/* =========================================================
   VitruAI Design System
   Light theme: drafting-paper cream + graphite + blueprint cyan.
   Tokens consumed by style.css, content.css, template CSS.
   ========================================================= */

:root {
    /* Surface */
    --bg-base:       #F7F5EE;
    --bg-card:       #FFFFFF;
    --bg-card-alt:   #F0EDE2;
    --bg-inverse:    #14161C;

    /* Ink */
    --ink-primary:   #1C1D22;
    --ink-secondary: #5A5D66;
    --ink-muted:     #9A9DA4;
    --ink-on-dark:   #F0EDE2;

    /* Accent */
    --accent-primary: #0E84A5;
    --accent-hover:   #0B6C88;
    --accent-glow:    rgba(14, 132, 165, 0.25);

    /* Status */
    --status-live:    #00B67A;
    --status-beta:    #0E84A5;
    --status-roadmap: #9A9DA4;
    --status-labs:    #C49A4A;

    /* Lines + shadow */
    --border-hairline: rgba(28, 29, 34, 0.08);
    --border-strong:   rgba(28, 29, 34, 0.18);
    --shadow-card:     0 2px 16px rgba(28, 29, 34, 0.06);
    --shadow-card-lg:  0 8px 40px rgba(28, 29, 34, 0.12);

    /* Radius */
    --radius-sm:  6px;
    --radius-md:  12px;
    --radius-lg:  16px;
    --radius-xl:  24px;
    --radius-pill: 9999px;

    /* Space scale */
    --s-1:  4px;
    --s-2:  8px;
    --s-3: 12px;
    --s-4: 16px;
    --s-5: 24px;
    --s-6: 32px;
    --s-7: 48px;
    --s-8: 64px;
    --s-9: 96px;
    --s-10: 128px;

    /* Type scale (clamp for responsive without JS) */
    --fs-xs:   0.75rem;
    --fs-sm:   0.875rem;
    --fs-base: 1rem;
    --fs-md:   1.125rem;
    --fs-lg:   1.25rem;
    --fs-xl:   1.5rem;
    --fs-2xl:  2rem;
    --fs-3xl:  clamp(2rem, 4vw, 3rem);
    --fs-4xl:  clamp(2.5rem, 6vw, 4.5rem);
    --fs-5xl:  clamp(3rem, 8vw, 5.5rem);

    /* Font */
    --ff-display: 'Inter', 'Söhne', system-ui, -apple-system, 'Segoe UI', sans-serif;
    --ff-body:    'Inter', 'Söhne', system-ui, -apple-system, 'Segoe UI', sans-serif;
    --ff-mono:    'JetBrains Mono', 'IBM Plex Mono', ui-monospace, Menlo, Consolas, monospace;

    /* Container */
    --container-wide: 1280px;
    --container-read: 720px;
}

/* Base reset */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    font-family: var(--ff-body);
    font-size: var(--fs-md);
    line-height: 1.65;
    color: var(--ink-primary);
    background: var(--bg-base);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--ff-display);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin: 0 0 var(--s-4);
    color: var(--ink-primary);
}
h1 { font-size: var(--fs-5xl); letter-spacing: -0.03em; }
h2 { font-size: var(--fs-4xl); }
h3 { font-size: var(--fs-2xl); }
h4 { font-size: var(--fs-xl); }
h5 { font-size: var(--fs-lg); }
h6 { font-size: var(--fs-md); text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-secondary); }

p { margin: 0 0 var(--s-4); color: var(--ink-primary); }
p:last-child { margin-bottom: 0; }

a { color: var(--accent-primary); text-decoration: none; transition: color 120ms ease; }
a:hover { color: var(--accent-hover); }

.eyebrow {
    font-family: var(--ff-mono);
    font-size: var(--fs-sm);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent-primary);
    margin: 0 0 var(--s-3);
    display: inline-block;
}

