/* ============================================================
   QHSW — Boutique China Advisory Firm
   Design: editorial · institutional · quiet luxury
   Palette: warm paper, ink, single oxblood accent
   ============================================================ */

:root {
  --paper:      #FAF8F4;
  --paper-2:    #F2EFE9;
  --ink:        #16161A;
  --ink-soft:   #4C4C55;
  --ink-faint:  #8A867C;
  --line:       #E3DED4;
  --line-2:     #D6D0C4;
  --accent:     #7C2D2D;   /* deep oxblood — restrained, not flag-red */
  --accent-deep:#5C1F1F;
  --accent-wash:#F4ECEA;

  --serif: "Fraunces", "Newsreader", Georgia, "Times New Roman", serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;

  --maxw: 1160px;
  --textw: 720px;
  --pad: 24px;
  --nav-h: 72px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  font-size: 17px;
  line-height: 1.72;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 500; color: var(--ink); margin: 0; line-height: 1.12; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.5rem, 5.6vw, 4.4rem); font-weight: 460; }
h2 { font-size: clamp(1.85rem, 3.4vw, 2.8rem); }
h3 { font-size: clamp(1.25rem, 1.8vw, 1.5rem); font-weight: 520; }
h4 { font-size: 1.1rem; font-family: var(--sans); font-weight: 600; letter-spacing: -0.005em; }
p { margin: 0 0 1.1em; color: var(--ink-soft); }
p.lead { font-size: clamp(1.1rem, 1.6vw, 1.32rem); color: var(--ink); line-height: 1.6; }
a { color: var(--ink); text-decoration: none; }
ul { margin: 0 0 1.1em; padding-left: 1.1em; }
li { margin: 0.35em 0; color: var(--ink-soft); }

.eyebrow {
  font-family: var(--sans);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1rem;
}
.eyebrow.muted { color: var(--ink-faint); }

/* ---------- Layout ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad); }
.narrow { max-width: var(--textw); }
section { padding: clamp(64px, 9vw, 112px) 0; }
.section-alt { background: var(--paper-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: var(--textw); margin-bottom: clamp(36px, 5vw, 60px); }
.section-head p { margin-top: 0.6rem; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250,248,244,0.86);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad); height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between; }
.brand { font-family: var(--serif); font-size: 1.4rem; font-weight: 560; letter-spacing: 0.02em; display: flex; align-items: baseline; gap: 0.5rem; }
.brand small { font-family: var(--sans); font-size: 0.62rem; font-weight: 600; letter-spacing: 0.22em; text-transform: uppercase; color: var(--ink-faint); }
.nav-links { display: flex; align-items: center; gap: 28px; margin-left: 32px; }
.nav-links a { font-size: 0.92rem; color: var(--ink-soft); font-weight: 500; transition: color .15s ease; }
.nav-links a:hover { color: var(--ink); }
.nav-cta { margin-left: 8px; background: var(--accent) !important; color: #fff !important; border-color: var(--accent) !important; }
.nav-cta:hover { background: var(--accent-deep) !important; }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 1.5px; background: var(--ink); margin: 5px 0; transition: .2s; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  font-family: var(--sans); font-size: 0.95rem; font-weight: 600; letter-spacing: 0.01em;
  padding: 14px 26px; border-radius: 2px; border: 1px solid transparent; cursor: pointer;
  transition: background .18s ease, color .18s ease, border-color .18s ease; text-decoration: none;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-deep); }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-deep); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--paper); }
.btn-sm { padding: 11px 20px; font-size: 0.88rem; }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 1.6rem; }

/* ---------- Hero ---------- */
.hero { padding: clamp(70px, 11vw, 140px) 0 clamp(56px, 8vw, 96px); }
.hero .eyebrow { margin-bottom: 1.4rem; }
.hero h1 { max-width: 16ch; }
.hero .lead { max-width: 52ch; margin-top: 1.6rem; }
.hero-rule { height: 1px; background: var(--line); margin-top: clamp(48px, 7vw, 80px); }
.hero-meta { display: flex; flex-wrap: wrap; gap: 28px; margin-top: 28px; font-size: 0.86rem; color: var(--ink-faint); letter-spacing: 0.02em; }
.hero-meta b { color: var(--ink); font-weight: 600; }

/* ---------- Generic grids ---------- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: clamp(24px, 3vw, 44px); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 2.4vw, 36px); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(18px, 2vw, 30px); }
@media (max-width: 900px){ .grid-3, .grid-4 { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 620px){ .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

/* ---------- Cards ---------- */
.card { border: 1px solid var(--line); background: #fff; padding: clamp(22px, 2.4vw, 32px); border-radius: 3px; transition: border-color .2s ease, transform .2s ease; }
.card:hover { border-color: var(--line-2); }
.card .k { font-family: var(--sans); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); margin-bottom: 0.7rem; }
.card h3 { margin-bottom: 0.5rem; }
.card p { font-size: 0.96rem; margin: 0; }
.card ul { margin: 0.6rem 0 0; padding-left: 1.05em; font-size: 0.94rem; }

/* practice-area tall card */
.practice { border-top: 2px solid var(--ink); }
.practice .num { font-family: var(--serif); font-size: 0.95rem; color: var(--ink-faint); margin-bottom: 0.8rem; }

