* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: #f0f2f5;
    color: #1a1a2e;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    width: 100%;
    max-width: 440px;
    padding: 20px;
}

.card {
    background: #fff;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
}

.logo h1 {
    text-align: center;
    color: #4361ee;
    font-size: 2rem;
    margin-bottom: 24px;
}

h2 {
    text-align: center;
    margin-bottom: 20px;
    font-size: 1.25rem;
    color: #333;
}

.site-info {
    text-align: center;
    margin-bottom: 16px;
    color: #555;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 0.9rem;
    color: #444;
}

.form-group input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: #4361ee;
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

.btn {
    display: block;
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    transition: background-color 0.2s;
}

.btn-primary {
    background-color: #4361ee;
    color: #fff;
    margin-top: 8px;
}

.btn-primary:hover {
    background-color: #3a56d4;
}

.btn-link {
    display: inline-block;
    width: auto;
    background: none;
    color: #4361ee;
    padding: 8px 0;
    margin-top: 12px;
    font-weight: 500;
}

.btn-link:hover {
    text-decoration: underline;
}

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.alert-error {
    background-color: #fef2f2;
    color: #dc2626;
    border: 1px solid #fee2e2;
}

.alert-info {
    background-color: #eff6ff;
    color: #2563eb;
    border: 1px solid #dbeafe;
}

.site-list {
    margin-bottom: 16px;
}

.site-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: border-color 0.2s, background-color 0.2s;
}

.site-option:hover {
    border-color: #4361ee;
    background-color: #f8f9ff;
}

.site-option input[type="radio"] {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.site-name {
    font-weight: 600;
    color: #333;
}

.site-url {
    font-size: 0.85rem;
    color: #888;
    margin-left: auto;
}