/**
 * Login page – design tokens and styles (aligned with support portal).
 * Features: hierarchy, modern card, focus states, reduced motion, responsive.
 */

/* Skip link (a11y) */
.skip-link {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    background: #fff;
    color: var(--login-primary);
    font-weight: 600;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    z-index: 9999;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: 16px;
    outline: 2px solid var(--login-primary);
    outline-offset: 2px;
}

/* Design tokens (match support portal) */
:root {
    --login-primary: #003e6a;
    --login-primary-dark: #002d4f;
    --login-secondary: #0077be;
    --login-gradient: linear-gradient(135deg, #003e6a 0%, #0077be 100%);
    --login-card-bg: rgba(255, 255, 255, 0.95);
    --login-card-border: rgba(255, 255, 255, 0.3);
    --login-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    --login-shadow-soft: 0 4px 16px rgba(0, 0, 0, 0.12);
    --login-radius: 16px;
    --login-radius-card: 20px;
    --login-spacing: 24px;
    --login-focus-ring: 0 0 0 4px rgba(0, 62, 106, 0.2);
    --login-error: #ef4444;
    --login-error-bg: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
}

/* Base layout and typography (feature 2) */
.page-anonymous {
    background: var(--login-gradient);
    min-height: 100vh;
    transform: translateZ(0);
    will-change: scroll-position;
}

.page-anonymous::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 50%, rgba(0, 62, 106, 0.2) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(0, 119, 190, 0.2) 0%, transparent 50%);
    z-index: 0;
    pointer-events: none;
    animation: login-pulse 8s ease-in-out infinite;
    transform: translateZ(0);
    will-change: opacity;
    backface-visibility: hidden;
}

@keyframes login-pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 0.8; }
}

.container-tight {
    position: relative;
    z-index: 1;
    max-width: 40rem;
    margin-left: auto;
    margin-right: auto;
}

/* Card – modern styling and top accent bar (feature 3) */
.page-anonymous .card {
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    background: var(--login-card-bg);
    border: 1px solid var(--login-card-border);
    box-shadow: var(--login-shadow);
    border-radius: var(--login-radius-card);
    overflow: hidden;
    animation: login-fadeInUp 0.6s ease;
    transform: translateZ(0);
    will-change: transform;
    contain: layout style paint;
}

.page-anonymous .card::before {
    content: '';
    display: block;
    height: 4px;
    background: var(--login-gradient);
}

@keyframes login-fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.page-anonymous .card-body {
    padding: var(--login-spacing) calc(var(--login-spacing) * 1.25);
}

.page-anonymous .card-header {
    margin-bottom: calc(var(--login-spacing) / 1.5);
}

.page-anonymous .card-header h2 {
    font-weight: 700;
    font-size: 1.5rem;
    line-height: 1.3;
    background: var(--login-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0;
}

/* Form controls and focus (feature 3, 8) */
.page-anonymous .form-label {
    font-weight: 600;
    color: #374151;
    margin-bottom: 8px;
}

.page-anonymous .form-control {
    border: 2px solid rgba(0, 62, 106, 0.2);
    border-radius: 12px;
    padding: 12px 16px;
    min-height: 44px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    background: rgba(255, 255, 255, 0.9);
}

.page-anonymous .form-control:focus {
    border-color: var(--login-primary);
    box-shadow: var(--login-focus-ring);
    background: #fff;
    outline: none;
}

.page-anonymous .form-control:focus-visible {
    outline: 2px solid var(--login-primary);
    outline-offset: 2px;
}

/* Primary button and loading state (feature 6) */
.page-anonymous .btn-primary {
    background: var(--login-gradient);
    border: none;
    border-radius: 12px;
    padding: 14px 24px;
    min-height: 44px;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 15px rgba(0, 62, 106, 0.4);
    position: relative;
}

.page-anonymous .btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 62, 106, 0.6);
}

.page-anonymous .btn-primary:disabled {
    opacity: 0.85;
    cursor: not-allowed;
}

.page-anonymous .btn-primary .login-spinner {
    display: none;
    margin-left: 8px;
    vertical-align: middle;
}

.page-anonymous .btn-primary.is-loading .login-spinner {
    display: inline-block;
}

.page-anonymous .btn-primary.is-loading .login-btn-text {
    display: none;
}

/* Need Help? CTA (feature 5) */
.page-anonymous .support-link-btn {
    border: 2px solid var(--login-primary);
    color: var(--login-primary);
    border-radius: 12px;
    padding: 14px 24px;
    min-height: 44px;
    font-weight: 600;
    transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    background: rgba(0, 62, 106, 0.1);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.page-anonymous .support-link-btn:hover {
    background: var(--login-gradient);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 62, 106, 0.4);
    border-color: transparent;
    text-decoration: none;
}

.page-anonymous .support-link-btn:focus-visible {
    outline: 2px solid var(--login-primary);
    outline-offset: 2px;
}

.page-anonymous .support-link-btn i {
    font-size: 1.1em;
}

/* Error state (feature 7) */
.page-anonymous .alert-danger {
    border-radius: 12px;
    border: 2px solid var(--login-error);
    background: var(--login-error-bg);
    color: #991b1b;
    padding: 1rem 1.25rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.page-anonymous .alert-danger .alert-icon {
    flex-shrink: 0;
}

/* Trust indicator (feature 10) */
.login-trust {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 0.85rem;
    color: #6b7280;
    margin-top: 1rem;
}

.login-trust i {
    color: var(--login-primary);
}

/* Form footer spacing */
.page-anonymous .form-footer {
    margin-top: var(--login-spacing);
}

/* Checkbox focus (feature 8) */
.page-anonymous .form-check-input:focus,
.page-anonymous .form-check-input:focus-visible {
    border-color: var(--login-primary);
    box-shadow: var(--login-focus-ring);
}

.page-anonymous .form-check-input:checked {
    background-color: var(--login-primary);
    border-color: var(--login-primary);
}

.text-center.text-muted {
    color: rgba(255, 255, 255, 0.9) !important;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.drmcnatty-logo {
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.2));
    transition: transform 0.3s ease;
    margin-bottom: 2rem !important;
}

.drmcnatty-logo:hover {
    transform: scale(1.05);
}

/* Split layout option (feature 4) – optional two columns */
.page-anonymous.login-split-layout .container-tight {
    max-width: 60rem;
}

.page-anonymous.login-split-layout .row.justify-content-center {
    display: flex;
    flex-wrap: wrap;
    gap: var(--login-spacing);
}

/* Reduced motion (feature 9) */
@media (prefers-reduced-motion: reduce) {
    .page-anonymous::before,
    .page-anonymous .card,
    .page-anonymous .form-control,
    .page-anonymous .btn-primary,
    .page-anonymous .support-link-btn,
    .drmcnatty-logo {
        animation: none !important;
        transition-duration: 0.01ms !important;
    }
}

/* Responsive (feature 12) */
@media (max-width: 768px) {
    .page-anonymous .card-body {
        padding: 1.5rem;
    }

    .drmcnatty-logo {
        max-width: 280px;
    }

    .page-anonymous .form-control,
    .page-anonymous .btn-primary,
    .page-anonymous .support-link-btn {
        min-height: 44px;
    }
}

@media (max-width: 480px) {
    .page-anonymous .card-body {
        padding: 1.25rem;
    }

    .page-anonymous .card-header h2 {
        font-size: 1.25rem;
    }
}