body {
    background-color: var(--bg-dark);
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

/* Background elements */
body::before {
    content: '';
    position: absolute;
    top: 15%;
    left: 15%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(255, 255, 255, 0) 70%);
    z-index: -1;
    border-radius: 50%;
}

body::after {
    content: '';
    position: absolute;
    bottom: 15%;
    right: 15%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.12) 0%, rgba(255, 255, 255, 0) 70%);
    z-index: -1;
    border-radius: 50%;
}

.auth-container {
    width: 100%;
    max-width: 440px;
    animation: fadeIn 0.6s ease;
}

.auth-logo {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 30px;
}

.auth-logo span {
    color: var(--secondary);
}

.auth-card {
    background: var(--bg-dark-secondary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.auth-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    text-align: center;
    color: white;
}

.auth-subtitle {
    font-size: 0.9rem;
    color: var(--text-light-muted);
    margin-bottom: 32px;
    text-align: center;
}

.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-light-muted);
    margin-bottom: 8px;
}

.form-control {
    width: 100%;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    color: white;
    font-size: 0.95rem;
    outline: none;
    transition: all var(--transition-fast);
}

.form-control:focus {
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.btn-auth {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    font-weight: 700;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    margin-top: 10px;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

.btn-auth:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.35);
}

.back-link {
    display: block;
    text-align: center;
    margin-top: 24px;
    font-size: 0.85rem;
    color: var(--text-light-muted);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.back-link:hover {
    color: white;
}

/* Alert Notification (2FA Sim) */
.alert-sim-code {
    background: rgba(14, 165, 233, 0.08);
    border: 1px solid rgba(14, 165, 233, 0.2);
    border-radius: var(--radius-md);
    padding: 16px;
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    animation: fadeIn 0.5s ease;
}

.alert-sim-title {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: flex;
    align-items: center;
    gap: 6px;
}

.alert-sim-desc {
    font-size: 0.85rem;
    color: var(--text-light-muted);
}

.alert-sim-value {
    font-family: monospace;
    font-size: 1.5rem;
    font-weight: 800;
    color: white;
    letter-spacing: 4px;
    text-align: center;
    background: rgba(0, 0, 0, 0.2);
    padding: 8px;
    border-radius: var(--radius-sm);
    margin-top: 4px;
}

/* Error messages */
.error-list {
    list-style: none;
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    margin-bottom: 24px;
}

.error-item {
    color: var(--danger);
    font-size: 0.85rem;
    font-weight: 500;
}