/**
 * MDCodeLookup Engagement Suite — Core Styles
 * Version: 1.0.0
 *
 * Production-quality engagement UI for health calculator pages.
 * Mobile-first, accessible (WCAG AA 4.5:1 contrast), CSS-variable driven.
 */

/* ==========================================================================
   1. CSS Custom Properties (Design Tokens)
   ========================================================================== */

:root {
    /* ---- Brand palette ---- */
    --mdce-primary:           #0ea5e9;
    --mdce-primary-hover:     #0284c7;
    --mdce-primary-light:     #e0f2fe;
    --mdce-secondary:         #10b981;
    --mdce-secondary-hover:   #059669;
    --mdce-secondary-light:   #d1fae5;

    /* ---- Accent per action ---- */
    --mdce-save:              #10b981;
    --mdce-save-hover:        #059669;
    --mdce-print:             #3b82f6;
    --mdce-print-hover:       #2563eb;
    --mdce-share:             #8b5cf6;
    --mdce-share-hover:       #7c3aed;
    --mdce-dashboard:         #f59e0b;
    --mdce-dashboard-hover:   #d97706;

    /* ---- Neutrals ---- */
    --mdce-text:              #1e293b;
    --mdce-text-secondary:    #475569;
    --mdce-text-muted:        #94a3b8;
    --mdce-border:            #e2e8f0;
    --mdce-border-hover:      #cbd5e1;
    --mdce-bg:                #ffffff;
    --mdce-bg-subtle:         #f8fafc;
    --mdce-bg-muted:          #f1f5f9;

    /* ---- Surfaces ---- */
    --mdce-card-bg:           #ffffff;
    --mdce-card-shadow:       0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --mdce-card-shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
    --mdce-overlay:           rgba(15, 23, 42, 0.55);

    /* ---- Typography ---- */
    --mdce-font:              -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
                              Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
    --mdce-font-mono:         'SF Mono', SFMono-Regular, ui-monospace, Menlo, Consolas,
                              'Liberation Mono', monospace;

    /* ---- Spacing scale (4px base) ---- */
    --mdce-space-1:  0.25rem;  /*  4px */
    --mdce-space-2:  0.5rem;   /*  8px */
    --mdce-space-3:  0.75rem;  /* 12px */
    --mdce-space-4:  1rem;     /* 16px */
    --mdce-space-5:  1.25rem;  /* 20px */
    --mdce-space-6:  1.5rem;   /* 24px */
    --mdce-space-8:  2rem;     /* 32px */
    --mdce-space-10: 2.5rem;   /* 40px */
    --mdce-space-12: 3rem;     /* 48px */

    /* ---- Radii ---- */
    --mdce-radius-sm:   6px;
    --mdce-radius:      10px;
    --mdce-radius-lg:   14px;
    --mdce-radius-xl:   20px;
    --mdce-radius-full: 9999px;

    /* ---- Motion ---- */
    --mdce-transition:      0.2s ease;
    --mdce-transition-slow: 0.3s ease;

    /* ---- Focus ring ---- */
    --mdce-focus-ring: 0 0 0 3px rgba(14, 165, 233, 0.35);

    /* ---- Z-index scale ---- */
    --mdce-z-panel:        10;
    --mdce-z-toggle:       100;
    --mdce-z-notification: 1000;
    --mdce-z-modal:        10000;
}


/* ==========================================================================
   2. Engagement Panel Container
   ========================================================================== */

.mdce-panel {
    font-family: var(--mdce-font);
    color: var(--mdce-text);
    background: var(--mdce-card-bg);
    border: 1px solid var(--mdce-border);
    border-radius: var(--mdce-radius-lg);
    box-shadow: var(--mdce-card-shadow);
    padding: var(--mdce-space-6);
    margin: var(--mdce-space-8) auto;
    max-width: 820px;
    position: relative;
    z-index: var(--mdce-z-panel);
    transition: box-shadow var(--mdce-transition), border-color var(--mdce-transition);
}

.mdce-panel:hover {
    box-shadow: var(--mdce-card-shadow-hover);
}

/* Dividers between major sections inside panel */
.mdce-panel > * + * {
    margin-top: var(--mdce-space-6);
}


/* ==========================================================================
   3. Action Bar (Save / Print / Share / Dashboard)
   ========================================================================== */

