/* ============================================================================
 * __bs-role-landing.css — shared stylesheet for the two role/market landings:
 *   /au  (Buyer Space · Australia · EN)   body[data-role="buyer"]
 *   /vn  (Seller Space · Việt Nam · VI)   body[data-role="seller"] lang="vi"
 *
 * Design law: frontend/design/DESIGN-SYSTEM.md (BS-F1-FINALISE-V7) + design/f1-v7/tokens.json
 *   "Trade Folio — trade in plain sight": mineral daylight, material and calm.
 *   Structural rules 0px · controls 8px-free (action.radius = 0) · action height 44px.
 *   Teal = the role-neutral primary; Buyer blue / Seller green are ROLE ENCODINGS,
 *   never decorative. No gradients, no glass, no floating card grids.
 *   Manrope = display + interface; IBM Plex Mono = commercial data, IDs, units.
 *
 * One file, not two: the AU and VN designs were 95% identical CSS. Keeping two
 * copies is how a design system drifts — the role difference is one attribute.
 * ========================================================================== */
:root{
  --parchment:#F1EEE5; --chalk:#FCFBF7; --graphite:#1C2520; --ash:#66716B; --hair:#D8D5CB; --hair-2:#E6E3DA;
  --teal:#167C78; --deep:#0F5E5B; --soft:#E2EFED;
  --buyer:#3666DC; --buyer-hover:#2A52B8; --buyer-soft:#E7EDFB;
  --seller:#51AF83; --seller-ink:#2E7D58; --seller-hover:#246647; --seller-soft:#E6F4EC;
  --bronze:#8A5A16; --bronze-soft:#F6EBD9;
  --sans:'Manrope',system-ui,-apple-system,'Segoe UI',sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --w:1280px; --read:760px;
  /* Role accent — set per page by body[data-role]; defaults to the neutral primary. */
  --role:var(--teal); --role-ink:var(--deep);
}
body[data-role="buyer"]{--role:var(--buyer);--role-ink:var(--buyer)}
body[data-role="seller"]{--role:var(--seller);--role-ink:var(--seller-ink)}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--parchment);color:var(--graphite);font-family:var(--sans);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:clip}
/* Vietnamese sets tighter: diacritics need leading, and words run longer than English. */
body:lang(vi){line-height:1.65}
.wrap{max-width:var(--w);margin:0 auto;padding:0 24px}
h1,h2,h3{font-family:var(--sans);font-weight:700;line-height:1.1;margin:0;letter-spacing:-.02em;text-wrap:balance}
h1{font-size:clamp(34px,5.2vw,60px)} h2{font-size:clamp(26px,3.2vw,38px)} h3{font-size:20px;line-height:1.3}
body:lang(vi) h1{font-size:clamp(32px,5vw,56px);line-height:1.12}
body:lang(vi) h2{font-size:clamp(25px,3.1vw,36px)}
p{margin:0} a{color:var(--deep)}
:focus-visible{outline:2px solid var(--teal);outline-offset:3px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--deep);margin:0 0 18px}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--teal)}
.eyebrow.buyer{color:var(--buyer)} .eyebrow.buyer::before{background:var(--buyer)}
.eyebrow.seller{color:var(--seller-ink)} .eyebrow.seller::before{background:var(--seller)}

/* Controls — radius 0 and height 44px are token contracts, not taste. */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;height:44px;padding:0 20px;border:1.5px solid var(--graphite);border-radius:0;background:var(--graphite);color:#fff;font-weight:600;font-size:15px;text-decoration:none;white-space:nowrap}
.btn:hover{background:#0F1512}
.btn.teal{background:var(--teal);border-color:var(--teal)} .btn.teal:hover{background:var(--deep);border-color:var(--deep)}
.btn.ghost{background:transparent;color:var(--graphite)} .btn.ghost:hover{background:var(--chalk)}
.btn.buyer{background:var(--buyer);border-color:var(--buyer)} .btn.buyer:hover{background:var(--buyer-hover);border-color:var(--buyer-hover)}
.btn.seller{background:var(--seller-ink);border-color:var(--seller-ink)} .btn.seller:hover{background:var(--seller-hover);border-color:var(--seller-hover)}

