/* Shared styles for the chiaha.com section pages (services, tools, customers,
   research, about). Tokens, nav and buttons match the inline styles on
   index.html and manufacturing-simulation.html so the pages read as one site.
   Footer rules live in chrome.css, which every page links. */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #ffffff; --surface: #eef3f7; --border: rgba(0,0,0,0.08);
  --text: #0f172a; --muted: rgba(15,23,42,0.65);
  --accent: #0f2a3d; --accent-lt: #5BC0DE; --accent-dk: #1B5E7B;
  --accent2: #2B7A9E; --accent3: #e8542e;
  --card-bg: rgba(0,0,0,0.02);
}
[data-theme="dark"] {
  --bg: #07111e; --surface: #0f172a; --border: rgba(255,255,255,0.07);
  --text: #e2e8f0; --muted: rgba(226,232,240,0.68);
  --card-bg: rgba(255,255,255,0.03);
}
html { scroll-behavior: smooth; overflow-x: clip; }
body { font-family: 'DM Sans', sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; overflow-wrap: break-word; overflow-x: clip; }
img, svg { max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
:target { scroll-margin-top: 110px; }

/* ── Nav ── */
nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; display: flex; align-items: center; justify-content: space-between; padding: 14px 48px; border-bottom: 1px solid var(--border); background: rgba(255,255,255,0.9); backdrop-filter: blur(16px); }
[data-theme="dark"] nav { background: rgba(7,17,30,0.92); }
.nav-brand { display: flex; align-items: center; }
.nav-brand img { height: 72px; }
.nav-links { display: flex; gap: 36px; list-style: none; }
.nav-links a { font-family: 'DM Mono', monospace; font-size: 12px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--muted); transition: color 0.2s; }
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--accent-lt); }
.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-cta { font-family: 'DM Mono', monospace; font-size: 12px; letter-spacing: 1.5px; text-transform: uppercase; color: #fff; background: var(--accent); padding: 12px 20px; border: 1px solid rgba(91,192,222,0.35); border-radius: 4px; font-weight: 500; display: inline-block; }
.nav-cta:hover { opacity: 0.88; }
.nav-mobile-toggle { display: none; background: var(--surface); border: 1px solid var(--border); border-radius: 6px; color: inherit; font-size: 22px; line-height: 1; cursor: pointer; padding: 6px 12px; }

/* ── Buttons ── */
.btn-primary { font-family: 'DM Mono', monospace; font-size: 12px; letter-spacing: 2px; text-transform: uppercase; color: #fff; background: var(--accent); padding: 16px 30px; border: 1px solid rgba(91,192,222,0.35); border-radius: 4px; font-weight: 500; display: inline-block; transition: transform 0.2s, opacity 0.2s; }
.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }
.btn-ghost { font-family: 'DM Mono', monospace; font-size: 12px; letter-spacing: 2px; text-transform: uppercase; color: var(--text); background: transparent; padding: 16px 30px; border: 1px solid var(--border); border-radius: 4px; display: inline-flex; align-items: center; gap: 10px; transition: transform 0.2s, border-color 0.2s; }
.btn-ghost:hover { border-color: var(--accent-lt); transform: translateY(-1px); }

/* ── Page hero (left-aligned, no video: these are reading pages) ── */
.page-hero { padding: 170px 48px 72px; background: var(--surface); border-bottom: 1px solid var(--border); }
.page-hero-inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: 56px; align-items: end; }
.crumbs { font-family: 'DM Mono', monospace; font-size: 12px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--muted); margin-bottom: 22px; }
.crumbs a { color: var(--accent-lt); }
.crumbs span { margin: 0 8px; opacity: 0.6; }
.page-hero h1 { font-family: 'Playfair Display', serif; font-size: clamp(38px, 5vw, 64px); font-weight: 900; line-height: 1.06; letter-spacing: -1.5px; }
.page-hero h1 em { font-style: italic; color: var(--accent-lt); }
.page-hero .lede { font-size: 18px; font-weight: 300; color: var(--muted); line-height: 1.7; }
.page-hero .lede a { color: var(--accent-lt); text-decoration: underline; text-underline-offset: 3px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 28px; }
.jump { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.jump a { font-family: 'DM Mono', monospace; font-size: 12px; letter-spacing: 1px; text-transform: uppercase; color: var(--muted); border: 1px solid var(--border); border-radius: 999px; padding: 8px 14px; background: var(--card-bg); }
.jump a:hover { color: var(--text); border-color: var(--accent-lt); }