.lede { font-size: var(--fs-lg); color: var(--ink-secondary); max-width: 60ch; }

/* Container + layout */
.container { max-width: var(--container-wide); margin: 0 auto; padding: 0 var(--s-5); }
.container--read { max-width: var(--container-read); }
section { padding: var(--s-9) 0; }
section.section--compact { padding: var(--s-7) 0; }
section.section--inverse { background: var(--bg-inverse); color: var(--ink-on-dark); }
section.section--inverse h1, section.section--inverse h2, section.section--inverse h3, section.section--inverse h4 { color: var(--ink-on-dark); }
section.section--inverse p { color: var(--ink-on-dark); opacity: 0.85; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--s-2);
    padding: var(--s-3) var(--s-6);
    font-family: var(--ff-body);
    font-size: var(--fs-base);
    font-weight: 500;
    border-radius: var(--radius-pill);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 160ms ease;
    text-decoration: none;
}
.btn-primary {
    background: var(--accent-primary);
    color: #FFFFFF;
}
.btn-primary:hover {
    background: var(--accent-hover);
    color: #FFFFFF;
    box-shadow: 0 4px 20px var(--accent-glow);
    transform: translateY(-1px);
}
.btn-secondary {
    background: transparent;
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}
.btn-secondary:hover { background: var(--accent-primary); color: #FFFFFF; }
.btn-ghost {
    background: transparent;
    color: var(--ink-primary);
    border-color: var(--border-strong);
}
.btn-ghost:hover { border-color: var(--ink-primary); }

/* Cards */
.paper-card {
    background: var(--bg-card);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-lg);
    padding: var(--s-6);
    box-shadow: var(--shadow-card);
    transition: box-shadow 200ms ease, transform 200ms ease;
}
.paper-card:hover { box-shadow: var(--shadow-card-lg); }
.paper-card--link:hover { transform: translateY(-2px); }
.paper-card h3 { font-size: var(--fs-xl); margin-bottom: var(--s-3); }

/* Status badge */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    padding: var(--s-1) var(--s-3);
    font-family: var(--ff-mono);
    font-size: var(--fs-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-radius: var(--radius-pill);
    border: 1px solid currentColor;
    background: transparent;
    line-height: 1.4;
}
.status-badge--live    { color: var(--status-live);    background: rgba(0, 182, 122, 0.08); border-color: var(--status-live); }
.status-badge--beta    { color: var(--status-beta);    background: rgba(14, 132, 165, 0.08); }
.status-badge--roadmap { color: var(--ink-secondary);  border-color: var(--border-strong); }
.status-badge--labs    { color: var(--status-labs);    background: rgba(196, 154, 74, 0.08); }

/* Grid helpers */
.grid { display: grid; gap: var(--s-5); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(247, 245, 238, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-hairline);
    transition: padding 160ms ease;
}
.header-inner {
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: var(--s-4) var(--s-5);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s-5);
}
.header-logo { display: flex; align-items: center; font-family: var(--ff-display); font-weight: 700; font-size: var(--fs-xl); color: var(--ink-primary); letter-spacing: -0.02em; }
.header-logo span { display: inline-block; width: 10px; height: 10px; border-radius: var(--radius-sm); background: var(--accent-primary); margin-right: var(--s-2); transform: rotate(45deg); }

.header-nav { flex: 1; }
.nav-menu { list-style: none; margin: 0; padding: 0; display: flex; gap: var(--s-5); justify-content: center; }
.nav-item { position: relative; }
.nav-link { color: var(--ink-primary); font-size: var(--fs-base); font-weight: 500; padding: var(--s-2) 0; background: none; border: 0; cursor: pointer; display: inline-flex; align-items: center; gap: var(--s-2); font-family: var(--ff-body); }
.nav-link:hover { color: var(--accent-primary); }
.nav-chevron { transition: transform 160ms ease; }
.nav-item--dropdown[aria-expanded="true"] .nav-chevron { transform: rotate(180deg); }

