@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";:root{--font-family:"Inter", sans-serif;--primary-color:#06f;--bg-color:#fff;--text-color:#222;--border-radius:8px;--shadow-sm:0 1px 3px #00000014;--shadow-md:0 4px 10px #0000001a;--shadow-lg:0 8px 20px #00000026;--transition:.2s ease-in-out;--bg-main:var(--bg-color);--bg-card:#fafafa;--border:#e5e7eb;--radius-md:var(--border-radius);--text-main:#111827;--text-muted:#6b7280;--text-light:#9ca3af;--danger:#dc2626;--danger-bg:#fee2e2;--primary:var(--primary-color);--success:#10b981}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background:var(--bg-color);color:var(--text-color);line-height:1.5}button,input,textarea{font-family:inherit}.container{max-width:960px;margin:0 auto;padding:1rem}.card{background:var(--bg-card);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);margin-bottom:1rem;padding:1.5rem}.input{border:1px solid var(--border);border-radius:var(--border-radius);width:100%;transition:var(--transition);padding:.75rem}.input:focus{border-color:var(--primary);outline:none}.btn-primary{background:var(--primary);color:#fff;border-radius:var(--border-radius);cursor:pointer;transition:var(--transition);border:none;padding:.75rem 1.5rem}.mt-2{margin-top:.5rem}.mt-4{margin-top:1rem}.mb-2{margin-bottom:.5rem}.mb-4{margin-bottom:1rem}.text-center{text-align:center}.landing-container{background:#f8f9fb;flex-direction:column;min-height:100vh;display:flex}.landing-header{z-index:10;background:#fff;border-bottom:1px solid #e8ecf0;justify-content:space-between;align-items:center;padding:20px 48px;display:flex;position:sticky;top:0;box-shadow:0 1px 4px #0000000a}.landing-nav{align-items:center;gap:12px;display:flex}.landing-main{flex-direction:column;flex:1;align-items:center;gap:64px;padding:80px 48px 60px;display:flex}.landing-hero{text-align:center;flex-direction:column;align-items:center;gap:24px;max-width:680px;display:flex}.hero-badge{color:#2563eb;background:#eff6ff;border-radius:100px;align-items:center;gap:8px;padding:6px 14px;font-size:13px;font-weight:600;display:inline-flex}.badge-dot{background:#2563eb;border-radius:50%;width:7px;height:7px;display:inline-block}.hero-title{color:#111827;letter-spacing:-1.5px;margin:0;font-size:56px;font-weight:800;line-height:1.12}.hero-accent{color:#2563eb}.hero-subtitle{color:#6b7280;max-width:520px;margin:0;font-size:17px;line-height:1.7}.hero-actions{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.landing-features{grid-template-columns:repeat(3,1fr);gap:24px;width:100%;max-width:860px;display:grid}@media (width<=700px){.landing-features{grid-template-columns:1fr}.hero-title{font-size:38px}.landing-header{padding:16px 24px}.landing-main{padding:48px 24px 40px}}.feature-card{background:#fff;border:1px solid #e8ecf0;border-radius:14px;flex-direction:column;gap:10px;padding:28px 24px;transition:box-shadow .2s;display:flex;box-shadow:0 2px 8px #0000000a}.feature-card:hover{box-shadow:0 6px 20px #00000014}.feature-icon{color:#2563eb;background:#eff6ff;border-radius:10px;justify-content:center;align-items:center;width:44px;height:44px;font-size:24px;display:flex}.feature-card h3{color:#111827;margin:0;font-size:15px;font-weight:700}.feature-card p{color:#6b7280;margin:0;font-size:14px;line-height:1.6}.btn-outline{color:#374151;cursor:pointer;background:0 0;border:1px solid #e2e8f0;border-radius:10px;justify-content:center;align-items:center;padding:11px 22px;font-size:14px;font-weight:600;transition:all .2s;display:inline-flex}.btn-outline:hover{background:#f1f5f9;border-color:#cbd5e1}.btn-lg{padding:13px 28px;font-size:15px}.landing-footer{text-align:center;color:#9ca3af;background:#fff;border-top:1px solid #e8ecf0;padding:20px;font-size:13px}@media (width<=480px){.landing-header{flex-direction:column;align-items:center;gap:12px;padding:16px}.landing-nav{justify-content:center;width:100%}.hero-title{font-size:32px}.hero-actions{flex-direction:column;gap:8px;width:100%}.hero-actions button{width:100%}.landing-main{gap:40px;padding:32px 16px}}.auth-page{background:#f8f9fb;flex-direction:column;justify-content:center;align-items:center;min-height:100vh;padding:24px;display:flex}.auth-logo-wrap{align-items:center;gap:10px;margin-bottom:28px;display:flex}.auth-logo-icon{color:#fff;background:#2563eb;border-radius:10px;justify-content:center;align-items:center;width:36px;height:36px;font-size:18px;font-weight:700;display:flex}.auth-logo-text{color:#111827;letter-spacing:-.4px;font-size:20px;font-weight:700}.auth-card{background:#fff;border:1px solid #e8ecf0;border-radius:16px;width:100%;max-width:420px;padding:36px 32px;box-shadow:0 4px 24px #0000000f}.auth-heading{color:#111827;margin:0 0 4px;font-size:22px;font-weight:700}.auth-subheading{color:#6b7280;margin:0 0 24px;font-size:14px}.auth-message{border-radius:10px;margin-bottom:18px;padding:10px 14px;font-size:14px;font-weight:500}.auth-message.success{color:#16a34a;background:#f0fdf4;border:1px solid #bbf7d0}.auth-message.error{color:#dc2626;background:#fff1f2;border:1px solid #fecdd3}.auth-form{flex-direction:column;gap:16px;display:flex}.form-group{flex-direction:column;gap:6px;display:flex}.form-group label{color:#374151;font-size:13px;font-weight:600}.form-input{color:#111827;box-sizing:border-box;background:#f8fafc;border:1px solid #e2e8f0;border-radius:10px;outline:none;width:100%;padding:10px 14px;font-size:14px;transition:border-color .2s}.form-input:focus{background:#fff;border-color:#2563eb;box-shadow:0 0 0 3px #2563eb1a}.btn-primary{color:#fff;cursor:pointer;background:#2563eb;border:none;border-radius:10px;justify-content:center;align-items:center;padding:11px 20px;font-size:14px;font-weight:600;transition:background .2s;display:inline-flex}.btn-full{width:100%}.auth-footer-text{text-align:center;color:#6b7280;margin-top:20px;font-size:14px}.auth-link{color:#2563eb;font-weight:600;text-decoration:none}.auth-link:hover{text-decoration:underline}@media (width<=480px){.auth-page{padding:16px}.auth-card{padding:28px 20px}}.todo-page{background:#f8f9fb;flex-direction:column;min-height:100vh;display:flex}.loading-page{color:#374151;background:#f8f9fb;flex-direction:column;justify-content:center;align-items:center;min-height:100vh;display:flex}.spinner{border:4px solid #e2e8f0;border-top-color:#2563eb;border-radius:50%;width:40px;height:40px;margin-bottom:16px;animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.todo-header{z-index:10;background:#fff;border-bottom:1px solid #e8ecf0;justify-content:space-between;align-items:center;padding:16px 48px;display:flex;position:sticky;top:0;box-shadow:0 1px 4px #0000000a}.logo-wrap{align-items:center;gap:10px;display:flex}.logo-icon{color:#fff;background:#2563eb;border-radius:9px;justify-content:center;align-items:center;width:34px;height:34px;font-size:16px;font-weight:700;display:flex}.logo-text{color:#111827;letter-spacing:-.3px;font-size:18px;font-weight:700}.user-section{align-items:center;gap:16px;display:flex}.user-info{align-items:center;gap:10px;display:flex}.user-avatar{color:#2563eb;text-transform:uppercase;background:#eff6ff;border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;font-size:13px;font-weight:700;display:flex}.user-email{color:#374151;text-overflow:ellipsis;white-space:nowrap;max-width:200px;font-size:14px;font-weight:500;overflow:hidden}.btn-signout{color:#6b7280;cursor:pointer;background:0 0;border:1px