.mdce-action-bar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--mdce-space-2);
    padding: var(--mdce-space-3) 0;
    border-bottom: 1px solid var(--mdce-border);
}

/* ---- Base button ---- */
.mdce-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--mdce-space-2);
    padding: var(--mdce-space-2) var(--mdce-space-4);
    font-family: var(--mdce-font);
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.4;
    border: 1.5px solid transparent;
    border-radius: var(--mdce-radius-full);
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
    transition: background var(--mdce-transition),
                color var(--mdce-transition),
                border-color var(--mdce-transition),
                box-shadow var(--mdce-transition),
                transform var(--mdce-transition);
    -webkit-appearance: none;
    appearance: none;
}

.mdce-btn:focus-visible {
    outline: none;
    box-shadow: var(--mdce-focus-ring);
}

.mdce-btn:active {
    transform: scale(0.97);
}

.mdce-btn svg {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
}

/* ---- Save (green/teal) ---- */
.mdce-btn-save {
    background: var(--mdce-save);
    color: #ffffff;
    border-color: var(--mdce-save);
}

.mdce-btn-save:hover,
.mdce-btn-save:focus-visible {
    background: var(--mdce-save-hover);
    border-color: var(--mdce-save-hover);
    color: #ffffff;
}

/* ---- Print (blue) ---- */
.mdce-btn-print {
    background: var(--mdce-print);
    color: #ffffff;
    border-color: var(--mdce-print);
}

.mdce-btn-print:hover,
.mdce-btn-print:focus-visible {
    background: var(--mdce-print-hover);
    border-color: var(--mdce-print-hover);
    color: #ffffff;
}

/* ---- Share (purple) ---- */
.mdce-btn-share {
    background: var(--mdce-share);
    color: #ffffff;
    border-color: var(--mdce-share);
}

.mdce-btn-share:hover,
.mdce-btn-share:focus-visible {
    background: var(--mdce-share-hover);
    border-color: var(--mdce-share-hover);
    color: #ffffff;
}

/* ---- Dashboard (orange, styled as ghost/link button) ---- */
.mdce-btn-dashboard {
    background: transparent;
    color: var(--mdce-dashboard);
    border-color: var(--mdce-dashboard);
}

.mdce-btn-dashboard:hover,
.mdce-btn-dashboard:focus-visible {
    background: var(--mdce-dashboard);
    color: #ffffff;
}

.mdce-btn-dashboard:visited {
    color: var(--mdce-dashboard);
}

.mdce-btn-dashboard:hover:visited {
    color: #ffffff;
}


/* ==========================================================================
   4. "What Should I Do Next?" Panel
   ========================================================================== */

.mdce-next-steps {
    padding-top: var(--mdce-space-4);
}

.mdce-next-title {
    font-family: var(--mdce-font);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--mdce-text);
    margin: 0 0 var(--mdce-space-4);
    line-height: 1.3;
}

.mdce-next-steps-content {
    display: flex;
    flex-direction: column;
    gap: var(--mdce-space-3);
}

/* ---- Individual recommendation card ---- */
.mdce-next-step-item {
    display: flex;
    align-items: flex-start;
    gap: var(--mdce-space-3);
    background: var(--mdce-bg-subtle);
    border: 1px solid var(--mdce-border);
    border-radius: var(--mdce-radius);
    padding: var(--mdce-space-4);
    transition: border-color var(--mdce-transition),
                box-shadow var(--mdce-transition),
                background var(--mdce-transition);
}

.mdce-next-step-item:hover {
    border-color: var(--mdce-primary);
    box-shadow: 0 2px 8px rgba(14, 165, 233, 0.08);
}

/* Icon circle */
.mdce-next-step-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--mdce-radius-full);
    background: var(--mdce-primary-light);
    color: var(--mdce-primary);
    font-size: 1.125rem;
    line-height: 1;
}

.mdce-next-step-item .mdce-step-text {
    flex: 1;
    min-width: 0;
}

.mdce-next-step-item .mdce-step-text strong {
    display: block;
    font-weight: 600;
    color: var(--mdce-text);
    margin-bottom: var(--mdce-space-1);
}

.mdce-next-step-item .mdce-step-text p,
.mdce-next-step-item .mdce-step-text span {
    font-size: 0.875rem;
    color: var(--mdce-text-secondary);
    line-height: 1.55;
    margin: 0;
}

.mdce-next-step-item a {
    color: var(--mdce-primary);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--mdce-transition);
}

