@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap";
:root{--primary-color:#2563eb;--primary-hover:#1d4ed8;--bg-color:#f8fafc;--card-bg:#fff;--text-main:#1e293b;--text-muted:#64748b;--border-color:#e2e8f0;--error-color:#ef4444;--success-color:#22c55e;--radius-sm:6px;--radius-md:12px;--radius-lg:16px;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a,0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a,0 4px 6px -4px #0000001a}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-main);-webkit-font-smoothing:antialiased;min-height:100vh;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;line-height:1.5}.login-container{justify-content:center;align-items:center;min-height:100vh;padding:1.5rem;display:flex}.login-card{background:var(--card-bg);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);border:1px solid var(--border-color);width:100%;max-width:400px;padding:2.5rem}.login-card h2{text-align:center;color:var(--text-main);margin-bottom:2rem;font-size:1.5rem;font-weight:700}.form-group{margin-bottom:1.5rem}.form-group label{color:var(--text-main);margin-bottom:.5rem;font-size:.9rem;font-weight:500;display:block}input[type=text],input[type=password]{border:1px solid var(--border-color);border-radius:var(--radius-sm);background-color:#fff;width:100%;padding:.75rem 1rem;font-family:inherit;font-size:1rem;transition:all .2s}input[type=text]:focus,input[type=password]:focus{border-color:var(--primary-color);outline:none;box-shadow:0 0 0 3px #2563eb1a}button{cursor:pointer;border:none;font-family:inherit}.login-button{background-color:var(--primary-color);color:#fff;border-radius:var(--radius-sm);width:100%;padding:.875rem;font-size:1rem;font-weight:600;transition:background-color .2s}.login-button:hover{background-color:var(--primary-hover)}.error-message{color:var(--error-color);border-radius:var(--radius-sm);text-align:center;background-color:#fef2f2;border:1px solid #fee2e2;margin-bottom:1.5rem;padding:.75rem;font-size:.9rem}.todo-container{flex-direction:column;max-width:700px;min-height:100vh;margin:0 auto;padding:2rem 1.5rem;display:flex}.todo-header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;margin-bottom:2.5rem;padding-bottom:1rem;display:flex}.todo-header h1{color:var(--text-main);letter-spacing:-.025em;font-size:1.875rem;font-weight:800}.logout-button{color:var(--text-muted);border:1px solid var(--border-color);border-radius:var(--radius-sm);background-color:#fff;padding:.5rem 1rem;font-size:.875rem;font-weight:500;transition:all .2s}.logout-button:hover{color:var(--text-main);background-color:#f1f5f9;border-color:#cbd5e1}.todo-form{gap:1rem;margin-bottom:2rem;display:flex}.todo-input{border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);flex:1;padding:.875rem 1rem;font-size:1rem}.todo-input:focus{border-color:var(--primary-color);outline:none;box-shadow:0 0 0 3px #2563eb1a}.add-button{background-color:var(--primary-color);color:#fff;border-radius:var(--radius-md);box-shadow:var(--shadow-sm);padding:0 1.5rem;font-size:1rem;font-weight:600;transition:all .2s}.add-button:hover:not(:disabled){background-color:var(--primary-hover);box-shadow:var(--shadow-md);transform:translateY(-1px)}.todo-list{flex-direction:column;gap:.75rem;display:flex}.todo-item{background:var(--card-bg);border-radius:var(--radius-md);border:1px solid var(--border-color);box-shadow:var(--shadow-sm);align-items:center;gap:1rem;padding:1rem 1.25rem;transition:all .2s;display:flex}.todo-item:hover{box-shadow:var(--shadow-md);border-color:#cbd5e1;transform:translateY(-1px)}.todo-checkbox input{width:1.25rem;height:1.25rem;accent-color:var(--success-color);cursor:pointer}.todo-content{flex:1;min-width:0}.todo-text{color:var(--text-main);cursor:pointer;margin-bottom:.25rem;font-size:1rem;transition:color .2s}.todo-item.completed .todo-text{color:var(--text-muted);text-decoration:line-through}.todo-date{color:var(--text-muted);font-size:.75rem}.todo-delete{color:var(--text-muted);opacity:0;border-radius:var(--radius-sm);background:0 0;padding:.5rem;transition:all .2s}.todo-item:hover .todo-delete{opacity:1}.todo-delete:hover{color:var(--error-color);background-color:#fef2f2}.empty-state,.loading-state{text-align:center;color:var(--text-muted);border-radius:var(--radius-lg);border:1px dashed var(--border-color);background:#fff;padding:4rem 2rem}.app-footer{text-align:center;color:var(--text-muted);margin-top:auto;padding:2rem;font-size:.875rem}@media (max-width:640px){.todo-container{padding:1rem}.todo-header{flex-direction:column;align-items:flex-start;gap:1rem;margin-bottom:1.5rem}.todo-header h1{font-size:1.5rem}.logout-button{align-self:flex-end;padding:.4rem .8rem;font-size:.8rem}.todo-form{flex-direction:column;gap:.75rem}.add-button{width:100%;padding:.875rem}.todo-item{padding:.875rem 1rem}.todo-delete{opacity:1}}