/* ============================================================
   BRAINFLOOD HOST RESOURCE LIBRARY — Shared Styles
   Uses theme variables from /css/themes.css
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600;700&display=swap');

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* Local tokens (non-theme) */
:root {
    --radius: 16px;
    --radius-sm: 10px;
    --radius-xs: 6px;
    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --glass: rgba(var(--glass-overlay-color), 0.03);
    --glass-hover: rgba(var(--glass-overlay-color), 0.06);
    --border: rgba(var(--glass-overlay-color), 0.06);
}

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 { font-family: var(--font-display); line-height: 1.2; }

a { color: var(--accent-light); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-secondary); }

/* Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--bg-tertiary); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ============================================================
   AMBIENT BACKGROUND
   ============================================================ */
.ambient-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(ellipse 800px 600px at 20% 20%, var(--glow-primary), transparent),
        radial-gradient(ellipse 600px 400px at 80% 80%, var(--glow-secondary), transparent),
        radial-gradient(ellipse 400px 300px at 50% 50%, var(--glow-tertiary), transparent);
    animation: drift 30s ease-in-out infinite alternate;
}

@keyframes drift {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-20px, 15px) scale(1.02); }
    100% { transform: translate(10px, -10px) scale(0.98); }
}

/* Noise overlay */
.noise-overlay {
    position: fixed;
    inset: 0;
    z-index: -1;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    pointer-events: none;
}

/* ============================================================
   NAV BAR
   ============================================================ */
.library-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(var(--color-base-darkest-rgb), 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 1.5rem;
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
}

.nav-brand img { height: 32px; width: auto; }

.nav-brand-text {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.1rem;
}

.nav-brand-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 400;
}

.nav-links {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
}

.nav-link {
    padding: 0.4rem 0.85rem;
    border-radius: var(--radius-xs);
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: all 0.2s;
    white-space: nowrap;
}

.nav-link:hover { color: var(--text-primary); background: var(--glass-hover); }

.nav-link.active { color: var(--accent-light); background: rgba(var(--accent-rgb), 0.15); }

.nav-cta {
    padding: 0.5rem 1.25rem;
    background: var(--accent);
    color: var(--btn-accent-text, #fff);
    border-radius: var(--radius-xs);
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.25s;
}

.nav-cta:hover { background: var(--accent-dark); color: var(--btn-accent-text, #fff); transform: translateY(-1px); box-shadow: 0 4px 20px rgba(var(--accent-rgb), 0.4); }

/* Mobile nav */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
}

@media (max-width: 768px) {
    .nav-toggle { display: block; }
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(var(--color-base-darkest-rgb), 0.95);
        backdrop-filter: blur(20px);
        padding: 1rem;
        flex-direction: column;
        border-bottom: 1px solid var(--border);
    }
    .nav-links.open { display: flex; }
    .nav-link { padding: 0.6rem 1rem; width: 100%; }
}

/* ============================================================
   HERO (for hub page)
   ============================================================ */
.hero {
    text-align: center;
    padding: 5rem 1.5rem 3rem;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    background: rgba(var(--accent-rgb), 0.15);
    border: 1px solid rgba(var(--accent-rgb), 0.3);
    border-radius: 999px;
    font-size: 0.8rem;
    color: var(--accent-light);
    font-weight: 600;
    margin-bottom: 1.5rem;
    letter-spacing: 0.03em;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-light) 50%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 650px;
    margin: 0 auto 2rem;
}

/* ============================================================
   SECTION CONTAINERS
   ============================================================ */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.container-narrow { max-width: 800px; margin: 0 auto; padding: 0 1.5rem; }

.section { padding: 4rem 0; }
.section-alt { background: var(--bg-secondary); }

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================================
   CARDS
   ============================================================ */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.card-grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card:hover {
    border-color: rgba(var(--accent-rgb), 0.3);
    background: var(--glass-hover);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(var(--glass-overlay-color-inv), 0.3);
}

.card-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
    background: rgba(var(--accent-rgb), 0.15);
    color: var(--accent-light);
}

.card-icon.cyan { background: rgba(var(--secondary-rgb), 0.15); color: var(--color-secondary); }
.card-icon.green { background: rgba(var(--success-rgb), 0.15); color: var(--color-success); }
.card-icon.pink { background: rgba(var(--pink-rgb), 0.15); color: var(--color-pink); }
.card-icon.orange { background: rgba(var(--orange-rgb), 0.15); color: var(--color-orange); }
.card-icon.yellow { background: rgba(var(--warning-rgb), 0.15); color: var(--color-warning); }