.mdce-next-step-item a:hover {
    color: var(--mdce-primary-hover);
    text-decoration: underline;
}


/* ==========================================================================
   5. Related Calculators
   ========================================================================== */

.mdce-related {
    padding-top: var(--mdce-space-2);
}

.mdce-related-title {
    font-family: var(--mdce-font);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--mdce-text);
    margin: 0 0 var(--mdce-space-4);
    line-height: 1.3;
}

.mdce-related-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--mdce-space-3);
}

/* ---- Individual related calculator card ---- */
.mdce-related-card {
    display: flex;
    align-items: center;
    gap: var(--mdce-space-3);
    padding: var(--mdce-space-4);
    background: var(--mdce-card-bg);
    border: 1px solid var(--mdce-border);
    border-radius: var(--mdce-radius);
    text-decoration: none;
    color: var(--mdce-text);
    transition: border-color var(--mdce-transition),
                box-shadow var(--mdce-transition),
                transform var(--mdce-transition);
}

.mdce-related-card:hover,
.mdce-related-card:focus-visible {
    border-color: var(--mdce-primary);
    box-shadow: var(--mdce-card-shadow-hover);
    transform: translateY(-2px);
    text-decoration: none;
    color: var(--mdce-text);
}

.mdce-related-card:focus-visible {
    outline: none;
    box-shadow: var(--mdce-focus-ring), var(--mdce-card-shadow-hover);
}

.mdce-related-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--mdce-radius);
    background: var(--mdce-bg-muted);
    font-size: 1.35rem;
    line-height: 1;
}

.mdce-related-name {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--mdce-text);
    line-height: 1.3;
}

.mdce-related-desc {
    display: block;
    font-size: 0.8rem;
    color: var(--mdce-text-muted);
    line-height: 1.4;
    margin-top: 2px;
}


/* ==========================================================================
   6. Related Blog Posts
   ========================================================================== */

.mdce-blog-posts {
    padding-top: var(--mdce-space-2);
}

.mdce-posts-list {
    display: flex;
    flex-direction: column;
    gap: var(--mdce-space-2);
}

.mdce-post-link {
    display: flex;
    align-items: center;
    gap: var(--mdce-space-2);
    padding: var(--mdce-space-3) var(--mdce-space-4);
    border-radius: var(--mdce-radius-sm);
    text-decoration: none;
    color: var(--mdce-text);
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 1.4;
    transition: background var(--mdce-transition),
                color var(--mdce-transition);
}

.mdce-post-link:hover,
.mdce-post-link:focus-visible {
    background: var(--mdce-bg-muted);
    color: var(--mdce-primary);
    text-decoration: none;
}

.mdce-post-link:focus-visible {
    outline: none;
    box-shadow: var(--mdce-focus-ring);
}

.mdce-post-arrow {
    flex-shrink: 0;
    color: var(--mdce-primary);
    font-weight: 700;
    font-size: 1rem;
    transition: transform var(--mdce-transition);
}

.mdce-post-link:hover .mdce-post-arrow {
    transform: translateX(3px);
}

.mdce-post-title {
    flex: 1;
    min-width: 0;
}


/* ==========================================================================
   7. Reminder Bar
   ========================================================================== */

.mdce-reminder-bar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--mdce-space-2);
    padding: var(--mdce-space-4) 0 0;
    border-top: 1px solid var(--mdce-border);
    font-size: 0.875rem;
    color: var(--mdce-text-secondary);
}

.mdce-reminder-bar > span {
    font-weight: 600;
    margin-right: var(--mdce-space-1);
}

.mdce-reminder-btn {
    display: inline-flex;
    align-items: center;
    padding: var(--mdce-space-1) var(--mdce-space-3);
    font-family: var(--mdce-font);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--mdce-primary);
    background: var(--mdce-primary-light);
    border: 1.5px solid transparent;
    border-radius: var(--mdce-radius-full);
    cursor: pointer;
    transition: background var(--mdce-transition),
                color var(--mdce-transition),
                border-color var(--mdce-transition);
    -webkit-appearance: none;
    appearance: none;
}

.mdce-reminder-btn:hover,
.mdce-reminder-btn:focus-visible {
    background: var(--mdce-primary);
    color: #ffffff;
}

.mdce-reminder-btn:focus-visible {
    outline: none;
    box-shadow: var(--mdce-focus-ring);
}

