/* =============================================================
 FILE: Content-Hub.css
 PURPOSE: Global CSS include for Content Hub, shared across multiple pages.

 USED BY:
   - /Content/Includes/Content-Head.php
   - /FAQ/index.php
 ============================================================= */
/* Content Hub CSS - Hero, Article Card Grid, Category Tags */

/* === Hub Hero === */
.hub-hero {
    padding: 48px 24px 56px;
    text-align: center;
    background: var(--content-bg-alt);
    border-bottom: 1px solid var(--content-border);
}

.hub-hero-inner {
    max-width: 680px;
    margin: 0 auto;
}

.hub-hero-label {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--content-accent-green);
    margin-bottom: 14px;
}

.hub-hero h1 {
    font-family: var(--content-font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -0.03em;
    color: var(--content-text);
    margin-bottom: 18px;
}

.hub-hero p {
    font-size: 1.05rem;
    color: var(--content-text-secondary);
    line-height: 1.7;
    font-weight: 400;
}

/* === Hub Filter Bar === */
.hub-filter-bar {
    display: flex;
    justify-content: center;
    gap: 10px;
    padding: 24px 24px 0;
    max-width: 1180px;
    margin: 0 auto;
}

.hub-filter-btn {
    font-family: var(--content-font-display);
    font-size: 0.88rem;
    font-weight: 400;
    padding: 10px 24px;
    border: 1px solid var(--content-border);
    border-radius: var(--content-radius-sm);
    background: var(--content-surface);
    color: var(--content-text-muted);
    cursor: pointer;
    transition: color 220ms cubic-bezier(0.4, 0.0, 0.2, 1), border-color 220ms cubic-bezier(0.4, 0.0, 0.2, 1), background 220ms cubic-bezier(0.4, 0.0, 0.2, 1), box-shadow 220ms cubic-bezier(0.4, 0.0, 0.2, 1);
}

.hub-filter-btn:hover {
    border-color: var(--content-border-med);
    color: var(--content-text);
}

.hub-filter-btn.active {
    border-color: var(--content-accent);
    color: var(--content-accent);
    background: var(--content-accent-light);
    box-shadow:
        0 1px 2px rgba(0,0,0,0.02),
        0 3px 8px rgba(0,0,0,0.04),
        0 6px 16px rgba(0,0,0,0.03);
}

.hub-card.hub-card-hidden {
    display: none;
}

/* === Hub Content === */
.hub-content {
    max-width: 1180px;
    margin: 0 auto;
    padding: 48px 24px 80px;
}

/* === Article Card Grid === */
.hub-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 28px;
}

.hub-card {
    display: flex;
    flex-direction: column;
    padding: 32px 28px;
    background: var(--content-surface);
    border: 1px solid var(--content-border);
    border-radius: var(--content-radius-lg);
    transition: transform var(--content-transition), border-color var(--content-transition), box-shadow var(--content-transition);
    box-shadow: var(--content-shadow-card);
    text-decoration: none;
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(28px);
}

.hub-card.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 700ms var(--ease-reveal), transform 700ms var(--ease-reveal), box-shadow var(--content-transition), border-color var(--content-transition);
}

.hub-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--content-accent), var(--content-accent-green));
    opacity: 0;
    transition: opacity var(--content-transition);
}

.hub-card:hover {
    transform: translateY(-4px);
    border-color: var(--content-border-med);
    box-shadow: var(--content-shadow-layered);
}

.hub-card:hover::before {
    opacity: 1;
}

.hub-card-category {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--content-accent-green);
    margin-bottom: 14px;
    padding: 4px 12px;
    background: rgba(14, 159, 110, 0.07);
    border-radius: var(--content-radius-sm);
    align-self: flex-start;
}

.hub-card-category.guide { color: var(--content-accent); background: var(--content-accent-light); }
.hub-card-category.blog { color: var(--content-accent-green); background: rgba(14, 159, 110, 0.07); }
.hub-card-category.resource { color: #e67e22; background: rgba(230, 126, 34, 0.07); }

.hub-card h2 {
    font-family: var(--content-font-display);
    font-size: 1.15rem;
    font-weight: 400;
    color: var(--content-text);
    margin-bottom: 10px;
    line-height: 1.3;
}

.hub-card p {
    font-size: 0.88rem;
    color: var(--content-text-muted);
    line-height: 1.65;
    flex: 1;
    margin-bottom: 16px;
}

.hub-card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.78rem;
    color: var(--content-text-muted);
    padding-top: 14px;
    border-top: 1px solid var(--content-border);
}

.hub-card-read {
    color: var(--content-accent);
    font-weight: 600;
    margin-left: auto;
}

/* === Featured Card (Blog Hub) === */
.hub-featured {
    margin-bottom: 48px;
}