/* ── Sections ── */
.section { padding: 96px 48px; }
.section.alt { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-inner { max-width: 1200px; margin: 0 auto; }
.section-head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; align-items: end; margin-bottom: 48px; }
.section-head.single { grid-template-columns: 1fr; }
.eyebrow { font-family: 'DM Mono', monospace; font-size: 12px; letter-spacing: 3px; text-transform: uppercase; color: var(--accent-lt); margin-bottom: 12px; }
.section-title { font-family: 'Playfair Display', serif; font-size: clamp(30px, 3.8vw, 44px); font-weight: 700; line-height: 1.12; letter-spacing: -1px; }
.section-title em { font-style: italic; color: var(--accent-lt); }
.section-head p, .body-copy p { font-size: 16px; color: var(--muted); line-height: 1.75; }
.body-copy p + p { margin-top: 16px; }
.section-head p a, .body-copy p a, .note a { color: var(--accent-lt); text-decoration: underline; text-underline-offset: 2px; }
.body-copy strong { color: var(--text); font-weight: 500; }
.note { font-size: 15px; color: var(--muted); line-height: 1.7; margin-top: 28px; }
.split { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); gap: 56px; align-items: start; }

/* ── Link cards (services hub, case studies) ── */
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.card-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card { background: var(--card-bg); border: 1px solid var(--border); border-top: 3px solid var(--accent-lt); border-radius: 4px; padding: 28px 26px; display: flex; flex-direction: column; gap: 10px; transition: background 0.2s, border-color 0.2s; }
.card:nth-child(3n+2) { border-top-color: var(--accent3); }
.card:nth-child(3n) { border-top-color: var(--accent2); }
a.card:hover { background: rgba(91,192,222,0.07); }
.card .kicker { font-family: 'DM Mono', monospace; font-size: 11px; letter-spacing: 2px; text-transform: uppercase; color: var(--accent-lt); }
.card h3 { font-family: 'Playfair Display', serif; font-size: 22px; font-weight: 700; letter-spacing: -0.3px; line-height: 1.25; }
.card p { font-size: 15px; font-weight: 300; color: var(--muted); line-height: 1.65; }
.card .go { font-family: 'DM Mono', monospace; font-size: 12px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--accent-lt); margin-top: auto; padding-top: 8px; }
.card.plain { border-top-width: 1px; border-top-color: var(--border); }

/* ── Numbered list (how we work) ── */
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.step { padding: 26px; background: var(--card-bg); border: 1px solid var(--border); border-radius: 4px; }
.step-num { width: 36px; height: 36px; border-radius: 50%; background: rgba(91,192,222,0.1); border: 1px solid rgba(91,192,222,0.3); display: flex; align-items: center; justify-content: center; font-family: 'DM Mono', monospace; font-size: 14px; color: var(--accent-lt); margin-bottom: 16px; }
.step h3 { font-family: 'Playfair Display', serif; font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.step p { font-size: 15px; color: var(--muted); line-height: 1.65; }

/* ── Quotes ── */
.quote-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.quote-card { margin: 0; background: var(--card-bg); border: 1px solid var(--border); border-left: 3px solid var(--accent-lt); border-radius: 4px; padding: 28px 30px; display: flex; flex-direction: column; }
.quote-card blockquote { font-family: 'Playfair Display', serif; font-size: 19px; font-style: italic; line-height: 1.55; color: var(--text); flex: 1; }
.quote-card blockquote strong { color: var(--accent-lt); font-style: normal; }
.quote-card figcaption { margin-top: 18px; font-family: 'DM Mono', monospace; font-size: 12px; letter-spacing: 1px; text-transform: uppercase; color: var(--muted); line-height: 1.6; }
.quote-card figcaption b { color: var(--accent-lt); font-weight: 500; }