.nav-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(-6px);
    min-width: 320px;
    background: var(--bg-card);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card-lg);
    padding: var(--s-3);
    opacity: 0;
    visibility: hidden;
    transition: all 160ms ease;
}
.nav-item--dropdown:hover > .nav-dropdown,
.nav-item--dropdown.is-open > .nav-dropdown { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.nav-dropdown__list { list-style: none; margin: 0; padding: 0; }
.nav-dropdown__list li a { display: block; padding: var(--s-3) var(--s-4); border-radius: var(--radius-md); color: var(--ink-primary); font-size: var(--fs-base); }
.nav-dropdown__list li a:hover { background: var(--bg-card-alt); color: var(--accent-primary); }
.nav-dropdown__seeall a { color: var(--accent-primary); font-weight: 500; border-top: 1px solid var(--border-hairline); margin-top: var(--s-2); padding-top: var(--s-3); }

.header-cta { flex-shrink: 0; }

/* Hamburger */
.nav-toggle { display: none; background: none; border: 0; padding: var(--s-2); cursor: pointer; width: 40px; height: 40px; flex-direction: column; justify-content: center; gap: 4px; }
.nav-toggle__bar { display: block; width: 22px; height: 2px; background: var(--ink-primary); }

.mobile-menu { display: none; }

@media (max-width: 900px) {
    .header-nav, .header-cta { display: none; }
    .nav-toggle { display: flex; }

    .mobile-overlay { display: block; position: fixed; inset: 0; background: rgba(28, 29, 34, 0.4); opacity: 0; visibility: hidden; transition: all 200ms ease; z-index: 98; }
    .mobile-overlay[aria-hidden="false"] { opacity: 1; visibility: visible; }
    .mobile-menu { display: block; position: fixed; top: 0; right: 0; bottom: 0; width: min(360px, 85vw); background: var(--bg-base); padding: var(--s-5); transform: translateX(100%); transition: transform 260ms ease; z-index: 99; overflow-y: auto; }
    .mobile-menu[aria-hidden="false"] { transform: translateX(0); }
    .mobile-menu__header { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--s-6); }
    .mobile-menu__close { background: none; border: 0; padding: var(--s-2); cursor: pointer; color: var(--ink-primary); }
    .mobile-menu__nav { display: flex; flex-direction: column; gap: var(--s-3); }
    .mobile-section__toggle { width: 100%; display: flex; justify-content: space-between; align-items: center; background: none; border: 0; padding: var(--s-3) 0; font-family: var(--ff-mono); font-size: var(--fs-sm); text-transform: uppercase; letter-spacing: 0.12em; color: var(--ink-secondary); cursor: pointer; }
    .mobile-section__list { list-style: none; margin: 0; padding: 0; max-height: 0; overflow: hidden; transition: max-height 240ms ease; }
    .mobile-section__toggle[aria-expanded="true"] ~ .mobile-section__list { max-height: 600px; }
    .mobile-section__list li a { display: block; padding: var(--s-3) 0 var(--s-3) var(--s-4); color: var(--ink-primary); border-left: 2px solid var(--border-hairline); }
    .mobile-menu__link { padding: var(--s-4) 0; color: var(--ink-primary); font-weight: 500; border-top: 1px solid var(--border-hairline); }
    .mobile-menu__cta { margin-top: var(--s-5); }
}

/* Footer */
.site-footer { background: var(--bg-inverse); color: var(--ink-on-dark); padding: var(--s-9) 0 var(--s-6); }
.site-footer a { color: var(--ink-on-dark); opacity: 0.75; }
.site-footer a:hover { opacity: 1; color: #FFFFFF; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: var(--s-6); }
.footer-col h6 { color: var(--ink-on-dark); opacity: 0.6; margin-bottom: var(--s-4); }
.footer-col h6 a { color: inherit; text-decoration: none; transition: opacity 120ms ease, color 120ms ease; }
.footer-col h6 a:hover { color: var(--accent-primary); opacity: 1; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: var(--s-3); }
.footer-col__seeall { opacity: 0.6; }
.footer-col__seeall a { color: var(--ink-on-dark); }
.footer-col__seeall a:hover { color: var(--accent-primary); }
.footer-bottom { margin-top: var(--s-8); padding-top: var(--s-5); border-top: 1px solid rgba(255,255,255,0.1); display: flex; justify-content: space-between; align-items: center; font-size: var(--fs-sm); opacity: 0.6; }

