.brief-page { background: radial-gradient(920px 520px at 80% 6%, rgba(118,232,194,.13), transparent 66%), radial-gradient(720px 480px at 12% 16%, rgba(118,185,0,.13), transparent 70%), var(--ink); }
.brief-nav { background: rgba(5,8,5,.9); }
.brief-links { display: flex; gap: 24px; margin-inline-start: auto; }
.brief-links a { color: var(--dim); font-size: 12px; font-weight: 700; }
.brief-links a:hover { color: var(--text); }
.brief-hero { padding-block: clamp(88px, 13vw, 172px) clamp(76px, 10vw, 128px); overflow: hidden; }
.brief-kicker { display: inline-flex; align-items: center; gap: 10px; padding: 8px 12px; border: 1px solid rgba(118,232,194,.2); border-radius: 999px; color: var(--mint); background: rgba(118,232,194,.04); font: 700 10px "IBM Plex Mono", monospace; letter-spacing: .12em; text-transform: uppercase; }
.brief-hero-grid { display: grid; grid-template-columns: minmax(0,1.18fr) minmax(300px,.72fr); gap: clamp(40px,8vw,130px); align-items: center; margin-block-start: 32px; }
.brief-logo { width: min(344px,90%); margin-block-end: 28px; }
.brief-hero h1 { max-width: 860px; margin-block: 0 24px; font-size: clamp(48px,7.1vw,92px); }
.brief-lead { max-width: 720px; color: var(--dim); font-size: clamp(18px,2vw,23px); line-height: 1.65; }
.brief-hero-panel { min-height: 450px; padding: clamp(28px,4vw,48px); display: flex; flex-direction: column; justify-content: flex-end; position: relative; overflow: hidden; border: 1px solid rgba(118,232,194,.27); border-radius: 28px; background: radial-gradient(circle at 60% 30%, rgba(182,255,61,.19), transparent 26%), linear-gradient(150deg, rgba(13,26,16,.96), rgba(5,9,6,.96)); box-shadow: 0 36px 110px -60px rgba(118,232,194,.65); }
.brief-hero-panel::before { content: ""; position: absolute; width: 370px; aspect-ratio: 1; inset: 20px -100px auto auto; border: 1px solid rgba(118,232,194,.14); border-radius: 50%; box-shadow: 0 0 0 40px rgba(118,232,194,.025), 0 0 0 80px rgba(118,232,194,.018); }
.brief-mark { width: 104px; margin-block-end: auto; position: relative; z-index: 1; filter: drop-shadow(0 0 18px rgba(118,232,194,.35)); }
.brief-hero-panel > span, .brief-flow-card > span, .brief-model-contrast span, .brief-model-stack span, .brief-eval > span, .factory-track span, .brief-layered-stack span { color: var(--mint); font: 700 9px/1.4 "IBM Plex Mono", monospace; letter-spacing: .11em; }
.brief-hero-panel strong { max-width: 300px; margin-block: 14px 10px; position: relative; font-size: clamp(25px,3vw,37px); line-height: 1.1; letter-spacing: -.04em; }
.brief-hero-panel p { margin: 0; position: relative; color: var(--dim); font-size: 13px; }
.signal-row { display: flex; flex-wrap: wrap; gap: 7px; margin-block-start: 26px; position: relative; }
.signal-row i { padding: 7px 9px; border: 1px solid var(--line); border-radius: 8px; color: var(--dim); background: rgba(5,8,5,.65); font: normal 700 9px "IBM Plex Mono", monospace; }
.brief-section { padding-block: clamp(74px,10vw,132px); }
.brief-two-col { display: grid; grid-template-columns: minmax(0,1.03fr) minmax(280px,.77fr); gap: clamp(30px,8vw,110px); align-items: start; }
.brief-two-col h2, .brief-heading h2 { margin-block: 12px 0; }
.brief-two-col p, .brief-heading > p, .brief-partner > .container > p { color: var(--dim); font-size: 16px; }
.brief-principle { border-block: 1px solid var(--line); background: rgba(8,13,8,.4); }
.brief-system { overflow: hidden; }
.brief-heading { max-width: 820px; }
.brief-heading > p { max-width: 660px; }
.brief-flow { display: grid; grid-template-columns: minmax(165px,.9fr) 30px minmax(165px,.86fr) 30px minmax(165px,1.12fr) 30px minmax(165px,.9fr); align-items: stretch; gap: 8px; margin-block-start: 48px; }
