:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --gradient-start: #6366f1;
    --gradient-end: #8b5cf6;
    --auth-bg: #f8fafc;
    --text-primary: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --card-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
}

* { box-sizing: border-box; }

body.auth-body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    margin: 0;
    min-height: 100vh;
    background: var(--auth-bg);
    color: var(--text-primary);
}

.auth-wrapper {
    display: flex;
    min-height: 100vh;
}

.auth-brand-panel {
    flex: 1;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    color: #fff;
    padding: 3rem;
    align-items: center;
    justify-content: center;
}

.auth-brand-content { max-width: 420px; }

.brand-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

.brand-logo i { font-size: 2rem; }

.auth-brand-content h1 {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.auth-brand-content p {
    opacity: 0.9;
    line-height: 1.6;
    margin-bottom: 2rem;
}

.auth-features { display: flex; flex-direction: column; gap: 1rem; }

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
    opacity: 0.95;
}

.feature-item i { width: 20px; text-align: center; }

.auth-form-panel {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    max-width: 520px;
}

.auth-form-container { width: 100%; max-width: 400px; }

.auth-header { margin-bottom: 2rem; }

.auth-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.auth-form .form-label {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.auth-form .form-control,
.auth-form .input-group-text {
    border-color: var(--border-color);
    padding: 0.625rem 0.875rem;
}

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

.auth-form .input-group-text {
    background: #f8fafc;
    color: var(--text-muted);
}

.btn-auth {
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: 0.5rem;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    border: none;
    transition: transform 0.15s, box-shadow 0.15s;
}

.btn-auth:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
    background: linear-gradient(135deg, var(--primary-dark), var(--gradient-end));
}

.auth-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.auth-link:hover { color: var(--primary-dark); }

.auth-divider {
    display: flex;
    align-items: center;
    margin: 1.5rem 0;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.auth-divider span { padding: 0 1rem; }

.auth-footer-text {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.letter-spacing { letter-spacing: 0.5rem; }

@media (max-width: 991.98px) {
    .auth-form-panel { max-width: 100%; }
}