/* =========================================================
   Leomedo Inc — Renaissance manuscript theme
   Palette: parchment / deep ink / Renaissance gold
   ========================================================= */

:root {
  --parchment: #f5edd8;
  --parchment-2: #ede2c8;
  --parchment-3: #e6d9b8;
  --ink: #1a2235;
  --ink-2: #3a4257;
  --ink-soft: #5a6275;
  --gold: #c9a24b;
  --gold-deep: #a8842f;
  --rust: #a65a3c;
  --serif: "Cormorant Garamond", "Noto Serif SC", Georgia, serif;
  --sans: "Inter", "Noto Sans SC", system-ui, sans-serif;
  --maxw: 1120px;
}

/* ---------- Reset ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--parchment);
  line-height: 1.65;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img, svg { display: block; max-width: 100%; }

/* ---------- Paper texture ---------- */
.paper-texture {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(120% 80% at 50% 0%, rgba(255,250,235,0.6), transparent 60%),
    radial-gradient(100% 100% at 100% 100%, rgba(166,90,60,0.06), transparent 55%),
    radial-gradient(100% 100% at 0% 100%, rgba(201,162,75,0.07), transparent 55%);
}
.grid-overlay {
  position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: 0.5;
  background-image:
    linear-gradient(rgba(26,34,53,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26,34,53,0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(120% 100% at 50% 30%, #000 40%, transparent 90%);
}

/* ---------- Layout helpers ---------- */
.section, .hero, .cta, .nav, .footer { position: relative; z-index: 1; }
.section { padding: 7rem 1.5rem; }
.section--alt { background: linear-gradient(180deg, transparent, rgba(237,226,200,0.55) 20%, rgba(237,226,200,0.55) 80%, transparent); }
.section__body { max-width: var(--maxw); margin: 0 auto; }
.two-col { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 4rem; align-items: center; }
.section__head { max-width: var(--maxw); margin: 0 auto 3rem; display: flex; align-items: center; gap: 1.25rem; }
.section__num {
  font-family: var(--serif); font-size: 1.6rem; font-style: italic;
  color: var(--gold-deep); letter-spacing: 0.04em;
}
.section__rule { flex: 1; height: 1px; background: linear-gradient(90deg, var(--gold), transparent); }
.section__title-center { font-family: var(--serif); font-weight: 600; font-size: clamp(2rem, 4vw, 3rem); text-align: center; letter-spacing: 0.01em; }
.section__lead { max-width: 720px; margin: 1.5rem auto 3rem; text-align: center; font-size: 1.15rem; color: var(--ink-2); }
.section__motto { text-align: center; margin-top: 3rem; font-family: var(--serif); font-style: italic; font-size: 1.5rem; color: var(--gold-deep); }
.section__note { text-align: center; margin-top: 2rem; font-size: 0.9rem; color: var(--ink-soft); font-style: italic; }

/* ---------- Headings / prose ---------- */
h2 { font-family: var(--serif); font-weight: 600; line-height: 1.15; letter-spacing: 0.01em; }
.prose h2 { font-size: clamp(1.9rem, 3.5vw, 2.8rem); margin-bottom: 1.5rem; }
.prose p { margin-bottom: 1.2rem; color: var(--ink-2); font-size: 1.08rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; padding: 0.8rem 1.6rem; border-radius: 2px;
  font-family: var(--sans); font-weight: 500; font-size: 0.95rem;
  letter-spacing: 0.03em; cursor: pointer; transition: all 0.25s ease;
  border: 1px solid transparent;
}
.btn--gold { background: var(--gold); color: #fff; border-color: var(--gold); }
.btn--gold:hover { background: var(--gold-deep); border-color: var(--gold-deep); transform: translateY(-1px); }
.btn--ink { background: var(--ink); color: var(--parchment); }
.btn--ink:hover { background: var(--ink-2); transform: translateY(-1px); }
.btn--ghost { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn--ghost:hover { background: var(--ink); color: var(--parchment); }
.btn--lg { padding: 1.1rem 2.4rem; font-size: 1.05rem; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.1rem 2rem;
  background: rgba(245,237,216,0.82);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(26,34,53,0.08);
}
.nav__brand { display: flex; align-items: center; gap: 0.6rem; color: var(--ink); }
.nav__mark { width: 30px; height: 30px; color: var(--gold-deep); }
.nav__name { font-family: var(--serif); font-size: 1.4rem; font-weight: 600; letter-spacing: 0.02em; }
.nav__name em { font-style: italic; color: var(--gold-deep); font-weight: 500; }
.nav__links { display: flex; gap: 1.8rem; }
.nav__links a { font-size: 0.92rem; color: var(--ink-2); letter-spacing: 0.04em; position: relative; transition: color 0.2s; }
.nav__links a::after { content: ""; position: absolute; left: 0; bottom: -4px; width: 0; height: 1px; background: var(--gold); transition: width 0.25s; }
.nav__links a:hover { color: var(--ink); }
.nav__links a:hover::after { width: 100%; }
.nav__actions { display: flex; align-items: center; gap: 1rem; }
.lang-toggle {
  background: none; border: 1px solid rgba(26,34,53,0.25); border-radius: 2px;
  padding: 0.35rem 0.6rem; font-family: var(--sans); font-size: 0.8rem; cursor: pointer;
  color: var(--ink-soft); letter-spacing: 0.05em; transition: all 0.2s;
}
.lang-toggle:hover { border-color: var(--gold); color: var(--ink); }
.lang-toggle .is-active { color: var(--ink); font-weight: 600; }
.lang-sep { margin: 0 0.15rem; opacity: 0.4; }
.nav__cta { padding: 0.5rem 1.1rem; font-size: 0.85rem; }