/* Hero (front page) */
.hero { padding: var(--s-10) 0 var(--s-9); position: relative; overflow: hidden; }
.hero__content { max-width: 860px; }
.hero h1 { margin-bottom: var(--s-5); }
.hero .lede { font-size: var(--fs-xl); margin-bottom: var(--s-6); }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--s-3); }
.hero__qualifier { margin-top: var(--s-6); color: var(--ink-muted); font-size: var(--fs-sm); font-family: var(--ff-mono); }
.hero__canvas { position: absolute; inset: 0; z-index: -1; opacity: 0.4; pointer-events: none; }

/* Sections — common */
.section-header { max-width: 860px; margin: 0 auto var(--s-7); text-align: center; }
.section-header .eyebrow { display: inline-block; }
.section-header h2 { margin-bottom: var(--s-4); }
.section-header .lede { margin: 0 auto; }

/* Catalogue card (used on homepage + archives) */
.catalogue-card {
    background: var(--bg-card);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-lg);
    padding: var(--s-5);
    display: flex;
    flex-direction: column;
    gap: var(--s-3);
    transition: all 200ms ease;
    height: 100%;
    color: inherit;
    text-decoration: none;
}
.catalogue-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-card-lg); border-color: var(--border-strong); color: inherit; }
.catalogue-card__topline { display: flex; justify-content: space-between; align-items: center; gap: var(--s-3); }
.catalogue-card__header { display: flex; justify-content: space-between; align-items: flex-start; gap: var(--s-3); }
.catalogue-card h3 { font-size: var(--fs-lg); margin: 0; }
.catalogue-card__excerpt { color: var(--ink-secondary); font-size: var(--fs-base); flex: 1; }
.catalogue-card__meta { display: flex; gap: var(--s-2); flex-wrap: wrap; font-size: var(--fs-xs); color: var(--ink-muted); text-transform: uppercase; letter-spacing: 0.08em; font-family: var(--ff-mono); }
.catalogue-card__type {
    display: inline-block;
    font-size: var(--fs-xs);
    font-family: var(--ff-mono);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    background: var(--bg-card-alt);
    color: var(--ink-secondary);
    border: 1px solid var(--border-hairline);
}
.catalogue-card__type--agent       { color: var(--accent-primary); border-color: rgba(14, 132, 165, 0.25); background: rgba(14, 132, 165, 0.06); }
.catalogue-card__type--use_case    { color: #8a5a00; border-color: rgba(196, 154, 74, 0.35); background: rgba(196, 154, 74, 0.10); }
.catalogue-card__type--integration { color: #5b3aa1; border-color: rgba(91, 58, 161, 0.30); background: rgba(91, 58, 161, 0.08); }
.catalogue-card__type--regulation  { color: #2f6b3a; border-color: rgba(0, 182, 122, 0.35); background: rgba(0, 182, 122, 0.10); }
.catalogue-card__type--resource    { color: #b85a3d; border-color: rgba(184, 90, 61, 0.30); background: rgba(184, 90, 61, 0.08); }