/* ---------- Approach steps ---------- */
.steps { counter-reset: step; }
.step { padding: 28px 0; border-top: 1px solid var(--line); }
.step:first-child { border-top: 0; }
.step .n { font-family: var(--serif); font-size: 2.4rem; color: var(--accent); line-height: 1; margin-bottom: 0.5rem; }
.step h3 { margin-bottom: 0.4rem; }
.step p { margin: 0; font-size: 0.98rem; }

/* ---------- Engagement list ---------- */
.engage-list { border-top: 1px solid var(--line); }
.engage-item { display: flex; gap: 20px; align-items: baseline; padding: 20px 0; border-bottom: 1px solid var(--line); }
.engage-item .tag { font-family: var(--sans); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-faint); min-width: 150px; }
.engage-item .t { font-family: var(--serif); font-size: 1.18rem; color: var(--ink); }
@media (max-width: 620px){ .engage-item { flex-direction: column; gap: 4px; } .engage-item .tag { min-width: 0; } }

/* ---------- Why / themes ---------- */
.theme { padding: 22px 0; border-top: 1px solid var(--line); }
.theme:first-child { border-top: 0; }
.theme h4 { margin-bottom: 0.3rem; }
.theme p { margin: 0; font-size: 0.96rem; }

/* ---------- Questions (why engage) ---------- */
.questions { columns: 2; column-gap: 40px; }
.questions li { break-inside: avoid; font-family: var(--serif); font-size: 1.12rem; color: var(--ink); list-style: none; margin: 0 0 14px; padding-left: 0; }
.questions li::before { content: "— "; color: var(--accent); }
@media (max-width: 620px){ .questions { columns: 1; } }

/* ---------- Two-col prose (about) ---------- */
.prose-split { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(32px, 5vw, 72px); }
@media (max-width: 820px){ .prose-split { grid-template-columns: 1fr; } }

/* ---------- Founder / team ---------- */
.person { display: flex; gap: 22px; align-items: flex-start; padding: 22px 0; border-top: 1px solid var(--line); }
.person:first-child { border-top: 0; }
.person .av { width: 56px; height: 56px; border-radius: 50%; background: var(--paper-2); border: 1px solid var(--line-2); flex: 0 0 auto; display: grid; place-items: center; font-family: var(--serif); font-size: 1.1rem; color: var(--ink-faint); }
.person .role { font-size: 0.78rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin: 0 0 0.3rem; }
.person h4 { margin: 0 0 0.4rem; }
.person p { font-size: 0.95rem; margin: 0; }

/* ---------- Contact form ---------- */
.form { max-width: 620px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 0.82rem; font-weight: 600; color: var(--ink); margin-bottom: 7px; letter-spacing: 0.01em; }
.field input, .field textarea, .field select {
  width: 100%; font-family: var(--sans); font-size: 1rem; color: var(--ink);
  background: #fff; border: 1px solid var(--line-2); border-radius: 2px; padding: 13px 14px; transition: border-color .15s ease;
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--accent); }
.field textarea { min-height: 130px; resize: vertical; }
.form-note { font-size: 0.86rem; color: var(--ink-faint); margin-top: 0.4rem; }
.reassure { font-size: 0.92rem; color: var(--ink-soft); margin-top: 1.4rem; }

/* ---------- CTA band ---------- */
.cta-band { background: var(--ink); color: var(--paper); border-radius: 4px; padding: clamp(40px, 6vw, 72px); }
.cta-band h2 { color: var(--paper); }
.cta-band p { color: #C9C4BA; }
.cta-band .btn-primary { background: var(--paper); color: var(--ink); }
.cta-band .btn-primary:hover { background: #fff; }
.cta-band .btn-ghost { border-color: var(--paper); color: var(--paper); }
.cta-band .btn-ghost:hover { background: var(--paper); color: var(--ink); }

/* ---------- Footer ---------- */
.footer { background: #14140F; color: #B9B4A8; padding: clamp(56px, 7vw, 88px) 0 40px; }
.footer a { color: #CFCABE; }
.footer a:hover { color: #fff; }
.footer .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
.footer h5 { font-family: var(--sans); font-size: 0.74rem; letter-spacing: 0.16em; text-transform: uppercase; color: #7E796E; margin: 0 0 16px; }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin: 0.5em 0; font-size: 0.92rem; }
.footer .brand { color: #fff; font-size: 1.5rem; margin-bottom: 14px; }
.footer .tag { font-size: 0.9rem; max-width: 30ch; color: #9C978B; }
.footer .bottom { border-top: 1px solid #2A2A22; margin-top: 48px; padding-top: 22px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 0.82rem; color: #7E796E; }
@media (max-width: 820px){ .footer .cols { grid-template-columns: 1fr 1fr; } }
@media (max-width: 540px){ .footer .cols { grid-template-columns: 1fr; } }

/* ---------- Reveal (subtle) ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce){ .reveal { opacity: 1; transform: none; transition: none; } }

/* ---------- Mobile nav ---------- */
@media (max-width: 880px){
  .nav-links {
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch; gap: 0; padding: 8px var(--pad) 20px;
    max-height: 0; overflow: hidden; transition: max-height .25s ease; box-shadow: 0 16px 30px rgba(0,0,0,0.05);
  }
  .nav-links.open { max-height: 80vh; }
  .nav-links a { padding: 13px 0; border-bottom: 1px solid var(--line); font-size: 1rem; }
  .nav-cta { margin: 12px 0 0; }
  .nav-toggle { display: block; }
}

/* ---------- Page intro spacing (under sticky nav) ---------- */
.page-top { padding-top: calc(var(--nav-h) + clamp(48px, 7vw, 96px)); }