/* ---------- Hero ---------- */
.hero { min-height: 92vh; display: flex; flex-direction: column; justify-content: center; padding: 4rem 2rem 2rem; }
.hero__inner { max-width: var(--maxw); margin: 0 auto; display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 3rem; align-items: center; }
.hero__figure { display: flex; justify-content: center; }
.vitruvian { width: 100%; max-width: 380px; }
.hero__eyebrow { font-family: var(--serif); font-style: italic; font-size: 1.1rem; color: var(--gold-deep); letter-spacing: 0.08em; margin-bottom: 1rem; }
.hero__title { font-family: var(--serif); font-weight: 600; font-size: clamp(2.6rem, 6vw, 4.6rem); line-height: 1.02; letter-spacing: -0.01em; }
.hero__title span { display: block; }
.hero__title-accent { font-style: italic; color: var(--gold-deep); }
.hero__sub { margin-top: 1.6rem; max-width: 540px; font-size: 1.18rem; color: var(--ink-2); }
.hero__ctas { margin-top: 2.2rem; display: flex; gap: 1rem; flex-wrap: wrap; }
.hero__mirror { margin-top: 2.8rem; font-family: var(--serif); font-style: italic; font-size: 1.2rem; color: var(--ink-soft); transform: scaleX(-1); display: inline-block; }
.hero__mirror-note { font-size: 0.8rem; color: var(--ink-soft); margin-top: 0.3rem; opacity: 0.7; }
.hero__scroll { position: absolute; bottom: 1.5rem; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 0.4rem; font-size: 0.75rem; letter-spacing: 0.15em; color: var(--ink-soft); text-transform: uppercase; }
.hero__scroll svg { width: 12px; height: 24px; color: var(--gold-deep); animation: nudge 2s ease-in-out infinite; }
@keyframes nudge { 0%,100% { transform: translateY(0); } 50% { transform: translateY(4px); } }

/* Vitruvian draw animation */
.vitruvian circle, .vitruvian path { stroke-linecap: round; }
.draw-1, .draw-2, .draw-3, .draw-4, .draw-5, .draw-6 {
  stroke-dasharray: 1200; stroke-dashoffset: 1200;
  animation: draw 2.4s ease forwards;
}
.draw-1 { animation-delay: 0.1s; } .draw-2 { animation-delay: 0.3s; }
.draw-3 { animation-delay: 0.6s; } .draw-4 { animation-delay: 1.0s; }
.draw-5 { animation-delay: 1.4s; } .draw-6 { animation-delay: 1.8s; }
@keyframes draw { to { stroke-dashoffset: 0; } }
.halo { transform-origin: center; animation: spin 40s linear infinite; }
.halo--2 { animation: spin 60s linear infinite reverse; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Quote card ---------- */
.quote-card { background: rgba(255,250,238,0.6); border: 1px solid rgba(201,162,75,0.3); border-radius: 3px; padding: 2.2rem; position: relative; }
.quote-card__sketch { width: 100%; max-width: 220px; margin: 0 auto 1.2rem; }
.quote-card blockquote { font-family: var(--serif); font-style: italic; font-size: 1.5rem; line-height: 1.4; color: var(--ink); }
.quote-card cite { display: block; margin-top: 1rem; font-size: 0.9rem; color: var(--gold-deep); font-style: normal; letter-spacing: 0.04em; }

/* ---------- Fusion diagram ---------- */
.fusion { display: grid; grid-template-columns: 1fr auto 1fr; gap: 2rem; align-items: center; margin-top: 1rem; }
.fusion__col { text-align: center; }
.fusion__label { display: block; font-family: var(--serif); font-style: italic; font-size: 1.4rem; color: var(--gold-deep); margin-bottom: 1.2rem; }
.fusion__col ul { display: inline-flex; flex-direction: column; gap: 0.7rem; text-align: left; }
.fusion__col li { padding-left: 1.4rem; position: relative; color: var(--ink-2); }
.fusion__col li::before { content: "✦"; position: absolute; left: 0; color: var(--gold); font-size: 0.7rem; top: 0.35rem; }
.fusion__center { position: relative; }
.fusion__center svg { width: 120px; height: 120px; }
.fusion__plus { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-family: var(--serif); font-size: 2rem; color: var(--gold-deep); opacity: 0; animation: pulse 3s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: 0; } 50% { opacity: 0.6; } }

