.auth-body {
    background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.05), transparent),
                radial-gradient(circle at bottom left, rgba(16, 185, 129, 0.05), transparent),
                var(--bg);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 2rem;
}

.auth-container {
    width: 100%;
    max-width: 480px;
    animation: fadeIn 0.6s ease-out;
}

.auth-card {
    background: var(--surface);
    padding: 3.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    text-align: center;
    border: 1px solid var(--border);
}

.auth-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 2.5rem;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--secondary), var(--accent));
    color: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.auth-card h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.auth-card p {
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.input-group {
    text-align: left;
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.input-group input {
    width: 100%;
    padding: 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: var(--bg);
    transition: var(--transition);
    font-size: 1rem;
}

.input-group input:focus {
    outline: none;
    border-color: var(--secondary);
    background: white;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.auth-btn {
    width: 100%;
    padding: 1rem;
    font-size: 1.1rem;
    margin-top: 1rem;
}

.auth-footer {
    margin-top: 2rem;
    font-size: 0.95rem;
    color: var(--text-muted);
}

.auth-footer a {
    color: var(--secondary);
    font-weight: 700;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* ── Utility ── */
.hidden { display: none !important; }

.auth-error {
    background: #FEF2F2;
    border: 1px solid #FCA5A5;
    color: #DC2626;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 1.25rem;
    font-size: 0.875rem;
    text-align: left;
}

.btn-spinner { font-size: 0.9rem; }

code {
    background: var(--bg);
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    font-size: 0.82rem;
    color: var(--primary);
}