.card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-light);
    transition: gap 0.2s;
}

.card-link:hover { gap: 0.6rem; color: var(--color-secondary); }

/* Clickable card wrapper */
a.card { text-decoration: none; color: inherit; display: block; }
a.card h3 { color: var(--text-primary); }

/* ============================================================
   ARTICLE LAYOUT
   ============================================================ */
.article-header {
    padding: 4rem 1.5rem 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.article-tag {
    padding: 0.3rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tag-guide { background: rgba(var(--accent-rgb), 0.15); color: var(--accent-light); }
.tag-business { background: rgba(var(--success-rgb), 0.15); color: var(--color-success); }
.tag-equipment { background: rgba(var(--secondary-rgb), 0.15); color: var(--color-secondary); }
.tag-training { background: rgba(var(--warning-rgb), 0.15); color: var(--color-warning); }
.tag-faq { background: rgba(var(--pink-rgb), 0.15); color: var(--color-pink); }
.tag-whitepaper { background: rgba(var(--orange-rgb), 0.15); color: var(--color-orange); }

.article-read-time {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.article-header h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.15;
}

.article-header .lead {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Article body */
.article-body {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1.5rem 4rem;
}

.article-body h2 {
    font-size: 1.6rem;
    font-weight: 700;
    margin: 3rem 0 1rem;
    padding-top: 1rem;
}

.article-body h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 2rem 0 0.75rem;
}

.article-body p {
    margin-bottom: 1.25rem;
    color: var(--text-secondary);
    font-size: 1rem;
}

.article-body ul, .article-body ol {
    margin: 0 0 1.5rem 1.5rem;
    color: var(--text-secondary);
}

.article-body li {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.article-body li strong { color: var(--text-primary); }

.article-body strong { color: var(--text-primary); }

.article-body blockquote {
    border-left: 3px solid var(--accent);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    background: var(--glass);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-secondary);
    font-style: italic;
}

.article-body hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2.5rem 0;
}

/* ============================================================
   CALLOUT BOXES
   ============================================================ */
.callout {
    border-radius: var(--radius-sm);
    padding: 1.5rem;
    margin: 1.5rem 0;
    border: 1px solid var(--border);
}

.callout-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.callout p { margin-bottom: 0.5rem; font-size: 0.9rem; }
.callout p:last-child { margin-bottom: 0; }

.callout-tip {
    background: rgba(var(--success-rgb), 0.08);
    border-color: rgba(var(--success-rgb), 0.2);
}
.callout-tip .callout-title { color: var(--color-success); }

.callout-money {
    background: rgba(var(--warning-rgb), 0.08);
    border-color: rgba(var(--warning-rgb), 0.2);
}
.callout-money .callout-title { color: var(--color-warning); }

.callout-warning {
    background: rgba(var(--orange-rgb), 0.08);
    border-color: rgba(var(--orange-rgb), 0.2);
}
.callout-warning .callout-title { color: var(--color-orange); }

.callout-info {
    background: rgba(var(--accent-rgb), 0.08);
    border-color: rgba(var(--accent-rgb), 0.2);
}
.callout-info .callout-title { color: var(--accent-light); }

/* ============================================================
   COMPARISON TABLE
   ============================================================ */
.comparison-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: 1.5rem 0;
    font-size: 0.9rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.comparison-table th {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-family: var(--font-display);
    font-weight: 600;
    padding: 0.85rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.comparison-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}

.comparison-table tr:last-child td { border-bottom: none; }

.comparison-table tr:hover td { background: var(--glass-hover); }

.highlight-row td {
    background: rgba(var(--accent-rgb), 0.08) !important;
    color: var(--text-primary);
    font-weight: 500;
}

.positive { color: var(--color-success) !important; font-weight: 600; }
.negative { color: var(--color-danger) !important; }

/* ============================================================
   EQUIPMENT TIERS
   ============================================================ */
.tier-card {
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    margin-bottom: 2rem;
    position: relative;
}

.tier-card.recommended {
    border-color: rgba(var(--accent-rgb), 0.5);
    box-shadow: 0 0 40px rgba(var(--accent-rgb), 0.1);
}

.tier-badge {
    position: absolute;
    top: -12px;
    right: 24px;
    padding: 0.3rem 1rem;
    background: var(--accent);
    color: var(--btn-accent-text, #fff);
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 999px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tier-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tier-header h3 {
    font-size: 1.3rem;
    font-weight: 700;
}