.hub-featured-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    padding: 40px 36px;
    background: var(--content-surface);
    border: 1px solid var(--content-border);
    border-radius: var(--content-radius-lg);
    box-shadow: var(--content-shadow-layered);
    text-decoration: none;
    transition: transform var(--content-transition), box-shadow var(--content-transition), border-color var(--content-transition);
    position: relative;
    overflow: hidden;
}

.hub-featured-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--content-accent), var(--content-accent-green));
}

.hub-featured-card:hover {
    box-shadow:
        0 4px 8px rgba(0,0,0,0.03),
        0 12px 24px rgba(0,0,0,0.05),
        0 32px 64px rgba(0,0,0,0.07),
        0 64px 128px rgba(0,0,0,0.09);
}

.hub-featured-label {
    display: inline-block;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--content-accent);
    margin-bottom: 12px;
    padding: 4px 14px;
    background: var(--content-accent-light);
    border-radius: var(--content-radius-sm);
}

.hub-featured-card h2 {
    font-family: var(--content-font-display);
    font-size: clamp(1.4rem, 3vw, 1.8rem);
    font-weight: 400;
    color: var(--content-text);
    margin-bottom: 14px;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.hub-featured-card p {
    font-size: 0.95rem;
    color: var(--content-text-secondary);
    line-height: 1.7;
}

.hub-featured-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.hub-featured-orb {
    width: 200px;
    height: 200px;
    border-radius: 63% 37% 54% 46% / 55% 48% 52% 45%;
    background: linear-gradient(145deg, rgba(26, 86, 219, 0.1), rgba(14, 159, 110, 0.08));
    border: 1px solid var(--content-border);
    animation: hub-orb-morph 10000ms cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes hub-orb-morph {
    0%, 100% { border-radius: 63% 37% 54% 46% / 55% 48% 52% 45%; }
    33% { border-radius: 37% 63% 46% 54% / 48% 55% 45% 52%; }
    66% { border-radius: 54% 46% 37% 63% / 52% 45% 55% 48%; }
}

/* === Section Header for Hub === */
.hub-section-header {
    margin-bottom: 32px;
}

.hub-section-header h2 {
    font-family: var(--content-font-display);
    font-size: 1.4rem;
    font-weight: 400;
    color: var(--content-text);
    letter-spacing: -0.01em;
}

/* === FAQ page (hub FAQ only; scoped under .faq-page) === */
.faq-page .hub-hero h1 {
    font-weight: 600;
    letter-spacing: -0.025em;
}

.faq-page .hub-hero-label {
    letter-spacing: 2.2px;
}

/* Table of contents: jump links for skimmers */
.faq-toc {
    margin-bottom: 36px;
    padding: 22px 24px;
    background: var(--content-surface);
    border: 1px solid var(--content-border);
    border-radius: var(--content-radius-lg);
    box-shadow: var(--content-shadow-card);
}

.faq-toc-label {
    display: block;
    font-family: var(--content-font-display);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--content-text);
    margin-bottom: 6px;
    letter-spacing: -0.01em;
}

.faq-toc-hint {
    font-size: 0.84rem;
    color: var(--content-text-muted);
    line-height: 1.55;
    margin: 0 0 16px;
}

.faq-toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 10px 14px;
}

.faq-toc-list a {
    display: inline-flex;
    align-items: center;
    font-size: 0.86rem;
    font-weight: 600;
    color: var(--content-accent);
    text-decoration: none;
    padding: 8px 14px;
    border: 1px solid var(--content-border);
    border-radius: var(--content-radius-sm);
    background: var(--content-bg-alt);
    transition: border-color var(--content-transition), background var(--content-transition), color var(--content-transition);
}

.faq-toc-list a:hover {
    border-color: var(--content-accent);
    background: var(--content-accent-light);
    color: var(--content-accent);
}

/* === FAQ Hub Specific === */
.faq-hub-categories {
    display: flex;
    flex-direction: column;
    gap: 48px;
}

.faq-page .faq-category {
    scroll-margin-top: 96px;
}

.faq-page .faq-category h2 {
    font-family: var(--content-font-display);
    font-size: clamp(1.25rem, 2.5vw, 1.55rem);
    font-weight: 600;
    color: var(--content-text);
    margin: 0 0 20px;
    padding: 0 0 14px 16px;
    border-bottom: none;
    border-left: 3px solid var(--content-accent);
    line-height: 1.25;
    letter-spacing: -0.02em;
}

.faq-hub-categories .faq-accordion {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.faq-hub-categories .faq-item {
    border: 1px solid var(--content-border);
    border-radius: var(--content-radius-md);
    overflow: hidden;
    transition: border-color var(--content-transition);
}

.faq-hub-categories .faq-item:hover {
    border-color: var(--content-border-med);
}

