/* DataVeritas — Bitblade Group */
@font-face { font-family: 'Space Grotesk'; src: url('../fonts/space-grotesk.woff2') format('woff2'); font-weight: 300 700; font-display: swap; }
@font-face { font-family: 'Hanken Grotesk'; src: url('../fonts/hanken-grotesk.woff2') format('woff2'); font-weight: 100 900; font-display: swap; }
@font-face { font-family: 'Space Mono'; src: url('../fonts/space-mono-400.woff2') format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'Space Mono'; src: url('../fonts/space-mono-700.woff2') format('woff2'); font-weight: 700; font-display: swap; }

:root {
  --bg: #0B0F1A; --bg2: #0E1422; --panel: #101728; --line: #1F2738; --line2: #1C2435; --line3: #243149;
  --blue: #2F80FF; --blue2: #6BA4FF; --amber: #F5A623; --red: #E5484D; --green: #3DD68C;
  --text: #FFFFFF; --soft: #A7AFBE; --muted: #7E8CA3; --faint: #5C6678; --dim: #3A4255;
  --display: 'Space Grotesk', system-ui, sans-serif; --body: 'Hanken Grotesk', system-ui, sans-serif; --mono: 'Space Mono', ui-monospace, monospace;
  --wrap: 1320px; --gutter: clamp(16px, 4vw, 56px); --radius: 10px;
  color-scheme: dark;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation-duration: .001s !important; animation-iteration-count: 1 !important; transition-duration: .001s !important; } }
body { margin: 0; background: var(--bg); color: var(--text); font-family: var(--body); font-size: 17px; line-height: 1.65; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; overflow-x: hidden; }
body::before { content: ''; position: fixed; inset: 0; pointer-events: none; z-index: 0; background: repeating-linear-gradient(-47deg, rgba(47,128,255,.035) 0, rgba(47,128,255,.035) 1px, transparent 1px, transparent 70px); }
main, header, footer { position: relative; z-index: 1; }
a { color: var(--blue); text-decoration: none; transition: color .2s; }
a:hover { color: var(--blue2); }
img, svg { max-width: 100%; }
h1, h2, h3, h4 { font-family: var(--display); font-weight: 700; letter-spacing: -0.02em; line-height: 1.1; margin: 0; text-wrap: balance; }
p { margin: 0; text-wrap: pretty; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 3px; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.skip { position: absolute; left: -9999px; top: 8px; background: var(--blue); color: var(--bg); padding: 8px 14px; z-index: 100; font-weight: 700; }
.skip:focus { left: 8px; }

/* ---------- header ---------- */
.site-head { position: sticky; top: 0; z-index: 50; background: rgba(11,15,26,.78); backdrop-filter: blur(14px) saturate(140%); -webkit-backdrop-filter: blur(14px) saturate(140%); border-bottom: 1px solid transparent; transition: border-color .3s; }
.site-head.scrolled { border-bottom-color: var(--line); }
.head-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--text); }
.brand:hover { color: var(--text); }
.brand svg { width: 24px; height: 24px; flex: none; }
.brand-name { font-family: var(--display); font-weight: 700; font-size: 19px; letter-spacing: -0.01em; }
.brand-name b { color: var(--blue); font-weight: 700; }
.brand-by { font-family: var(--mono); font-size: 10.5px; letter-spacing: .14em; color: var(--faint); text-transform: uppercase; padding-left: 12px; border-left: 1px solid var(--line3); }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a { font-family: var(--mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); padding: 8px 12px; border-radius: 4px; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); background: rgba(47,128,255,.08); }
.nav .lang { border: 1px solid var(--line3); margin-left: 8px; color: var(--soft); }
.nav .cta { background: var(--blue); color: var(--bg); font-weight: 700; margin-left: 6px; }
.nav .cta:hover { background: var(--blue2); color: var(--bg); }
.menu-btn { display: none; background: none; border: 1px solid var(--line3); color: var(--text); border-radius: 4px; width: 42px; height: 38px; cursor: pointer; }
.menu-btn span { display: block; width: 18px; height: 2px; background: currentColor; margin: 4px auto; transition: transform .25s, opacity .25s; }
@media (max-width: 900px) {
  .brand-by { display: none; }
  .menu-btn { display: block; }
  .nav { position: fixed; inset: 68px 0 auto 0; flex-direction: column; align-items: stretch; background: var(--bg); border-bottom: 1px solid var(--line); padding: 12px var(--gutter) 20px; gap: 2px; transform: translateY(-120%); transition: transform .3s ease; }
  .nav.open { transform: none; }
  .nav a { padding: 14px 12px; font-size: 13px; }
  .nav .lang, .nav .cta { margin: 8px 0 0; text-align: center; }
  .menu-open .menu-btn span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .menu-open .menu-btn span:nth-child(2) { opacity: 0; }
  .menu-open .menu-btn span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
}