.mdce-reminder-btn:active {
    transform: scale(0.96);
}

/* Active/selected state after click */
.mdce-reminder-btn.mdce-reminder-set {
    background: var(--mdce-secondary);
    color: #ffffff;
    border-color: var(--mdce-secondary);
    pointer-events: none;
}


/* ==========================================================================
   8. Save Result Modal
   ========================================================================== */

.mdce-modal {
    position: fixed;
    inset: 0;
    z-index: var(--mdce-z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--mdce-overlay);
    padding: var(--mdce-space-4);
    animation: mdceFadeIn 0.2s ease;
}

.mdce-modal-content {
    position: relative;
    background: var(--mdce-card-bg);
    border-radius: var(--mdce-radius-lg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.18), 0 4px 16px rgba(0, 0, 0, 0.08);
    padding: var(--mdce-space-8);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    animation: mdceSlideUp 0.25s ease;
}

.mdce-modal-content h3 {
    font-family: var(--mdce-font);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--mdce-text);
    margin: 0 0 var(--mdce-space-2);
}

.mdce-modal-content > p {
    font-size: 0.9rem;
    color: var(--mdce-text-secondary);
    margin: 0 0 var(--mdce-space-6);
    line-height: 1.5;
}

/* ---- Close button ---- */
.mdce-modal-close {
    position: absolute;
    top: var(--mdce-space-3);
    right: var(--mdce-space-3);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--mdce-radius-full);
    background: transparent;
    color: var(--mdce-text-muted);
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    transition: background var(--mdce-transition), color var(--mdce-transition);
}

.mdce-modal-close:hover {
    background: var(--mdce-bg-muted);
    color: var(--mdce-text);
}

.mdce-modal-close:focus-visible {
    outline: none;
    box-shadow: var(--mdce-focus-ring);
}

/* ---- Save form ---- */
.mdce-save-form {
    display: flex;
    flex-direction: column;
    gap: var(--mdce-space-3);
}

.mdce-save-form label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--mdce-text);
    margin-bottom: calc(-1 * var(--mdce-space-1));
}

.mdce-save-form input[type="text"] {
    width: 100%;
    padding: var(--mdce-space-3) var(--mdce-space-4);
    font-family: var(--mdce-font);
    font-size: 0.95rem;
    color: var(--mdce-text);
    background: var(--mdce-bg-subtle);
    border: 1.5px solid var(--mdce-border);
    border-radius: var(--mdce-radius);
    transition: border-color var(--mdce-transition), box-shadow var(--mdce-transition);
    box-sizing: border-box;
}

.mdce-save-form input[type="text"]:focus {
    outline: none;
    border-color: var(--mdce-primary);
    box-shadow: var(--mdce-focus-ring);
}

.mdce-save-form input[type="text"]::placeholder {
    color: var(--mdce-text-muted);
}

.mdce-save-form .mdce-btn-save {
    margin-top: var(--mdce-space-2);
    justify-content: center;
    padding: var(--mdce-space-3) var(--mdce-space-6);
    font-size: 0.95rem;
}

/* ---- Privacy note ---- */
.mdce-privacy-note {
    font-size: 0.75rem;
    color: var(--mdce-text-muted);
    text-align: center;
    margin: var(--mdce-space-4) 0 0;
    line-height: 1.5;
}

.mdce-privacy-note::before {
    content: '\1F512 '; /* lock character — rendered from content, not hardcoded emoji */
    display: none; /* hidden by default; JS/PHP handles icons */
}


/* ==========================================================================
   9. Dark Mode Toggle (Floating)
   ========================================================================== */

.mdce-dark-toggle {
    position: fixed;
    bottom: var(--mdce-space-5);
    right: var(--mdce-space-5);
    z-index: var(--mdce-z-toggle);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: var(--mdce-radius-full);
    background: var(--mdce-card-bg);
    border: 1.5px solid var(--mdce-border);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: background var(--mdce-transition),
                border-color var(--mdce-transition),
                box-shadow var(--mdce-transition),
                transform var(--mdce-transition);
    color: var(--mdce-text);
}

.mdce-dark-toggle:hover {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    transform: scale(1.08);
    border-color: var(--mdce-primary);
}

.mdce-dark-toggle:focus-visible {
    outline: none;
    box-shadow: var(--mdce-focus-ring), 0 2px 12px rgba(0, 0, 0, 0.1);
}

