body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #f5f5f5;
}

.container {
    text-align: center;
    background: white;
    padding: 3rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    max-width: 400px;
    width: 90%;
}

h1 {
    color: #333;
    margin: 0 0 1rem 0;
    font-size: 1.5rem;
    font-weight: 600;
}

p {
    color: #6b7280;
    margin: 0.5rem 0;
    line-height: 1.6;
}

.icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.btn {
    display: inline-block;
    margin-top: 1.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #14b8a6 0%, #0891b2 50%, #0284c7 100%);
    color: white;
    text-decoration: none;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.2s;
}

.btn:hover {
    box-shadow: 0 4px 12px rgba(20, 184, 166, 0.3);
    transform: translateY(-2px);
}

.btn:active {
    transform: scale(0.98);
}

.divider {
    margin: 1.5rem 0;
    color: #d1d5db;
}

.link-small {
    display: block;
    margin-top: 3rem;
    color: #d1d5db;
    font-size: 0.8rem;
    text-decoration: none;
}

.link-small:hover {
    color: #9ca3af;
    text-decoration: underline;
}

.hint {
    color: #9ca3af;
    font-size: 0.85rem;
    margin-top: 1rem;
}

.hint code {
    background: #f3f4f6;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.8rem;
}

input[type="text"] {
    flex: 1;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    outline: none;
}

input[type="text"]:focus {
    border-color: #14b8a6;
    box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.1);
}

.option {
    font-weight: 600;
    color: #374151;
}

hr {
    border: none;
    border-top: 1px solid #e5e7eb;
    margin: 1.5rem 0;
}

h1.error { color: #dc2626; }
h1.warning { color: #f59e0b; }
h1.success { color: #10b981; }
h1.info { color: #3b82f6; }