/* Build Intelligence (B2B editorial) -- Sunlit Studio, 2026-10-05.
   Uses the site tokens from sunlit-brand.css. Editorial publication, not a
   product page: hairline rules, generous measure, no cards, shadows or gradients. */
.bi-page { background: var(--paper); }
.bi-wrap { max-width: 1120px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 48px); }
.bi-read { max-width: 720px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 24px); }
.bi-eyebrow { font-family: var(--body); font-size: .72rem; font-weight: 600; letter-spacing: .24em; text-transform: uppercase; color: var(--brass-d); margin: 0 0 14px; }
.bi-meta { display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: .72rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--greige); margin: 0 0 12px; }
.bi-meta > * + *::before { content: ""; }
.bi-link { color: var(--brass-d); font-size: .78rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; text-decoration: none; border-bottom: 1px solid var(--brass); padding-bottom: 3px; }
.bi-link:hover, .bi-link:focus-visible { color: var(--ink); border-bottom-color: var(--ink); }
.bi-link--quiet { color: var(--greige); border-bottom-color: var(--stone-line); }
.bi-draft { color: #8A3B2E; }
.bi-draftbar { display: block; width: 100%; max-width: none; box-sizing: border-box; margin: 0; padding: 10px 16px; background: #F3E6E1; color: #8A3B2E; font-size: .78rem; font-weight: 600; letter-spacing: .12em; text-align: center; }

/* Landing */
.bi-hero { padding: clamp(64px, 10vw, 128px) 0 clamp(40px, 6vw, 72px); border-bottom: 1px solid var(--stone-line); }
.bi-h1 { font-family: var(--display); font-weight: 400; font-size: clamp(2.3rem, 5.4vw, 4.4rem); line-height: 1.04; letter-spacing: .01em; color: var(--ink); max-width: 17ch; margin: 0 0 26px; }
.bi-h1 em { font-style: italic; color: var(--brass-d); }
.bi-descriptor { font-family: var(--display); font-style: italic; font-size: clamp(1.2rem, 2vw, 1.45rem); color: var(--ink); max-width: 46ch; margin: 0 0 18px; }
.bi-lede { color: var(--greige); max-width: 62ch; margin: 0 0 26px; font-size: 1.02rem; line-height: 1.7; }
.bi-principle { margin: 0 0 30px; padding-left: 18px; border-left: 2px solid var(--brass); max-width: 52ch; font-family: var(--display); font-size: 1.25rem; line-height: 1.4; color: var(--ink); }
.bi-sec { padding: clamp(48px, 7vw, 88px) 0; border-bottom: 1px solid var(--stone-line); }
.bi-sec--note { border-bottom: 0; padding-top: 32px; }
.bi-sec-head { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: end; border-bottom: 1px solid var(--ink); padding-bottom: 16px; margin-bottom: 32px; }
.bi-sec-h { font-family: var(--display); font-weight: 400; font-size: clamp(1.6rem, 3vw, 2.2rem); text-transform: uppercase; letter-spacing: .04em; margin: 0; }
.bi-sec-head p { color: var(--greige); margin: 0; }
.bi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 40px; }
.bi-card { border-top: 1px solid var(--stone-line); padding-top: 22px; }
.bi-card-h { font-family: var(--display); font-weight: 500; font-size: clamp(1.4rem, 2.4vw, 1.75rem); line-height: 1.15; margin: 0 0 12px; }
.bi-card-h a { color: var(--ink); text-decoration: none; }
.bi-card-h a:hover, .bi-card-h a:focus-visible { color: var(--brass-d); }
.bi-card-deck { color: var(--greige); margin: 0 0 14px; line-height: 1.65; }
.bi-card-src { font-size: .78rem; letter-spacing: .06em; color: var(--greige); margin: 0 0 18px; }
.bi-card--lead { display: grid; grid-template-columns: 7fr 5fr; gap: clamp(24px, 4vw, 56px); align-items: center; border-top: 0; padding-top: 0; }