/* ---------- Cards ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-top: 1rem; }
.card { background: rgba(255,250,238,0.5); border: 1px solid rgba(26,34,53,0.1); border-top: 2px solid var(--gold); border-radius: 3px; padding: 2rem 1.8rem; transition: transform 0.3s, box-shadow 0.3s; }
.card:hover { transform: translateY(-4px); box-shadow: 0 12px 30px -18px rgba(26,34,53,0.4); }
.card__icon { width: 48px; height: 48px; margin-bottom: 1rem; }
.card h3 { font-family: var(--serif); font-size: 1.5rem; font-weight: 600; margin-bottom: 0.7rem; }
.card p { color: var(--ink-2); font-size: 1rem; }

/* ---------- Pillars ---------- */
.pillars { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-top: 1rem; }
.pillar { text-align: center; padding: 1.4rem 1rem; border: 1px dashed rgba(201,162,75,0.5); border-radius: 3px; font-family: var(--serif); font-size: 1.1rem; color: var(--ink); background: rgba(255,250,238,0.4); }

/* ---------- Stats ---------- */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; margin: 2rem 0; }
.stat { text-align: center; padding: 2rem 1rem; }
.stat__num { display: block; font-family: var(--serif); font-size: 1.8rem; font-weight: 600; color: var(--gold-deep); }
.stat__label { display: block; margin-top: 0.5rem; font-size: 0.95rem; color: var(--ink-2); }
.opportunity__close { max-width: 680px; margin: 2rem auto 0; text-align: center; font-size: 1.15rem; color: var(--ink-2); font-style: italic; }

/* ---------- About meta ---------- */
.about-meta { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; margin-top: 2.5rem; }
.about-meta div { text-align: center; }
.about-meta strong { display: block; font-family: var(--serif); font-style: italic; color: var(--gold-deep); font-size: 1rem; font-weight: 500; margin-bottom: 0.3rem; }
.about-meta span { color: var(--ink); font-size: 1.05rem; }

/* ---------- CTA ---------- */
.cta { padding: 6rem 1.5rem; text-align: center; background: linear-gradient(180deg, transparent, rgba(201,162,75,0.08)); }
.cta__inner { max-width: 680px; margin: 0 auto; }
.cta h2 { font-size: clamp(2rem, 4.5vw, 3.2rem); font-weight: 600; }
.cta p { margin: 1.2rem 0 2rem; font-size: 1.15rem; color: var(--ink-2); }
.cta__ceo { margin-top: 1.5rem; font-family: var(--serif); font-style: italic; color: var(--gold-deep); }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid rgba(26,34,53,0.12); padding: 3rem 2rem 2rem; background: rgba(237,226,200,0.4); }
.footer__inner { max-width: var(--maxw); margin: 0 auto; display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 1.5rem; }
.footer__name { font-family: var(--serif); font-size: 1.4rem; font-weight: 600; display: block; }
.footer__tag { font-family: var(--serif); font-style: italic; color: var(--ink-soft); font-size: 1rem; }
.footer__contact { display: flex; flex-direction: column; align-items: flex-end; gap: 0.3rem; font-size: 0.95rem; color: var(--ink-2); }
.footer__contact a { color: var(--gold-deep); }
.footer__contact a:hover { text-decoration: underline; }
.footer__legal { max-width: var(--maxw); margin: 2rem auto 0; padding-top: 1.5rem; border-top: 1px solid rgba(26,34,53,0.1); font-size: 0.8rem; color: var(--ink-soft); }
.footer__legal p { margin-bottom: 0.4rem; }
.footer__copy { opacity: 0.8; }

/* ---------- Language: when zh active, hide serif chinese defaults are fine ---------- */
html[lang="zh"] body { font-family: "Noto Sans SC", var(--sans); }
html[lang="zh"] .prose p, html[lang="zh"] .section__lead, html[lang="zh"] .hero__sub, html[lang="zh"] .card p { font-weight: 400; }
html[lang="zh"] h2, html[lang="zh"] .hero__title, html[lang="zh"] .section__title-center, html[lang="zh"] .card h3 { font-family: "Noto Serif SC", var(--serif); }

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.8s ease, transform 0.8s ease; }
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 880px) {
  .nav__links { display: none; }
  .hero__inner { grid-template-columns: 1fr; gap: 2rem; text-align: center; }
  .hero__figure { order: -1; }
  .hero__sub { margin-left: auto; margin-right: auto; }
  .hero__ctas { justify-content: center; }
  .two-col { grid-template-columns: 1fr; gap: 2.5rem; }
  .cards, .pillars, .stats, .about-meta { grid-template-columns: 1fr; }
  .fusion { grid-template-columns: 1fr; gap: 1.5rem; }
  .fusion__center { order: -1; }
  .fusion__col ul { text-align: center; }
  .fusion__col li { padding-left: 0; }
  .fusion__col li::before { display: none; }
  .section { padding: 4.5rem 1.25rem; }
  .footer__contact { align-items: flex-start; }
}
@media (max-width: 520px) {
  .nav { padding: 0.9rem 1rem; }
  .nav__actions { gap: 0.6rem; }
  .nav__cta { display: none; }
}