.brief-flow-card { min-height: 242px; padding: 23px; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 18px; background: rgba(10,16,10,.75); }
.brief-flow-card strong { margin-block: auto 12px; font-size: 16px; line-height: 1.3; }
.brief-flow-card small { color: var(--muted); font-size: 10px; line-height: 1.5; }
.brief-flow-card.mesh { border-color: rgba(182,255,61,.4); background: radial-gradient(circle at 50% 20%, rgba(182,255,61,.16), rgba(9,15,9,.92) 70%); }
.brief-flow-card.mesh img { width: 54px; margin-block-end: 15px; }
.brief-flow-card.coach { border-color: rgba(118,232,194,.38); background: linear-gradient(155deg, rgba(118,232,194,.12), rgba(9,15,9,.91)); }
.brief-flow-arrow { align-self: center; color: var(--lime); font-size: 22px; text-align: center; }
.brief-archify { margin-block-start: 34px; overflow: hidden; border: 1px solid rgba(118,232,194,.24); border-radius: 20px; background: #070b18; box-shadow: 0 34px 100px -55px rgba(118,232,194,.5); }
.brief-archify iframe { display: block; width: 100%; height: 900px; border: 0; background: #070b18; }
.brief-capabilities { border-block-start: 1px solid var(--line); }
.brief-capability-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1px; margin-block-start: 42px; border: 1px solid var(--line); border-radius: 20px; overflow: hidden; background: var(--line); }
.brief-capability-grid article { min-height: 250px; padding: 24px; background: rgba(8,13,8,.92); }
.brief-capability-grid span { color: var(--mint); font: 700 10px "IBM Plex Mono", monospace; }
.brief-capability-grid h3 { margin-block: 42px 10px; font-size: 20px; }
.brief-capability-grid p { margin: 0; color: var(--muted); font-size: 12px; }
.brief-model { border-block: 1px solid var(--line); background: radial-gradient(700px 520px at 84% 45%, rgba(118,185,0,.1), transparent 70%), rgba(8,13,8,.48); }
.brief-model-head p + p { margin-block-start: 18px; }
.brief-model-contrast { display: grid; grid-template-columns: 1fr 1.12fr; gap: 14px; margin-block-start: 50px; }
.brief-model-contrast article { min-height: 220px; padding: 28px; border: 1px solid var(--line); border-radius: 18px; background: rgba(7,12,8,.78); }
.brief-model-contrast article.active { border-color: rgba(182,255,61,.4); background: linear-gradient(135deg, rgba(182,255,61,.14), rgba(8,14,8,.9) 56%); }
.brief-model-contrast strong { display: block; max-width: 460px; margin-block: 30px 12px; font-size: 25px; line-height: 1.2; letter-spacing: -.035em; }
.brief-model-contrast p { margin: 0; color: var(--muted); font-size: 13px; }
.brief-model-stack { display: grid; grid-template-columns: minmax(0,1fr) 18px minmax(0,1fr) 18px minmax(0,1fr) 18px minmax(0,1.16fr); gap: 8px; align-items: stretch; margin-block-start: 16px; }
.brief-model-stack > div { min-height: 176px; padding: 19px; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 15px; background: rgba(7,12,8,.76); }
.brief-model-stack strong { margin-block: auto 9px; font-size: 14px; line-height: 1.3; }
.brief-model-stack small { color: var(--muted); font-size: 10px; line-height: 1.5; }
.brief-model-stack b { align-self: center; color: var(--mint); font: 600 15px "IBM Plex Mono", monospace; }
.brief-model-stack .result { border-color: rgba(182,255,61,.42); background: radial-gradient(circle at 50% 0, rgba(182,255,61,.14), rgba(8,14,8,.9) 70%); }
.brief-factory { border-block-end: 1px solid var(--line); }
.brief-factory .brief-heading > p { max-width: 860px; margin-block-start: 30px; font-size: clamp(18px,1.55vw,21px); line-height: 1.55; }
.brief-factory-grid { display: grid; grid-template-columns: minmax(0,1.35fr) minmax(270px,.65fr); gap: 32px; margin-block-start: 45px; }
.factory-track { display: grid; grid-template-columns: repeat(5,1fr); gap: 1px; border: 1px solid var(--line); border-radius: 18px; overflow: hidden; background: var(--line); }