.bi-card--lead .bi-card-h { font-size: clamp(1.9rem, 3.6vw, 2.8rem); }
.bi-card-img img, .bi-figure img { display: block; width: 100%; height: auto; }
.bi-sec--featured .bi-eyebrow { margin-bottom: 28px; }

/* Weekly Intelligence Brief signup */
.bi-signup { background: #F4EFE7; padding: clamp(48px, 7vw, 88px) clamp(16px, 4vw, 48px); border-top: 1px solid var(--stone-line); border-bottom: 1px solid var(--stone-line); }
.bi-signup-inner { max-width: 720px; margin: 0 auto; }
.bi-signup-h { font-family: var(--display); font-weight: 400; font-size: clamp(1.6rem, 3vw, 2.3rem); line-height: 1.15; margin: 0 0 14px; }
.bi-signup-copy { color: var(--greige); margin: 0 0 24px; }
.bi-fields { display: grid; grid-template-columns: 3fr 2fr; gap: 16px; margin-bottom: 18px; }
.bi-fld { display: flex; flex-direction: column; gap: 6px; font-size: .72rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--ink); }
.bi-fld em { font-style: normal; font-weight: 400; letter-spacing: .04em; text-transform: none; color: var(--greige); }
.bi-fld input { font: inherit; font-size: 1rem; letter-spacing: 0; text-transform: none; font-weight: 400; padding: 12px 0; border: 0; border-bottom: 1px solid var(--ink); background: transparent; color: var(--ink); }
.bi-fld input:focus-visible { outline: 2px solid var(--brass); outline-offset: 2px; }
.bi-fld input[aria-invalid="true"] { border-bottom-color: #8A3B2E; }
.bi-form .btn { cursor: pointer; }
.bi-consent { font-size: .82rem; color: var(--greige); margin: 16px 0 0; max-width: 60ch; }
.bi-consent a { color: var(--brass-d); }
.bi-msg { margin: 12px 0 0; font-size: .95rem; color: var(--ink); min-height: 1.4em; }
.bi-msg.err { color: #8A3B2E; }
.bi-form .hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* Article */
.bi-art-head { padding: clamp(48px, 8vw, 96px) 0 clamp(28px, 4vw, 40px); }
.bi-crumb { font-size: .78rem; letter-spacing: .08em; color: var(--greige); margin-bottom: 22px; }
.bi-crumb a { color: var(--brass-d); text-decoration: none; }
.bi-art-h1 { font-family: var(--display); font-weight: 400; font-size: clamp(2.2rem, 5vw, 3.8rem); line-height: 1.06; margin: 0 0 20px; color: var(--ink); }
.bi-art-deck { font-family: var(--display); font-size: clamp(1.2rem, 2vw, 1.45rem); line-height: 1.45; color: var(--greige); margin: 0; }
.bi-figure { max-width: 1120px; margin: 0 auto clamp(32px, 5vw, 64px); padding: 0 clamp(16px, 4vw, 48px); }
.bi-block { padding: 36px 0; border-top: 1px solid var(--stone-line); }
.bi-block p { line-height: 1.75; margin: 0 0 16px; color: var(--ink); }
.bi-block-h { font-family: var(--body); font-size: .74rem; font-weight: 600; letter-spacing: .24em; text-transform: uppercase; color: var(--brass-d); margin: 0 0 18px; }
.bi-mini-h { font-family: var(--body); font-size: .7rem; font-weight: 600; letter-spacing: .18em; text-transform: uppercase; color: var(--greige); margin: 26px 0 10px; }
.bi-evidence { background: #FAF8F4; border-top: 1px solid var(--stone-line); padding: 32px clamp(18px, 3vw, 32px); margin: 0 calc(-1 * clamp(18px, 3vw, 32px)); }
.bi-srcitem + .bi-srcitem { border-top: 1px solid var(--stone-line); margin-top: 26px; padding-top: 22px; }
.bi-src-label { font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: var(--greige); margin: -8px 0 16px !important; }
.bi-src { display: grid; grid-template-columns: 9.5rem 1fr; gap: 6px 16px; margin: 0 0 24px; font-size: .95rem; }
.bi-src dt { color: var(--greige); font-size: .8rem; letter-spacing: .06em; padding-top: 2px; }