/* Taxonomy archive + hub: filter chip row */
.taxonomy-chips {
    border-top: 1px solid var(--border-hairline);
    border-bottom: 1px solid var(--border-hairline);
    background: var(--bg-card);
    padding: var(--s-4) 0;
    margin-bottom: var(--s-6);
}
.taxonomy-chips > .container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-2);
    align-items: center;
}
.filter-chip {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    font-size: var(--fs-sm);
    font-family: var(--ff-base);
    padding: var(--s-2) var(--s-4);
    border-radius: 999px;
    background: var(--bg-base);
    color: var(--ink-secondary);
    border: 1px solid var(--border-hairline);
    cursor: pointer;
    transition: all 120ms ease;
    text-decoration: none;
    line-height: 1;
}
.filter-chip:hover { color: var(--accent-primary); border-color: var(--accent-primary); }
.filter-chip--active {
    background: var(--accent-primary);
    color: #FFFFFF;
    border-color: var(--accent-primary);
}
.filter-chip--active:hover { color: #FFFFFF; }
.filter-chip__count {
    font-size: var(--fs-xs);
    color: var(--ink-muted);
    font-family: var(--ff-mono);
}
.filter-chip--active .filter-chip__count { color: rgba(255, 255, 255, 0.85); }
.entry-hero--taxonomy .lede { max-width: 720px; }
.taxonomy-breakdown {
    margin-top: var(--s-4);
    padding: var(--s-3) var(--s-4);
    background: var(--bg-card-alt);
    border-radius: var(--radius-md);
    font-size: var(--fs-sm);
    color: var(--ink-secondary);
    font-family: var(--ff-mono);
    display: inline-block;
    border: 1px solid var(--border-hairline);
}
.taxonomy-breakdown strong { color: var(--ink-primary); font-weight: 600; }

/* Vitruvian grid motif (hero background + accent decoration) */
.vitru-grid-bg {
    background-image:
        linear-gradient(to right, rgba(14, 132, 165, 0.05) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(14, 132, 165, 0.05) 1px, transparent 1px);
    background-size: 40px 40px;
}

/* Proof section */
.proof-logos { display: flex; flex-wrap: wrap; gap: var(--s-6); align-items: center; justify-content: center; opacity: 0.7; }
.proof-logos img { height: 32px; width: auto; filter: grayscale(100%); }

/* FAQ — always-expanded (intentionally non-collapsible per Ian's 2026-04-26 feedback) */
.faq-list { display: flex; flex-direction: column; list-style: none; padding: 0; margin: 0; }
.faq-item { border-top: 1px solid var(--border-hairline); padding: var(--s-4) 0; }
.faq-item:last-child { border-bottom: 1px solid var(--border-hairline); }
.faq-item__q {
    font-weight: 600;
    font-size: var(--fs-md);
    margin: 0;
    line-height: 1.4;
    color: var(--ink-primary);
}
.faq-item__a { margin-top: var(--s-3); color: var(--ink-secondary); }
.faq-item__a p { margin-top: 0; color: var(--ink-secondary); }
.faq-item__a p + p { margin-top: var(--s-3); }
.block-faq .container { max-width: var(--container-read); }

/* body_html (Gutenberg core blocks inside .block-body wrapper) — reuse the
   prose-tuned typography from .entry-body so an h2 inside a body_html group
   doesn't render at hero-headline scale. */
.block-body { padding: var(--s-7) 0; }
.block-body .container--read h2 { font-size: var(--fs-2xl); margin-top: var(--s-7); margin-bottom: var(--s-4); letter-spacing: -0.01em; }
.block-body .container--read h3 { font-size: var(--fs-xl); margin-top: var(--s-6); margin-bottom: var(--s-3); }
.block-body .container--read h4 { font-size: var(--fs-lg); margin-top: var(--s-5); margin-bottom: var(--s-3); }
.block-body .container--read p, .block-body .container--read ul, .block-body .container--read ol { font-size: var(--fs-md); line-height: 1.75; }
.block-body .container--read ul, .block-body .container--read ol { padding-left: var(--s-5); margin: var(--s-3) 0; }
.block-body .container--read li { margin-bottom: var(--s-2); }
.block-body .container--read li > strong:first-child { color: var(--ink-primary); }

/* Booking block */
.booking { text-align: center; max-width: 720px; margin: 0 auto; }

/* Role grid */
.role-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--s-5); }
.role-card h4 { color: var(--accent-primary); margin-bottom: var(--s-3); font-size: var(--fs-lg); }

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 700ms cubic-bezier(0.22, 1, 0.36, 1), transform 700ms cubic-bezier(0.22, 1, 0.36, 1); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* Utility */
.visually-hidden { position: absolute !important; clip: rect(1px, 1px, 1px, 1px); height: 1px; width: 1px; overflow: hidden; white-space: nowrap; }