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.25rem;font-size:2rem;font-weight:700;color:var(--text-primary)}.auth-intro,.todo-subtitle{margin:0;color:var(--text-secondary);font-size:.95rem;line-height:1.4}.auth-form,.todo-form{display:flex;flex-direction:column;gap:1rem}.form-control{display:flex;flex-direction:column;gap:.5rem}.form-control label,.todo-form label{font-weight:600;color:var(--text-primary);font-size:.9rem}.form-control input,.todo-form input{border:1px solid var(--border-color);border-radius:.75rem;padding:.75rem 1rem;font-size:1rem;font-family:inherit;background:var(--input-bg);color:var(--text-primary);transition:border-color .2s ease,box-shadow .2s ease,background-color .3s ease}.form-control input:focus,.todo-form input:focus{outline:none;border-color:var(--link-color);box-shadow:0 0 0 3px var(--focus-ring)}.primary-button,.secondary-button,.link-button{font-family:inherit;font-weight:600;font-size:1rem;border-radius:.75rem;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease}.primary-button{background:var(--button-primary);border:none;color:#fff;padding:.85rem 1.75rem;box-shadow:0 16px 32px var(--button-primary-shadow)}.primary-button:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 18px 36px var(--button-primary-shadow)}.primary-button:disabled{opacity:.6;cursor:not-allowed;box-shadow:none}.secondary-button{border:1px solid var(--button-secondary-border);background:var(--button-secondary-bg);color:var(--button-secondary-text);padding:.75rem 1.5rem}.secondary-button:hover:not(:disabled){background:var(--button-secondary-bg);opacity:.9}.secondary-button:disabled{opacity:.6;cursor:not-allowed}.link-button{background:transparent;border:none;color:var(--link-color);padding:.25rem 0;text-decoration:underline}.link-button:hover:not(:disabled){color:var(--link-hover)}.button-row{display:flex;flex-wrap:wrap;gap:.75rem}.status-message,.error-message{padding:.75rem 1rem;border-radius:.9rem;font-size:.95rem}.status-message{background:var(--status-bg);color:var(--status-text);border:1px solid var(--status-border)}.error-message{background:var(--error-bg);color:var(--error-text);border:1px solid var(--error-border)}.todo-header{display:flex;align-items:center;justify-content:space-between;gap:1rem}.todo-form-row{display:flex;gap:.75rem}.todo-form-row input{flex:1}.todo-list{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:.75rem}.todo-item{border:1px solid var(--border-light);border-radius:.9rem;padding:.9rem 1rem;background:var(--todo-item-bg);color:var(--text-primary);font-weight:500;transition:background-color .3s ease,border-color .3s ease}.empty-state{text-align:center;padding:1.5rem;color:var(--text-tertiary);border:1px dashed var(--empty-state-border);border-radius:1rem;background:var(--empty-state-bg)}.auth-switch{margin:.5rem 0 0;text-align:center;color:var(--text-tertiary);font-size:.9rem}.form-control select{border:1px solid var(--border-color);border-radius:.75rem;padding:.75rem 1rem;font-size:1rem;font-family:inherit;background:var(--input-bg);color:var(--text-primary);transition:border-color .2s ease,box-shadow .2s ease,background-color .3s ease}.form-control select:focus{outline:none;border-color:var(--link-color);box-shadow:0 0 0 3px var(--focus-ring)}.webauthn-manager{margin:2rem 0;padding:1.5rem;background:var(--todo-item-bg);border-radius:.75rem;border:1px solid var(--border-light);transition:background-color .3s ease,border-color .3s ease}.webauthn-manager h3{margin:0 0 1rem;font-size:1.25rem;color:var(--text-primary)}.webauthn-manager h4{margin:1.5rem 0 1rem;font-size:1rem;color:var(--text-secondary)}.credentials-list{margin-top:1.5rem}.credential-item{display:flex;justify-content:space-between;align-items:center;padding:1rem;background:var(--card-bg);border-radius:.5rem;margin-bottom:.75rem;border:1px solid var(--border-light);transition:background-color .3s ease,border-color .3s ease}.credential-item strong{display:block;color:var(--text-primary);margin-bottom:.25rem}.credential-item p{margin:0;font-size:.875rem;color:var(--text-tertiary)}@media (max-width: 640px){.app-shell{padding:2rem 1rem}.auth-card,.todo-card{padding:2rem 1.5rem}.todo-form-row{flex-direction:column}.todo-form-row input{width:100%}.button-row{flex-direction:column}.primary-button,.secondary-button,.link-button{width:100%;text-align:center}}:root{font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.5;--text-primary: #0f172a;--text-secondary: #475569;--text-tertiary: #64748b;--bg-primary: #eef2ff;--bg-gradient-1: rgba(99, 102, 241, .12);--bg-gradient-2: rgba(59, 130, 246, .12);--card-bg: #ffffff;--border-color: #cbd5f5;--border-light: rgba(226, 232, 240, .9);--input-bg: #ffffff;--button-primary: linear-gradient(135deg, #2563eb, #4f46e5);--button-primary-shadow: rgba(37, 99, 235, .25);--button-secondary-bg: rgba(79, 70, 229, .08);--button-secondary-border: rgba(79, 70, 229, .3);--button-secondary-text: #4338ca;--link-color: #2563eb;--link-hover: #1d4ed8;--status-bg: #eff6ff;--status-text: #1d4ed8;--status-border: rgba(37, 99, 235, .25);--error-bg: #fee2e2;--error-text: #b91c1c;--error-border: rgba(239, 68, 68, .35);--todo-item-bg: #f8fafc;--empty-state-bg: rgba(248, 250, 252, .6);--empty-state-border: rgba(148, 163, 184, .7);--shadow-color: rgba(15, 23, 42, .12);--focus-ring: rgba(37, 99, 235, .15);color:var(--text-primary);background-color:var(--bg-primary)}[data-theme=dark]{--text-primary: #f1f5f9;--text-secondary: #cbd5e1;--text-tertiary: #94a3b8;--bg-primary: #0f172a;--bg-gradient-1: rgba(99, 102, 241, .15);--bg-gradient-2: rgba(59, 130, 246, .15);--card-bg: #1e293b;--border-color: #334155;--border-light: rgba(51, 65, 85, .9);--input-bg: #0f172a;--button-primary: linear-gradient(135deg, #3b82f6, #6366f1);--button-primary-shadow: rgba(59, 130, 246, .3);--button-secondary-bg: rgba(99, 102, 241, .15);--button-secondary-border: rgba(99, 102, 241, .4);--button-secondary-text: #a5b4fc;--link-color: #60a5fa;--link-hover: #93c5fd;--status-bg: rgba(37, 99, 235, .15);--status-text: #93c5fd;--status-border: rgba(59, 130, 246, .3);--error-bg: rgba(239, 68, 68, .15);--error-text: #fca5a5;--error-border: rgba(239, 68, 68, .4);--todo-item-bg: #0f172a;--empty-state-bg: rgba(15, 23, 42, .6);--empty-state-border: rgba(71, 85, 105, .7);--shadow-color: rgba(0, 0, 0, .3);--focus-ring: rgba(59, 130, 246, .25)}*,*:before,*:after{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at top,var(--bg-gradient-1),transparent 55%),radial-gradient(circle at bottom,var(--bg-gradient-2),transparent 55%),var(--bg-primary);transition:background-color .3s ease,color .3s ease}a{color:inherit}a:hover{color:var(--link-hover)}button{font:inherit}