.nav{position:sticky;top:0;z-index:20;background:rgba(252,251,247,.96);border-bottom:1px solid var(--hair)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--graphite);font-weight:700;letter-spacing:-.01em}
.brand img{width:34px;height:34px;display:block}
.brand .tl{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--ash);border-left:1px solid var(--hair);padding-left:10px;font-weight:500}
.nav .right{display:flex;align-items:center;gap:10px}
.lang{display:inline-flex;border:1px solid var(--hair);font-family:var(--mono);font-size:11px}
.lang a,.lang span{padding:8px 10px;text-decoration:none;color:var(--ash);white-space:nowrap} .lang span{background:var(--graphite);color:#fff}
.nav .btn{height:38px;padding:0 14px;font-size:14px}
@media (pointer:coarse){.nav .btn{height:44px}.lang a,.lang span{padding:12px 10px}}
@media (max-width:900px){.brand .tl{display:none}}
@media (max-width:640px){.nav .login{display:none}}
@media (max-width:420px){.nav .btn{padding:0 10px;font-size:13px}}

.hero{padding:clamp(48px,7vh,96px) 0 clamp(40px,6vh,72px);border-bottom:1px solid var(--hair)}
.hero .g{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:48px;align-items:start}
.hero p.lead{font-size:18px;color:var(--ash);max-width:var(--read);margin-top:22px}
.hero .cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero .note{font-family:var(--mono);font-size:12px;color:var(--ash);margin-top:14px;letter-spacing:.02em}
.hero h1 b{color:var(--role-ink);font-weight:700}
@media (max-width:900px){.hero .g{grid-template-columns:1fr}}

/* The folio sheet — a document lifted off the table, drawn with rules not shadow. */
.folio{background:var(--chalk);border:1px solid var(--hair);padding:20px;position:relative}
.folio::before{content:"";position:absolute;inset:6px -6px -6px 6px;border:1px solid var(--hair-2);z-index:-1;background:var(--chalk)}
.folio .hd{display:flex;justify-content:space-between;align-items:baseline;font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ash);border-bottom:1px solid var(--hair);padding-bottom:10px}
.folio .row{display:grid;grid-template-columns:120px 1fr;gap:12px;padding:12px 0;border-bottom:1px solid var(--hair-2);font-size:14px}
.folio .row .k{font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--ash);padding-top:3px}
.folio .row:last-child{border-bottom:0}
.pill{display:inline-block;font-family:var(--mono);font-size:11px;padding:3px 8px;border:1px solid var(--hair);color:var(--graphite)}
.pill.buyer{border-color:var(--buyer);color:var(--buyer)}
.pill.seller{border-color:var(--seller);color:var(--seller-ink)}
.pill.teal{border-color:var(--teal);color:var(--deep);background:var(--soft)}
.pill.sample{border-color:var(--bronze);color:var(--bronze);background:var(--bronze-soft)}

.sheet{padding:clamp(48px,7vh,84px) 0;border-bottom:1px solid var(--hair)}
.sheet.chalk{background:var(--chalk)}
.sheet .idx{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ash);margin-bottom:14px}
.sheet p.lead{color:var(--ash);max-width:var(--read);margin-top:16px;font-size:17px}

.ledger{margin-top:32px;border-top:1px solid var(--graphite)}
.ledger .r{display:grid;grid-template-columns:56px 1fr 1fr;gap:20px;padding:20px 0;border-bottom:1px solid var(--hair)}
.ledger .n{font-family:var(--mono);font-size:12px;color:var(--ash);padding-top:4px}
.ledger h3{font-size:18px}
.ledger .r p{color:var(--ash);font-size:15px}
@media (max-width:760px){.ledger .r{grid-template-columns:40px 1fr}.ledger .r p{grid-column:2}}

.shot{margin-top:32px;background:var(--chalk);border:1px solid var(--hair);padding:12px}
.shot img{display:block;width:100%;height:auto;border:1px solid var(--hair-2)}
.shot .cap{display:flex;flex-wrap:wrap;gap:10px 18px;align-items:center;justify-content:space-between;padding:12px 4px 2px;font-family:var(--mono);font-size:11.5px;color:var(--ash)}

