/* ==========================================================================
   BDI Buyer Hub + Partner Portal — shared chrome.
   Tokens come from tokens.css (Building Data Intelligence design system).
   No raw colour here: every value is a --bdi-* swatch or a semantic role.
   ========================================================================== */
@import url("tokens.css");

* { box-sizing: border-box; margin: 0; padding: 0; }
html { background: var(--bdi-ink); scroll-padding-top: 96px; }
body {
  background: var(--bdi-slate); color: var(--bdi-paper);
  font: 400 var(--t-body)/var(--lh-body) var(--font-body);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3, p { text-wrap: pretty; }

.wrap { width: min(1320px, 100% - 2 * clamp(20px, 4vw, 56px)); margin: 0 auto; }
.band { padding: var(--s-9) 0; }
.band.tight { padding: var(--s-8) 0; }

/* ---- Concept banner: states plainly that this is a mock-up ------------- */
.concept {
  background: var(--bdi-ink); color: var(--bdi-mist);
  border-bottom: 1px solid var(--bdi-line-dark);
  font: 500 var(--t-caption)/1.4 var(--font-body); letter-spacing: 0.04em;
}
.concept .wrap { display: flex; flex-wrap: wrap; gap: 4px 18px; padding: 10px 0; }
.concept b { color: var(--bdi-paper); font-weight: 600; }

/* ---- Masthead: flat ink bar, no glass (DESIGN.md §1) -------------------- */
.masthead { position: sticky; top: 0; z-index: 40; background: var(--bdi-ink); border-bottom: 1px solid var(--bdi-line-dark); }
.masthead .wrap { display: flex; align-items: center; gap: var(--s-6); min-height: 72px; }
.brand { display: inline-flex; align-items: center; gap: 14px; text-decoration: none; flex: none; }
.brand img { width: 196px; height: auto; }
.brand span {
  padding-left: 14px; border-left: 1px solid var(--bdi-line-dark);
  font: 500 var(--t-caption)/1 var(--font-body); letter-spacing: 0.22em; text-transform: uppercase; color: var(--bdi-mist);
}
.brand:focus-visible, .nav a:focus-visible, .nav-toggle:focus-visible { outline: 3px solid var(--bdi-paper); outline-offset: 4px; border-radius: 2px; }
.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav a {
  display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 0 12px;
  font: 500 var(--t-caption)/1 var(--font-body); letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--bdi-mist); text-decoration: none;
  text-decoration-line: underline; text-decoration-color: transparent; text-decoration-thickness: 2px; text-underline-offset: 8px;
  transition: color var(--dur-control) var(--ease), text-decoration-color var(--dur-control) var(--ease);
}
.nav a:hover, .nav a[aria-current] { color: var(--bdi-paper); text-decoration-color: var(--bdi-mist); }
.nav a.nav-btn { border: 1px solid var(--bdi-mist); border-radius: var(--r-control); margin-left: 8px; color: var(--bdi-paper); text-decoration: none; }
.nav a.nav-btn:hover { border-color: var(--bdi-paper); }
.nav svg, .ico { width: 15px; height: 15px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.nav-toggle {
  display: none; margin-left: auto; min-height: 44px; padding: 0 16px; background: transparent;
  border: 1px solid var(--bdi-mist); border-radius: var(--r-control); cursor: pointer;
  font: 700 var(--t-caption)/1 var(--font-body); letter-spacing: 0.2em; text-transform: uppercase;
}

/* ---- Type ---------------------------------------------------------------- */
.eyebrow { font: 500 var(--t-label)/1 var(--font-body); letter-spacing: 0.22em; text-transform: uppercase; color: var(--eyebrow); margin-bottom: var(--s-5); display: flex; align-items: center; gap: 10px; }
.display, .h1, .h2 { font-family: var(--font-display); font-weight: 400; text-transform: uppercase; letter-spacing: var(--track-display); line-height: var(--lh-display); }
.display { font-size: clamp(64px, 9vw, var(--t-display)); }
.h1 { font-size: clamp(44px, 5vw, var(--t-h1)); }
.h2 { font-size: var(--t-h2); }
.lead { font-size: var(--t-lead); line-height: 1.45; color: var(--fg-lead); max-width: 56ch; }
.body-muted { color: var(--muted); max-width: 65ch; }
.section-head { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: var(--s-7); align-items: end; margin-bottom: var(--s-7); }
.section-head p { color: var(--muted); max-width: 56ch; }

/* ---- Tags + access marks ------------------------------------------------- */
.meta { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  display: inline-flex; align-items: center; gap: 7px; min-height: 28px; padding: 0 10px;
  border: 1px solid var(--control-edge); border-radius: var(--r-control);
  font: 700 12px/1 var(--font-body); letter-spacing: 0.16em; text-transform: uppercase; color: var(--fg);
}
.tag.sample { border-style: dashed; color: var(--muted); }
.tag .ico { width: 13px; height: 13px; }
.tag.live::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }

/* ---- Buttons (tokens.css .bdi-btn is the base) -------------------------- */
.bdi-btn { min-height: 44px; padding: 0 var(--s-5); font-size: 13px; }
.bdi-btn .ico { width: 16px; height: 16px; }
.bdi-btn--sm { min-height: 40px; padding: 0 14px; font-size: 12px; letter-spacing: 0.16em; }

/* ---- Toast: dummy links announce themselves instead of 404ing ----------- */
.toast {
  position: fixed; left: 50%; bottom: 28px; z-index: 90; transform: translate(-50%, 16px); opacity: 0; pointer-events: none;
  display: flex; align-items: center; gap: 12px; max-width: min(560px, calc(100% - 32px));
  padding: 14px 18px; background: var(--bdi-ink); color: var(--bdi-paper);
  border: 1px solid var(--bdi-mist); border-radius: var(--r-control);
  font: 500 var(--t-label)/1.4 var(--font-body);
  transition: opacity 200ms var(--ease), transform 200ms var(--ease);
}
.toast[data-show="true"] { opacity: 1; transform: translate(-50%, 0); }
.toast b { font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; font-size: 12px; color: var(--bdi-mist); }

/* ---- Footer -------------------------------------------------------------- */
.site-foot { background: var(--bdi-ink); border-top: 1px solid var(--bdi-line-dark); color: var(--bdi-mist); font-size: var(--t-label); }
.site-foot .wrap { display: grid; grid-template-columns: 1fr auto; gap: var(--s-5); align-items: center; padding: var(--s-7) 0; }
.site-foot strong { color: var(--bdi-paper); font-weight: 600; }
.site-foot .mark { width: 22px; opacity: 0.5; }

@media (max-width: 1080px) {
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; padding: 8px clamp(20px, 4vw, 56px) 16px; background: var(--bdi-ink); border-bottom: 1px solid var(--bdi-line-dark); }
  .masthead[data-open="true"] .nav { display: flex; }
  .nav a.nav-btn { margin: 8px 0 0; justify-content: center; }
  .nav-toggle { display: inline-flex; align-items: center; }
  .section-head { grid-template-columns: 1fr; gap: var(--s-4); }
}
@media (max-width: 700px) {
  .band { padding: var(--s-8) 0; }
  .brand img { width: 150px; }
  .brand span { display: none; }
  .site-foot .wrap { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { .toast, .nav a { transition: none; } }