);border:1px solid var(--color-danger)}.alert-success{background:var(--color-success-bg);color:var(--color-success);border:1px solid var(--color-success)}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:var(--space-4)}.auth-card{width:100%;max-width:420px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-4)}@media (min-width: 640px){.auth-card{padding:var(--space-8)}}.auth-card h1{margin-bottom:var(--space-6)}.auth-card .btn{width:100%}.auth-switch{margin:var(--space-4) 0 0;text-align:center}.caption{font-size:12px;line-height:16px}.app-header{height:var(--header-height);display:flex;align-items:center;justify-content:space-between;padding:0 var(--space-4);background:var(--color-surface);border-bottom:1px solid var(--color-border)}.app-title{font-size:20px;font-weight:600}.app-header-user{display:flex;align-items:center;gap:var(--space-3)}.content{max-width:720px;margin:0 auto;padding:var(--space-6) var(--space-4)}.content-head{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);margin-bottom:var(--space-4)}.task-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--space-4)}.task-row{display:flex;align-items:flex-start;gap:var(--space-3);padding:var(--space-3);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg)}@media (min-width: 640px){.task-row{padding:var(--space-4)}}.task-check-hit{position:relative;flex:none;width:var(--size-touch-min);height:var(--size-touch-min);margin:-10px 0 -10px -10px;display:flex;align-items:center;justify-content:center;cursor:pointer}.task-checkbox{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;margin:0;opacity:0;cursor:pointer}.task-checkbox:focus-visible+.task-check{outline:2px solid var(--color-focus);outline-offset:2px}.task-checkbox:disabled{cursor:progress}.task-check{flex:none;width:20px;height:20px;display:inline-flex;align-items:center;justify-content:center;border:2px solid var(--color-text-muted);border-radius:var(--radius-sm);color:var(--color-on-primary);font-size:14px;line-height:1}.task-body{flex:1;min-width:0;display:flex;flex-direction:column;overflow-wrap:anywhere}.task-title{font-weight:600}.is-done .task-check{background:var(--color-primary);border-color:var(--color-primary)}.is-done .task-title{text-decoration:line-through;color:var(--color-text-muted)}.task-done-label{color:var(--color-success)}.task-actions{flex:none;display:flex;align-items:center}.empty-card{padding:var(--space-6) var(--space-4);text-align:center;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg)}.empty-card p{margin:var(--space-1) 0 0}.skeleton{display:block;background:var(--color-skeleton);border-radius:var(--radius-sm)}.skeleton-box{flex:none;width:20px;height:20px}.skeleton-line{height:12px;margin:4px 0}.empty-card .btn{margin-top:var(--space-4)}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:10;display:flex;align-items:center;justify-content:center;padding:var(--space-4);background:var(--color-overlay)}.dialog{width:100%;max-width:480px;max-height:100%;overflow-y:auto;padding:var(--space-6);background:var(--color-surface);border-radius:var(--radius-lg)}.dialog h2{margin-bottom:var(--space-4)}.dialog-head{display:flex;align-items:center;justify-content:space-between}.dialog-actions{display:flex;justify-content:flex-end;gap:var(--space-3)}.link-btn{min-height:var(--size-touch-min);padding:0 var(--space-2);border:0;background:none;color:var(--color-primary);font:inherit;font-weight:600;cursor:pointer}.link-danger{color:var(--color-danger)}.dialog-cancel-mobile{display:none}@media (max-width: 639px){.dialog-fullscreen{max-width:none;height:100%;border-radius:0;padding:var(--space-4)}.overlay:has(.dialog-fullscreen){padding:0}.dialog-fullscreen .dialog-cancel-mobile{display:inline-block}.dialog-fullscreen .dialog-actions{flex-direction:column-reverse}.dialog-fullscreen .dialog-actions .btn{width:100%}}