.stages{display:grid;grid-template-columns:repeat(5,1fr);gap:0;margin-top:32px;border:1px solid var(--hair);background:var(--chalk)}
.stages .s{padding:20px 18px;border-right:1px solid var(--hair)} .stages .s:last-child{border-right:0}
.stages .s .k{font-family:var(--mono);font-size:11px;color:var(--ash);letter-spacing:.08em}
.stages .s h3{font-size:17px;margin:8px 0 8px}
.stages .s p{font-size:13.5px;color:var(--ash)}
.stages .s.on h3{color:var(--role-ink)} .stages .s.on{box-shadow:inset 0 3px 0 var(--role)}
@media (max-width:900px){.stages{grid-template-columns:1fr 1fr}.stages .s{border-bottom:1px solid var(--hair)}}
@media (max-width:520px){.stages{grid-template-columns:1fr}}

.two{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:32px}
.card{background:var(--chalk);border:1px solid var(--hair);padding:24px}
.card.role-b{box-shadow:inset 4px 0 0 var(--buyer)} .card.role-s{box-shadow:inset 4px 0 0 var(--seller)}
.card ul{margin:14px 0 0;padding:0;list-style:none}
.card li{padding:10px 0;border-top:1px solid var(--hair-2);font-size:15px;display:grid;grid-template-columns:28px 1fr;gap:8px}
.card li .n{font-family:var(--mono);font-size:11px;color:var(--ash);padding-top:4px}
@media (max-width:820px){.two{grid-template-columns:1fr}}

.margin{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:32px}
.margin .side{background:var(--chalk);border:1px solid var(--hair);padding:24px}
.margin .side h3{font-size:16px;font-family:var(--mono);font-weight:500;letter-spacing:.06em;text-transform:uppercase;color:var(--ash)}
.agents{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:16px}
.agents div{border:1px solid var(--hair);padding:10px;font-size:13px;background:var(--parchment)}
.agents div b{display:block;font-family:var(--mono);font-size:11px;font-weight:500;color:var(--ash);letter-spacing:.06em}
@media (max-width:820px){.margin{grid-template-columns:1fr}.agents{grid-template-columns:1fr 1fr}}

.trust{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:32px;border:1px solid var(--hair);background:var(--chalk)}
.trust div{padding:22px 20px;border-right:1px solid var(--hair)} .trust div:last-child{border-right:0}
.trust b{display:block;font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--deep);margin-bottom:8px;font-weight:500}
.trust p{font-size:14.5px;color:var(--ash)}
@media (max-width:820px){.trust{grid-template-columns:1fr 1fr}.trust div{border-bottom:1px solid var(--hair)}}
@media (max-width:480px){.trust{grid-template-columns:1fr}}

.facts{margin-top:32px;border-top:1px solid var(--graphite)}
.facts .r{display:grid;grid-template-columns:140px 1fr 200px;gap:20px;padding:18px 0;border-bottom:1px solid var(--hair);align-items:baseline}
.facts .v{font-family:var(--mono);font-size:26px;font-weight:600;color:var(--graphite);font-variant-numeric:tabular-nums}
.facts .src{font-family:var(--mono);font-size:11px;color:var(--ash);text-align:right}
@media (max-width:700px){.facts .r{grid-template-columns:1fr}.facts .src{text-align:left}}

.faq{margin-top:28px;max-width:var(--read)}
.faq details{border-top:1px solid var(--hair);padding:16px 0} .faq details:last-child{border-bottom:1px solid var(--hair)}
.faq summary{cursor:pointer;font-weight:600;font-size:17px;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--mono);color:var(--ash)}
.faq details[open] summary::after{content:"–"}
.faq p{color:var(--ash);margin-top:10px;font-size:15px}

.final{padding:clamp(56px,8vh,96px) 0;background:var(--chalk)}
.final .g{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:28px}
.final .choice{border:1px solid var(--hair);padding:24px;background:var(--parchment)}
.final .choice.b{box-shadow:inset 0 3px 0 var(--buyer)} .final .choice.s{box-shadow:inset 0 3px 0 var(--seller)}
.final .choice .btn{margin-top:16px}
@media (max-width:760px){.final .g{grid-template-columns:1fr}}

footer{padding:28px 0 40px;font-family:var(--mono);font-size:11.5px;color:var(--ash);border-top:1px solid var(--hair)}
footer .wrap{display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between}
footer a{color:var(--ash)}

@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}