.bi-src dd { margin: 0; color: var(--ink); }
.bi-quote { margin: 8px 0 8px; padding: 6px 0 6px 22px; border-left: 2px solid var(--ink); }
.bi-quote p { font-family: var(--display); font-size: clamp(1.3rem, 2.4vw, 1.65rem); line-height: 1.35; margin: 0 0 10px !important; }
.bi-quote footer { font-size: .82rem; color: var(--greige); letter-spacing: .04em; }
.bi-list { margin: 0; padding-left: 1.1em; color: var(--ink); line-height: 1.65; }
.bi-list li { margin-bottom: 8px; }
.bi-outbound { display: inline-block; margin-top: 18px; color: var(--brass-d); font-size: .78rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; text-decoration: none; border-bottom: 1px solid var(--brass); padding-bottom: 3px; }
.bi-perspective { border-top: 2px solid var(--brass); }
.bi-perspective p { font-family: var(--display); font-size: clamp(1.25rem, 2.2vw, 1.5rem); line-height: 1.5; }
.bi-perspective p:nth-child(3) { font-style: italic; color: var(--brass-d); }
.bi-impl { list-style: none; margin: 0; padding: 0; }
.bi-impl li { display: grid; grid-template-columns: 9.5rem 1fr; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--stone-line); }
.bi-impl li:last-child { border-bottom: 0; }
.bi-kind { font-size: .7rem; font-weight: 600; letter-spacing: .18em; text-transform: uppercase; color: var(--brass-d); padding-top: 5px; }
.bi-impl p { margin: 0 !important; }
.bi-steps { list-style: none; counter-reset: s; margin: 24px 0 28px; padding: 0; border-left: 1px solid var(--brass); }
.bi-steps li { counter-increment: s; position: relative; padding: 0 0 22px 28px; display: grid; gap: 2px; }
.bi-steps li::before { content: ""; position: absolute; left: -4px; top: 6px; width: 7px; height: 7px; background: var(--paper); border: 1px solid var(--brass); }
.bi-step-label { font-size: .7rem; font-weight: 600; letter-spacing: .18em; text-transform: uppercase; color: var(--greige); }
.bi-step-cap { font-family: var(--display); font-size: 1.45rem; color: var(--ink); text-decoration: none; text-transform: uppercase; letter-spacing: .05em; }
.bi-step-cap:hover, .bi-step-cap:focus-visible { color: var(--brass-d); }
.bi-step-line { font-family: var(--display); font-style: italic; color: var(--brass-d); }
.bi-os-links { display: flex; flex-wrap: wrap; gap: 14px 28px; }
.bi-back { padding: 28px 0 56px; border-top: 1px solid var(--stone-line); }

/* Sunlit Studio OS page module */
.bi-osmod { padding: clamp(48px, 7vw, 88px) clamp(16px, 4vw, 48px); background: var(--paper); border-top: 1px solid var(--stone-line); }
.bi-osmod-inner { max-width: 820px; margin: 0 auto; border-left: 2px solid var(--brass); padding-left: clamp(18px, 3vw, 32px); }
.bi-osmod-h { font-family: var(--display); font-weight: 400; font-size: clamp(1.7rem, 3.4vw, 2.5rem); line-height: 1.12; margin: 0 0 14px; }
.bi-osmod-copy { color: var(--greige); line-height: 1.7; margin: 0 0 10px; max-width: 62ch; }
.bi-osmod-links { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 28px; margin: 18px 0 14px; }

@media (max-width: 900px) {
  .bi-grid { grid-template-columns: 1fr 1fr; }
  .bi-card--lead { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .bi-grid, .bi-sec-head, .bi-fields { grid-template-columns: 1fr; }
  .bi-src, .bi-impl li { grid-template-columns: 1fr; gap: 4px; }
  .bi-evidence { margin: 0 -16px; padding: 28px 16px; }
}
.bi-fields[hidden], .bi-form .btn[hidden] { display: none; }
.bi-osmod .fine-print, .bi-sec--note .fine-print { text-align: left; margin-left: 0; margin-right: 0; max-width: 72ch; }