/* ============================================================================
   UPTOWN HEALING. LEARN SIDEBAR
   Save as /CSS/pages/learn-sidebar.css

   Provides:
   . Two-column layout (sidebar + main content)
   . Collapsible sidebar groups
   . Sidebar topic links with active state
   . Landing page (hero + topic cards)
   . Topic section show/hide
   . Mobile: sidebar slides in from left, mobile toggle button

   Requires: learn-shell.css to be loaded FIRST (CSS variables).

   Icon policy: this file does not style icon elements. The sidebar,
   landing cards, and group headers are intentionally icon-free. Any
   leftover <i> nodes are hidden by the catch-all rule at the bottom.
   ============================================================================ */


/* ============================================================================
   LAYOUT. two-column grid (sidebar + main content)
   ============================================================================ */

   .learn-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 50px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 30px 40px 80px;
    align-items: start;
}

.learn-main-content {
    min-width: 0;
}


/* ============================================================================
   SIDEBAR
   ============================================================================ */

.learn-sidebar {
    position: sticky;
    top: 100px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    padding: 20px 0;
    background: transparent;

    scrollbar-width: thin;
    scrollbar-color: var(--gray-300) transparent;
}

.learn-sidebar::-webkit-scrollbar {
    width: 6px;
}

.learn-sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.learn-sidebar::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 3px;
}

.learn-sidebar::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}


/* ============================================================================
   SIDEBAR GROUPS. collapsible sections
   ============================================================================ */

.sidebar-group {
    margin-bottom: 28px;
}

.sidebar-group:last-child {
    margin-bottom: 0;
}

.sidebar-group-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 14px;
    cursor: pointer;
    user-select: none;
    transition: var(--transition);
    border-bottom: 1px solid var(--gray-200);
    margin-bottom: 10px;
}

.sidebar-group-header:hover {
    color: var(--primary);
}

.sidebar-group-header h3 {
    font-family: 'Libre Baskerville', serif;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--gray-600);
    margin: 0;
}

/* Collapse indicator. uses a CSS pseudo-element instead of a Font Awesome
   chevron so the sidebar stays icon-free. Plain plus/minus is universally
   recognized and renders identically across platforms. */
.sidebar-group-header::after {
    content: "\2212";          /* minus sign */
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    color: var(--gray-500);
    font-weight: 400;
    line-height: 1;
}

.sidebar-group.collapsed .sidebar-group-header::after {
    content: "+";
}

.sidebar-group-items {
    overflow: hidden;
    max-height: 800px;
    transition: max-height 0.3s ease, opacity 0.25s ease;
    opacity: 1;
}

.sidebar-group.collapsed .sidebar-group-items {
    max-height: 0;
    opacity: 0;
}


/* ============================================================================
   SIDEBAR TOPIC LINKS
   ============================================================================ */

.sidebar-topic-link {
    display: block;
    padding: 10px 14px;
    color: var(--text);
    text-decoration: none;
    font-family: 'Libre Baskerville', serif;
    font-size: 14px;
    font-weight: 400;
    line-height: 1.4;
    border-radius: 6px;
    border-left: 3px solid transparent;
    margin-bottom: 2px;
    transition: var(--transition);
}

.sidebar-topic-link:hover {
    background: var(--gray-50);
    color: var(--primary);
    padding-left: 18px;
}

.sidebar-topic-link.active {
    background: linear-gradient(90deg, rgba(127, 169, 155, 0.12) 0%, rgba(127, 169, 155, 0.04) 100%);
    color: var(--primary-dark);
    font-weight: 600;
    border-left-color: var(--primary);
    padding-left: 18px;
}


/* ============================================================================
   LANDING PAGE. hero + cards grid
   ============================================================================ */

#learn-landing {
    padding: 20px 0;
}

.landing-hero {
    background: linear-gradient(135deg, rgba(127, 169, 155, 0.06) 0%, rgba(143, 181, 165, 0.04) 100%);
    border-left: 4px solid var(--primary);
    border-radius: 0 12px 12px 0;
    padding: 36px 40px;
    margin-bottom: 50px;
}

.landing-hero h1 {
    font-family: 'Libre Baskerville', serif;
    font-size: 32px;
    font-weight: 400;
    color: var(--dark);
    margin: 0 0 14px 0;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.landing-hero p {
    font-family: 'Libre Baskerville', serif;
    font-size: 16px;
    color: var(--text);
    line-height: 1.7;
    margin: 0;
    max-width: 720px;
}


.landing-section-title {
    font-family: 'Libre Baskerville', serif;
    font-size: 24px;
    font-weight: 400;
    color: var(--dark);
    margin: 40px 0 22px 0;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--gray-200);
    letter-spacing: -0.02em;
}

.landing-section-title:first-of-type {
    margin-top: 0;
}


.landing-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 22px;
    margin-bottom: 30px;
}