.tier-price {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-success);
}

.tier-items {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tier-items li {
    display: flex;
    justify-content: space-between;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
    color: var(--text-secondary);
    align-items: flex-start;
    gap: 1rem;
}

.tier-items li:last-child { border-bottom: none; }

.tier-item-name { flex: 1; }
.tier-item-price { color: var(--text-muted); font-family: var(--font-display); font-weight: 500; white-space: nowrap; }
.tier-item-note { font-size: 0.8rem; color: var(--text-muted); }

/* ============================================================
   FAQ ACCORDION
   ============================================================ */
.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 0.75rem;
    overflow: hidden;
}

.faq-question {
    width: 100%;
    background: var(--glass);
    border: none;
    color: var(--text-primary);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    text-align: left;
    padding: 1.15rem 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    transition: background 0.2s;
}

.faq-question:hover { background: var(--glass-hover); }

.faq-chevron {
    transition: transform 0.3s ease;
    flex-shrink: 0;
    color: var(--text-muted);
}

.faq-item.open .faq-chevron { transform: rotate(180deg); }

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
}

.faq-item.open .faq-answer {
    max-height: 1000px;
}

.faq-answer-inner {
    padding: 0 1.25rem 1.25rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ============================================================
   STATS ROW
   ============================================================ */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.stat-card {
    text-align: center;
    padding: 1.5rem;
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-light);
    line-height: 1;
    margin-bottom: 0.35rem;
}

.stat-number.green { color: var(--color-success); }
.stat-number.cyan { color: var(--color-secondary); }
.stat-number.pink { color: var(--color-pink); }
.stat-number.orange { color: var(--color-orange); }
.stat-number.yellow { color: var(--color-warning); }

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================================
   CTA SECTION
   ============================================================ */
.cta-section {
    text-align: center;
    padding: 5rem 1.5rem;
    position: relative;
}

.cta-section h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-section p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 550px;
    margin: 0 auto 2rem;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    background: var(--accent);
    color: var(--btn-accent-text, #fff);
    border: none;
    border-radius: var(--radius-xs);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s;
    text-decoration: none;
}

.btn-primary:hover {
    background: var(--accent-dark);
    color: var(--btn-accent-text, #fff);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(var(--accent-rgb), 0.4);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s;
    text-decoration: none;
}

.btn-secondary:hover {
    border-color: rgba(var(--accent-rgb), 0.5);
    background: var(--glass-hover);
    color: var(--text-primary);
}

.btn-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================================
   FOOTER
   ============================================================ */
.library-footer {
    padding: 3rem 1.5rem;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.library-footer a { color: var(--text-secondary); }
.library-footer a:hover { color: var(--accent-light); }

.footer-links {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

/* ============================================================
   BREADCRUMB
   ============================================================ */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 0 0;
    font-size: 0.85rem;
    color: var(--text-muted);
    max-width: 800px;
    margin: 0 auto;
    padding-left: 1.5rem;
}

.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent-light); }
.breadcrumb-sep { color: var(--text-muted); opacity: 0.5; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 640px) {
    .card-grid, .card-grid-3 { grid-template-columns: 1fr; }
    .stats-row { grid-template-columns: repeat(2, 1fr); }
    .section { padding: 2.5rem 0; }
    .hero { padding: 3rem 1rem 2rem; }
    .article-header { padding: 2.5rem 1rem 1.5rem; }
    .article-body { padding: 0 1rem 3rem; }
    .tier-header { flex-direction: column; align-items: flex-start; }
}

/* ============================================================
   ARTICLE NAVIGATION (prev/next)
   ============================================================ */
.article-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin: 3rem 0;
    max-width: 800px;
    padding: 0 1.5rem;
    margin-left: auto;
    margin-right: auto;
}

.article-nav-link {
    display: block;
    padding: 1.25rem;
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: all 0.3s;
}

.article-nav-link:hover {
    border-color: rgba(var(--accent-rgb), 0.3);
    background: var(--glass-hover);
    transform: translateY(-2px);
}

.article-nav-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.article-nav-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.article-nav-link.next { text-align: right; }

@media (max-width: 640px) {
    .article-nav { grid-template-columns: 1fr; }
}

/* ============================================================
   PRINT STYLES
   ============================================================ */
@media print {
    .ambient-bg, .noise-overlay, .library-nav { display: none; }
    body { background: #fff; color: #000; }
    .card { border: 1px solid #ddd; }
}