.auth-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f8f9fa;
    padding: 2rem 1rem;
}

.auth-card {
    width: 100%;
    max-width: 400px;
    background: #fff;
    border-radius: 12px;
    padding: 2.5rem 2rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.auth-brand {
    display: block;
    text-align: center;
    font-size: 0.85rem;
    font-weight: 600;
    color: #9ca3af;
    text-decoration: none;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 2rem;
}

.auth-card h1 {
    font-size: 1.4rem;
    font-weight: 600;
    color: #2a2a2a;
    margin: 0 0 0.5rem;
}

.auth-subtitle {
    color: #6b7280;
    font-size: 0.9rem;
    margin: 0 0 1.5rem;
    line-height: 1.5;
}

.auth-form {
    margin-top: 1.5rem;
}

.auth-form .field {
    margin-bottom: 1.25rem;
}

.auth-form label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: #374151;
    margin-bottom: 0.35rem;
}

.auth-form input[type="text"],
.auth-form input[type="email"],
.auth-form input[type="password"] {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 0.95rem;
    color: #2a2a2a;
    background: #fff;
    transition: border-color 0.15s;
    box-sizing: border-box;
}

.auth-form input:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.auth-submit {
    width: 100%;
    padding: 0.65rem;
    font-size: 0.95rem;
    border-radius: 6px;
    margin-top: 0.5rem;
}

.auth-error {
    background: #fef2f2;
    color: #991b1b;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 0.5rem;
}

.auth-message {
    text-align: center;
}

.auth-message p {
    color: #6b7280;
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0.5rem 0;
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.9rem;
    color: #6b7280;
}

.auth-link {
    color: #2563eb;
    text-decoration: none;
}

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

.auth-sep {
    margin: 0 0.5rem;
    color: #d1d5db;
}