.faq-hub-categories .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 18px 20px;
    font-family: var(--content-font-body);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--content-text);
    background: var(--content-bg);
    border: none;
    cursor: pointer;
    text-align: left;
    transition: background-color var(--content-transition);
}

.faq-hub-categories .faq-question:hover {
    background: var(--content-bg-alt);
}

.faq-hub-categories .faq-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    font-size: 1.1rem;
    font-weight: 300;
    line-height: 1;
    color: var(--content-accent);
    border: 1px solid var(--content-border);
    border-radius: var(--content-radius-sm);
    transition: transform var(--content-transition), border-color var(--content-transition);
    flex-shrink: 0;
    margin-left: 16px;
}

.faq-hub-categories .faq-item.open .faq-icon {
    transform: rotate(45deg);
    border-color: var(--content-accent);
}

/* Grid row animation: full answer height without arbitrary max-height */
.faq-hub-categories .faq-answer {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 320ms cubic-bezier(0.4, 0.0, 0.2, 1);
}

.faq-hub-categories .faq-item.open .faq-answer {
    grid-template-rows: 1fr;
}

.faq-hub-categories .faq-answer-inner {
    overflow: hidden;
    min-height: 0;
}

.faq-hub-categories .faq-answer-inner > *:first-child {
    margin-top: 0;
}

.faq-hub-categories .faq-answer p {
    padding: 0 20px 16px;
    margin: 0;
    font-size: 0.92rem;
    line-height: 1.7;
    color: var(--content-text-secondary);
}

.faq-hub-categories .faq-answer p:first-child {
    padding-top: 4px;
}

.faq-hub-categories .faq-answer p:last-child {
    padding-bottom: 18px;
}

.faq-hub-categories .faq-answer a {
    color: var(--content-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.faq-hub-categories .faq-answer a:hover {
    text-decoration-thickness: 2px;
}

.faq-hub-categories .faq-answer-inner ul,
.faq-hub-categories .faq-answer-inner ol {
    margin: 0 20px 18px;
    padding-left: 1.35rem;
    font-size: 0.92rem;
    line-height: 1.65;
    color: var(--content-text-secondary);
}

/* === Responsive === */
@media (max-width: 900px) {
    .hub-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }

    .hub-featured-card {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .hub-featured-visual {
        display: none;
    }
}

@media (max-width: 768px) {
    .faq-toc {
        padding: 18px 16px;
        margin-bottom: 28px;
    }

    .faq-toc-list {
        flex-direction: column;
    }

    .faq-toc-list a {
        width: 100%;
        justify-content: center;
    }

    .faq-page .faq-category {
        scroll-margin-top: 72px;
    }

    .faq-page .faq-category h2 {
        padding-left: 12px;
        font-size: 1.2rem;
    }

    .hub-hero {
        padding: 36px 16px 40px;
    }

    .hub-content {
        padding: 32px 16px 60px;
    }

    .hub-grid {
        grid-template-columns: 1fr;
    }

    .hub-featured-card {
        padding: 28px 24px;
    }
}

@media (max-width: 480px) {
    .hub-card {
        padding: 24px 20px;
    }

    .hub-filter-bar {
        flex-wrap: wrap;
        padding: 16px 16px 0;
        gap: 8px;
    }

    .hub-filter-btn {
        font-size: 0.82rem;
        padding: 8px 16px;
    }
}

/* 320px - Extra small screens */
@media (max-width: 320px) {
    .hub-hero {
        padding: 28px 10px 32px;
    }

    .hub-hero h1 {
        font-size: clamp(1.6rem, 8vw, 2rem);
    }

    .hub-hero p {
        font-size: 0.92rem;
    }

    .hub-content {
        padding: 24px 10px 48px;
    }

    .hub-card {
        padding: 20px 14px;
    }

    .hub-card h2 {
        font-size: 1.05rem;
    }

    .hub-card p {
        font-size: 0.84rem;
    }

    .hub-featured-card {
        padding: 22px 14px;
    }

    .hub-filter-bar {
        padding: 12px 10px 0;
    }

    .hub-filter-btn {
        font-size: 0.78rem;
        padding: 7px 12px;
    }
}

/* Touch targets for coarse pointers */
@media (hover: none) and (pointer: coarse) {
    .hub-filter-btn {
        min-height: 48px;
        display: inline-flex;
        align-items: center;
    }

    .hub-card {
        min-height: 48px;
    }

    .hub-card-meta .hub-card-read {
        min-height: 48px;
        display: inline-flex;
        align-items: center;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .hub-card {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .hub-card.visible {
        transition: none;
    }

    .hub-featured-orb {
        animation: none;
    }

    .faq-hub-categories .faq-answer {
        transition: none;
    }

    .faq-hub-categories .faq-icon {
        transition: none;
    }
}