/* ── Customer logo wall (static grid of the marquee's mask logos) ── */
.logo-wall { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; --cols: 6; }
.logo-cell { flex: 0 0 calc((100% - (var(--cols) - 1) * 12px) / var(--cols)); display: flex; align-items: center; justify-content: center; min-height: 104px; padding: 18px; background: var(--card-bg); border: 1px solid var(--border); border-radius: 4px; min-width: 0; }
.lm-logo { display: block; flex-shrink: 1; min-width: 0; background-color: var(--accent); opacity: 0.72; width: calc(var(--w) * 1px); height: calc(var(--h) * 1px); max-width: 100%; -webkit-mask: var(--src) center / contain no-repeat; mask: var(--src) center / contain no-repeat; }
[data-theme="dark"] .lm-logo { background-color: #ffffff; }

/* ── Publications ── */
.pub-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.pub { display: flex; gap: 14px; align-items: flex-start; padding: 16px 18px; background: var(--card-bg); border: 1px solid var(--border); border-radius: 6px; transition: border-color 0.2s; }
a.pub:hover { border-color: var(--accent-lt); }
.pub-year { font-family: 'DM Mono', monospace; font-size: 13px; color: var(--accent-lt); flex-shrink: 0; width: 40px; }
.pub-title { font-size: 15px; line-height: 1.4; color: var(--text); }
.pub-meta { display: block; margin-top: 5px; font-size: 14px; color: var(--muted); line-height: 1.5; }
.sub-head { font-family: 'Playfair Display', serif; font-size: 26px; font-weight: 700; margin: 64px 0 10px; }
.sub-head:first-child { margin-top: 0; }
.sub-lede { font-size: 15px; color: var(--muted); line-height: 1.7; margin-bottom: 24px; max-width: 72ch; }
.books { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 20px; }
.book { text-align: center; }
.book img { width: 100%; border-radius: 6px; border: 1px solid var(--border); margin-bottom: 10px; display: block; }
.book-title { font-size: 14px; font-weight: 600; line-height: 1.3; }
.book-author { font-size: 13px; color: var(--muted); margin-top: 3px; }

/* ── People ── */
.people { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; margin-bottom: 20px; }
.people.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.person { background: var(--card-bg); border: 1px solid var(--border); border-left: 3px solid var(--accent-lt); border-radius: 4px; padding: 28px 30px; }
.person .role { font-family: 'DM Mono', monospace; font-size: 12px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--accent-lt); line-height: 1.5; margin-bottom: 8px; }
.person h3 { font-family: 'Playfair Display', serif; font-size: 24px; font-weight: 700; letter-spacing: -0.4px; margin-bottom: 10px; }
.person p { font-size: 15px; font-weight: 300; color: var(--muted); line-height: 1.7; }
.person p a { color: var(--accent-lt); text-decoration: underline; text-underline-offset: 2px; }
.facts { list-style: none; border-top: 1px solid var(--border); }
.facts li { display: flex; justify-content: space-between; gap: 20px; padding: 16px 0; border-bottom: 1px solid var(--border); font-size: 15px; color: var(--muted); }
.facts li b { font-family: 'Playfair Display', serif; font-size: 24px; color: var(--text); font-weight: 700; white-space: nowrap; }
.press { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }

/* ── Tools grid (same cards as the homepage) ── */
.tools-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2px; }
.tool-card { background: var(--card-bg); border: 1px solid var(--border); border-left: 3px solid var(--tool-color, var(--accent)); padding: 36px; display: flex; flex-direction: column; border-radius: 2px; transition: background 0.3s, box-shadow 0.3s; }
.tool-card img { display: block; align-self: flex-start; object-fit: contain; }
.tool-card:hover { background: rgba(91,192,222,0.1); box-shadow: 0 6px 28px rgba(91,192,222,0.18); }
.tool-badge { font-family: 'DM Mono', monospace; font-size: 11px; font-weight: 500; letter-spacing: 1.5px; text-transform: uppercase; padding: 4px 10px; background: rgba(43,122,158,0.08); color: var(--accent-lt); border: 1px solid rgba(43,122,158,0.2); align-self: flex-start; margin-bottom: 20px; border-radius: 2px; }
.tool-badge.sandbox-free { background: rgba(245,158,11,0.10); color: #f59e0b; border-color: rgba(245,158,11,0.30); }
.tool-badge.sandbox-agent { background: rgba(91,192,222,0.10); color: var(--accent-lt); border-color: rgba(91,192,222,0.30); }
.tool-tagline { font-family: 'DM Mono', monospace; font-size: 12px; letter-spacing: 2px; text-transform: uppercase; color: var(--muted); margin-bottom: 14px; }
.tool-desc { font-size: 15px; font-weight: 300; color: var(--muted); line-height: 1.65; }
.tool-cta { font-family: 'DM Mono', monospace; font-size: 12px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--tool-color, var(--accent-lt)); margin-top: auto; padding-top: 18px; font-weight: 600; }
.mcp-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.mcp-card { padding: 22px 24px; border: 1px solid var(--border); border-radius: 8px; background: var(--card-bg); }
.mcp-id { font-family: 'DM Mono', monospace; font-size: 12px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--accent-lt); margin-bottom: 10px; }
.mcp-name { font-family: 'Playfair Display', serif; font-size: 19px; font-weight: 700; margin-bottom: 6px; }
.mcp-desc { font-size: 14px; color: var(--muted); margin-bottom: 14px; line-height: 1.55; }
.mcp-card code { display: block; font-size: 13px; padding: 8px 10px; background: var(--bg); border: 1px solid var(--border); border-radius: 4px; color: var(--accent-lt); overflow-x: auto; }

/* ── CTA ── */
.cta-section { padding: 110px 48px; background: var(--surface); border-top: 1px solid var(--border); }
.cta-inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 56px; align-items: center; }
.cta-headline { font-family: 'Playfair Display', serif; font-size: clamp(32px, 4.4vw, 54px); font-weight: 900; letter-spacing: -1.2px; line-height: 1.08; }
.cta-headline em { font-style: italic; color: var(--accent-lt); }
.cta-sub { font-size: 16px; color: var(--muted); line-height: 1.7; margin-bottom: 26px; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ── Responsive ── */
@media (max-width: 1100px) {
  .books { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .logo-wall { --cols: 4; }
}
@media (max-width: 1000px) {
  .card-grid, .quote-grid, .tools-grid, .mcp-grid, .steps, .people.three, .press { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-hero-inner, .section-head, .split, .cta-inner { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 900px) {
  nav { padding: 12px 24px; }
  .nav-brand img { height: 48px; }
  .nav-right { display: none; }
  .nav-mobile-toggle { display: block; margin-left: auto; }
  .nav-links { display: none; }
  .nav-links.mobile-open { display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: #07111e; padding: 16px 24px 22px; box-shadow: 0 12px 24px rgba(0,0,0,0.4); gap: 14px; border-bottom: 1px solid var(--border); }
  .nav-links.mobile-open a { font-size: 14px; }
}
@media (max-width: 700px) {
  .section, .cta-section { padding: 72px 20px; }
  .page-hero { padding: 120px 20px 56px; }
  .card-grid, .card-grid.two, .quote-grid, .tools-grid, .mcp-grid, .steps, .people, .people.three, .press, .pub-grid { grid-template-columns: 1fr; }
  .logo-wall { --cols: 2; }
  .books { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tool-card { padding: 28px 24px; }
  .page-hero .lede { font-size: 17px; }
}