.mdce-dark-toggle:active {
    transform: scale(0.95);
}

.mdce-dark-toggle svg {
    transition: opacity var(--mdce-transition), transform var(--mdce-transition-slow);
}


/* ==========================================================================
   10. Toast Notification
   ========================================================================== */

.mdce-notification {
    position: fixed;
    bottom: var(--mdce-space-8);
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    z-index: var(--mdce-z-notification);
    display: inline-flex;
    align-items: center;
    gap: var(--mdce-space-2);
    padding: var(--mdce-space-3) var(--mdce-space-6);
    font-family: var(--mdce-font);
    font-size: 0.9rem;
    font-weight: 600;
    color: #ffffff;
    background: var(--mdce-text);
    border-radius: var(--mdce-radius-full);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
    white-space: nowrap;
    max-width: calc(100vw - 2rem);
}

.mdce-notification.mdce-notification-visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

.mdce-notification.mdce-notification-success {
    background: var(--mdce-save);
}

.mdce-notification.mdce-notification-info {
    background: var(--mdce-primary);
}

.mdce-notification.mdce-notification-warning {
    background: var(--mdce-dashboard);
}


/* ==========================================================================
   11. Reminder Due Banner
   ========================================================================== */

.mdce-reminder-due {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--mdce-space-3);
    padding: var(--mdce-space-3) var(--mdce-space-4);
    background: linear-gradient(135deg, var(--mdce-primary-light), #dbeafe);
    border: 1px solid var(--mdce-primary);
    border-radius: var(--mdce-radius);
    font-family: var(--mdce-font);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--mdce-primary-hover);
    margin-bottom: var(--mdce-space-4);
    animation: mdcePulse 2s ease-in-out infinite;
}

.mdce-reminder-due a {
    color: var(--mdce-primary-hover);
    text-decoration: underline;
    font-weight: 700;
}

.mdce-reminder-due a:hover {
    color: var(--mdce-text);
}


/* ==========================================================================
   12. Animations
   ========================================================================== */

@keyframes mdceFadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes mdceSlideUp {
    from {
        opacity: 0;
        transform: translateY(24px) scale(0.97);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes mdcePulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(14, 165, 233, 0.25); }
    50%      { box-shadow: 0 0 0 8px rgba(14, 165, 233, 0); }
}

/* Fade-in for panel when it becomes visible */
.mdce-panel[style*="display: block"],
.mdce-panel.mdce-panel-visible {
    animation: mdceFadeIn 0.3s ease, mdceSlideUp 0.35s ease;
}


/* ==========================================================================
   13. Responsive Breakpoints
   ========================================================================== */

/* Tablet: 640px+ */
@media (min-width: 640px) {
    .mdce-related-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .mdce-action-bar {
        gap: var(--mdce-space-3);
    }

    .mdce-panel {
        padding: var(--mdce-space-8);
    }

    .mdce-next-step-item {
        padding: var(--mdce-space-4) var(--mdce-space-5);
    }
}

/* Desktop: 960px+ */
@media (min-width: 960px) {
    .mdce-related-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .mdce-related-card {
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
    }

    .mdce-related-icon {
        width: 48px;
        height: 48px;
        font-size: 1.5rem;
    }
}

/* Small mobile: ensure buttons stack on very narrow screens */
@media (max-width: 400px) {
    .mdce-action-bar {
        flex-direction: column;
    }

    .mdce-action-bar .mdce-btn {
        width: 100%;
        justify-content: center;
    }

    .mdce-reminder-bar {
        flex-direction: column;
        align-items: flex-start;
    }

    .mdce-modal-content {
        padding: var(--mdce-space-5);
    }

    .mdce-dark-toggle {
        width: 42px;
        height: 42px;
        bottom: var(--mdce-space-3);
        right: var(--mdce-space-3);
    }
}


/* ==========================================================================
   14. Reduced Motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .mdce-notification {
        transition: none;
    }
}


/* ==========================================================================
   15. High Contrast Mode Support
   ========================================================================== */

@media (forced-colors: active) {
    .mdce-btn {
        border: 2px solid ButtonText;
    }

    .mdce-related-card {
        border: 2px solid LinkText;
    }

    .mdce-modal-content {
        border: 2px solid CanvasText;
    }

    .mdce-dark-toggle {
        border: 2px solid ButtonText;
    }
}