/* Individual topic card. icon-free, relies on the accent strip and the
   card body itself for visual interest. */
.landing-topic-card {
    display: block;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 10px;
    padding: 26px 24px;
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.landing-topic-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.landing-topic-card:hover {
    border-color: var(--primary-light);
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(127, 169, 155, 0.15);
}

.landing-topic-card:hover::before {
    transform: scaleX(1);
}

.landing-card-title {
    font-family: 'Libre Baskerville', serif;
    font-size: 18px;
    font-weight: 600;
    color: var(--dark);
    margin: 0 0 10px 0;
    line-height: 1.3;
}

.landing-card-desc {
    font-family: 'Libre Baskerville', serif;
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.6;
    margin: 0;
}


/* ============================================================================
   TOPIC SECTIONS. show/hide
   ============================================================================ */

.topic-section {
    display: none;
    animation: topicFadeIn 0.3s ease;
}

.topic-section.active {
    display: block;
}

@keyframes topicFadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}


.topic-section .content-section {
    max-width: 900px;
    margin: 0;
}


/* ============================================================================
   MOBILE TOPICS TOGGLE BUTTON
   ============================================================================ */

.mobile-topics-toggle {
    display: none;
    align-items: center;
    padding: 10px 20px;
    background: var(--white);
    border: 1.5px solid var(--gray-300);
    border-radius: 50px;
    color: var(--text);
    font-family: 'Libre Baskerville', serif;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: 24px;
    transition: var(--transition);
}

.mobile-topics-toggle:hover {
    border-color: var(--primary);
    color: var(--primary);
}


/* Mobile sidebar backdrop */
.sidebar-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(47, 62, 54, 0.5);
    z-index: 9990;
    opacity: 0;
    transition: opacity 0.25s ease;
}

.sidebar-backdrop.visible {
    display: block;
    opacity: 1;
}


/* ============================================================================
   RESPONSIVE
   ============================================================================ */

@media (max-width: 1200px) {
    .learn-layout {
        grid-template-columns: 240px 1fr;
        gap: 36px;
        padding: 30px 30px 70px;
    }

    .landing-hero {
        padding: 30px 32px;
    }

    .landing-hero h1 {
        font-size: 28px;
    }
}


@media (max-width: 992px) {
    .learn-layout {
        grid-template-columns: 1fr;
        gap: 0;
        padding: 30px 30px 70px;
    }

    .learn-sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: 300px;
        max-width: 85vw;
        height: 100vh;
        max-height: 100vh;
        background: var(--white);
        z-index: 9995;
        padding: 30px 24px 30px 24px;
        box-shadow: 4px 0 20px rgba(0, 0, 0, 0.12);
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
    }

    .learn-sidebar.open {
        transform: translateX(0);
    }

    .mobile-topics-toggle {
        display: inline-flex;
    }

    .landing-hero {
        padding: 28px 24px;
        margin-bottom: 36px;
    }

    .landing-hero h1 {
        font-size: 26px;
    }

    .landing-section-title {
        font-size: 22px;
    }
}


@media (max-width: 768px) {
    .learn-layout {
        padding: 20px 20px 60px;
    }

    .landing-hero {
        padding: 24px 20px;
    }

    .landing-hero h1 {
        font-size: 24px;
    }

    .landing-hero p {
        font-size: 15px;
    }

    .landing-section-title {
        font-size: 20px;
    }

    .landing-cards-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .landing-topic-card {
        padding: 22px 20px;
    }

    .landing-card-title {
        font-size: 17px;
    }

    .learn-sidebar {
        width: 280px;
        padding: 24px 20px;
    }

    .sidebar-topic-link {
        padding: 12px 14px;
        font-size: 15px;
    }
}


@media (max-width: 480px) {
    .learn-layout {
        padding: 16px 16px 50px;
    }

    .landing-hero {
        padding: 20px 16px;
        margin-bottom: 28px;
    }

    .landing-hero h1 {
        font-size: 22px;
    }

    .mobile-topics-toggle {
        font-size: 13px;
        padding: 9px 16px;
    }
}


/* ============================================================================
   ICON-FREE GUARANTEE
   The Learn section is intentionally icon-free. Hide any Font Awesome or
   Boxicons elements that may have been carried over from cached templates
   so they cannot disrupt layout.
   ============================================================================ */

.learn-sidebar i.fas,
.learn-sidebar i.far,
.learn-sidebar i.fab,
.learn-sidebar i.fa,
.learn-sidebar i.bx,
.learn-sidebar i.bxs,
.learn-sidebar i.bxl,
.landing-topic-card i.fas,
.landing-topic-card i.far,
.landing-topic-card i.fab,
.landing-topic-card i.fa,
.landing-topic-card i.bx,
.landing-card-icon,
.mobile-topics-toggle i {
    display: none !important;
}