solid #e2e8f0;border-radius:8px;padding:8px 16px;font-size:13px;font-weight:500;transition:all .2s}.btn-signout:hover{color:#111827;background:#f1f5f9}.todo-main{flex:1;width:100%;max-width:720px;margin:0 auto;padding:40px 24px}.todo-add-card{background:#fff;border:1px solid #e8ecf0;border-radius:14px;margin-bottom:32px;padding:24px;box-shadow:0 2px 12px #0000000d}.card-title{color:#111827;margin:0 0 16px;font-size:16px;font-weight:700}.todo-form{flex-direction:column;gap:12px;display:flex}.todo-input{color:#111827;box-sizing:border-box;background:#f8fafc;border:1px solid #e2e8f0;border-radius:10px;outline:none;width:100%;padding:10px 14px;font-size:14px;transition:border-color .2s}.todo-input:focus{background:#fff;border-color:#2563eb}.list-title{color:#111827;margin:0 0 16px;font-size:16px;font-weight:700}.todo-list{flex-direction:column;gap:12px;display:flex}.todo-item-card{background:#fff;border:1px solid #e8ecf0;border-left:4px solid #cbd5e1;border-radius:12px;justify-content:space-between;align-items:center;gap:16px;padding:18px 20px;transition:box-shadow .2s;display:flex;box-shadow:0 1px 4px #0000000a}.todo-item-card:hover{box-shadow:0 4px 14px #00000014}.todo-item-card.completed{opacity:.65;border-left-color:#22c55e}.todo-item-card.completed .todo-title{color:#9ca3af;text-decoration:line-through}.todo-content{flex:1;align-items:center;gap:14px;min-width:0;display:flex}.todo-checkbox{cursor:pointer;background:0 0;border:2px solid #e2e8f0;border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;width:22px;height:22px;padding:0;transition:all .2s;display:flex}.todo-checkbox.checked{background:#22c55e;border-color:#22c55e}.checkmark{color:#fff;font-size:12px;font-weight:700}.todo-text{flex:1;min-width:0}.todo-title{color:#111827;white-space:nowrap;text-overflow:ellipsis;margin:0 0 2px;font-size:15px;font-weight:600;overflow:hidden}.todo-desc{color:#6b7280;white-space:nowrap;text-overflow:ellipsis;margin:0;font-size:13px;overflow:hidden}.todo-actions{flex-shrink:0;gap:8px;display:flex}.edit-form{flex-direction:column;flex:1;gap:8px;display:flex}.btn-primary{color:#fff;cursor:pointer;background:#2563eb;border:none;border-radius:9px;padding:9px 18px;font-size:13px;font-weight:600;transition:background .2s}.btn-primary:hover{background:#1d4ed8}.btn-save{color:#fff;cursor:pointer;background:#2563eb;border:none;border-radius:8px;padding:7px 14px;font-size:13px;font-weight:600;transition:background .2s}.btn-save:hover{background:#1d4ed8}.btn-cancel{color:#6b7280;cursor:pointer;background:0 0;border:1px solid #e2e8f0;border-radius:8px;padding:7px 14px;font-size:13px;font-weight:500;transition:all .2s}.btn-cancel:hover{color:#374151;background:#f1f5f9}.btn-edit{color:#6b7280;cursor:pointer;background:0 0;border:1px solid #e2e8f0;border-radius:8px;padding:7px 14px;font-size:13px;font-weight:500;transition:all .2s}.btn-edit:hover{color:#374151;background:#f1f5f9}.btn-delete{color:#dc2626;cursor:pointer;background:0 0;border:1px solid #dc262633;border-radius:8px;padding:7px 14px;font-size:13px;font-weight:500;transition:all .2s}.btn-delete:hover{background:#fff1f2}.empty-state{text-align:center;background:#fff9;border:2px dashed #e2e8f0;border-radius:14px;padding:48px 24px}.empty-icon{margin-bottom:12px;font-size:32px}.empty-state h4{color:#374151;margin:0 0 6px;font-size:16px}.empty-state p{color:#9ca3af;margin:0;font-size:14px}@media (width<=600px){.todo-header{padding:16px 20px}.user-email{display:none}.todo-main{padding:24px 16px}.todo-item-card{flex-direction:column;align-items:flex-start;gap:12px}.todo-actions{border-top:1px solid #f1f5f9;justify-content:flex-end;width:100%;padding-top:10px}.edit-form{width:100%}}