.factory-track > div { min-height: 260px; padding: 22px; display: grid; grid-template-rows: auto 1fr auto minmax(84px,auto); background: rgba(8,13,8,.92); }
.factory-track span { font-size: 10px; }
.factory-track strong { margin-block: 0 11px; font-size: clamp(18px,1.35vw,21px); line-height: 1.28; }
.factory-track small { color: var(--muted); font-size: 12px; line-height: 1.55; }
.brief-eval { padding: 30px; border: 1px solid rgba(118,232,194,.24); border-radius: 18px; background: linear-gradient(145deg, rgba(13,24,15,.9), rgba(7,12,8,.9)); }
.brief-eval > span { font-size: 10px; }
.brief-eval > div { display: grid; grid-template-columns: repeat(2,1fr); gap: 10px; margin-block: 26px; }
.brief-eval i { padding: 12px; border: 1px solid var(--line); border-radius: 8px; color: var(--dim); font: normal 600 11px/1.4 "IBM Plex Mono", monospace; }
.brief-eval p { margin: 0; padding-inline-start: 16px; border-inline-start: 1px solid var(--lime); color: var(--muted); font-size: 13px; line-height: 1.5; }
.brief-control { background: radial-gradient(600px 460px at 10% 50%, rgba(118,232,194,.07), transparent 70%); }
.brief-control-grid { display: grid; grid-template-columns: minmax(0,1fr) minmax(310px,.82fr); gap: clamp(38px,9vw,130px); align-items: center; }
.brief-control-grid p { color: var(--dim); }
.brief-layered-stack { display: grid; justify-items: center; }
.brief-layered-stack div { width: var(--brief-layer-width,100%); padding: 19px 22px; border: 1px solid var(--line); text-align: center; background: rgba(8,14,8,.92); }
.brief-layered-stack div:first-child { --brief-layer-width: 75%; border-radius: 16px 16px 0 0; border-color: rgba(182,255,61,.42); }
.brief-layered-stack div:nth-child(2) { --brief-layer-width: 87%; }
.brief-layered-stack div:last-child { border-radius: 0 0 16px 16px; }
.brief-layered-stack strong { display: block; margin-block-start: 6px; color: var(--dim); font-size: 12px; }
.brief-partner { padding-block: clamp(78px,12vw,158px); text-align: center; }
.brief-partner h2, .brief-partner > .container > p { margin-inline: auto; }
.brief-partner > .container > p { max-width: 720px; }
.brief-partner .hero-actions { justify-content: center; }

@media (max-width: 1100px) {
  .brief-flow { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .brief-flow-arrow { display: none; }
  .brief-capability-grid { grid-template-columns: repeat(2,1fr); }
  .brief-factory-grid { grid-template-columns: 1fr; }
}
@media (max-width: 820px) {
  .brief-links { display: none; }
  .brief-nav .nav-cta { margin-inline-start: auto; }
  .brief-hero-grid, .brief-two-col, .brief-control-grid { grid-template-columns: 1fr; }
  .brief-hero-panel { min-height: 340px; }
  .brief-model-contrast { grid-template-columns: 1fr; }
  .brief-model-stack { grid-template-columns: 1fr; }
  .brief-model-stack b { height: 18px; }
  .factory-track { grid-template-columns: repeat(2,1fr); }
 .factory-track > div { min-height: 190px; }
}
@media (max-width: 560px) {
  .brief-archify { margin-block-start: 22px; border-radius: 15px; }
  .brief-archify iframe { height: 760px; }
  .brief-nav .nav-cta { display: none; }
  .brief-hero { padding-block-start: 68px; }
  .brief-hero-panel { min-height: 300px; }
  .brief-flow, .brief-capability-grid, .factory-track, .brief-eval > div { grid-template-columns: 1fr; }
  .brief-flow-card { min-height: 180px; }
  .brief-capability-grid article { min-height: 180px; }
  .brief-capability-grid h3 { margin-block: 28px 9px; }
  .brief-model-stack > div { min-height: 145px; }
  .brief-layered-stack div, .brief-layered-stack div:first-child, .brief-layered-stack div:nth-child(2) { width: 100%; }
}