/* ---------- common ---------- */
.eyebrow { display: flex; align-items: center; gap: 16px; font-family: var(--display); font-weight: 600; font-size: 14px; letter-spacing: .22em; text-transform: uppercase; color: var(--text); }
.eyebrow .no { font-family: var(--mono); font-size: 12px; font-weight: 700; color: var(--blue); border: 1px solid var(--blue); border-radius: 3px; padding: 4px 8px; letter-spacing: 0; }
.eyebrow .dash { width: 26px; height: 1px; background: var(--blue); }
.section { padding: clamp(72px, 10vw, 128px) 0; position: relative; scroll-margin-top: 20px; }
[id] { scroll-margin-top: 76px; }
.section + .section { border-top: 1px solid var(--line2); }
.section-head { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 48px; align-items: end; margin-bottom: 56px; }
.section-head h2 { font-size: clamp(34px, 4.6vw, 56px); margin-top: 26px; }
.section-head h2 .mute { color: var(--faint); }
.section-head .lede { font-size: 18px; color: var(--soft); max-width: 560px; }
@media (max-width: 860px) { .section-head { grid-template-columns: 1fr; gap: 20px; margin-bottom: 40px; } }
.accent-bar { width: 46px; height: 4px; background: var(--blue); }
.mono { font-family: var(--mono); }
.k { font-family: var(--mono); font-size: 11px; letter-spacing: .16em; color: var(--faint); text-transform: uppercase; }
.blue { color: var(--blue); } .red { color: var(--red); } .amber { color: var(--amber); } .white { color: #fff; }
.soft { color: var(--soft); } .muted { color: var(--muted); } .faint { color: var(--faint); } .dim { color: var(--dim); }
.btn { display: inline-flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: 12px; letter-spacing: .06em; text-transform: uppercase; border-radius: 3px; padding: 11px 16px; cursor: pointer; border: 1px solid var(--line3); background: transparent; color: var(--muted); transition: background .2s, border-color .2s, color .2s, transform .2s; text-decoration: none; line-height: 1.3; }
.btn:hover { border-color: var(--blue); color: var(--blue); }
.btn.solid { background: var(--blue); border-color: var(--blue); color: var(--bg); font-weight: 700; }
.btn.solid:hover { background: var(--blue2); border-color: var(--blue2); color: var(--bg); }
.btn.red { color: var(--red); border-color: rgba(229,72,77,.45); }
.btn.red:hover { background: rgba(229,72,77,.12); }
.btn.blue-o { color: var(--blue); border-color: rgba(47,128,255,.55); }
.btn.blue-o:hover { background: rgba(47,128,255,.12); }
.btn.disabled { color: var(--dim); cursor: default; }
.btn.disabled:hover { border-color: var(--line3); color: var(--dim); }
.btn.lg { font-size: 13px; padding: 15px 22px; }
.btn.sm { font-size: 11px; padding: 8px 12px; }
.btn .arr { transition: transform .2s; }
.btn:hover .arr { transform: translateX(4px); }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); }

/* ---------- hero ---------- */
.hero { padding: clamp(56px, 9vw, 110px) 0 clamp(56px, 8vw, 96px); position: relative; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 56px; align-items: center; }
.hero h1 { font-size: clamp(42px, 6.4vw, 84px); line-height: 1.02; letter-spacing: -0.035em; margin-top: 30px; }
.hero h1 .mute { color: var(--faint); display: block; }
.hero .lede { margin-top: 28px; font-size: clamp(17px, 1.6vw, 20px); color: var(--soft); max-width: 580px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 38px; }
.hero-tag { display: inline-flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); border: 1px solid var(--line3); border-radius: 100px; padding: 6px 14px 6px 8px; }
.hero-tag .pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 0 rgba(47,128,255,.6); animation: livepulse 2s infinite; }
@keyframes livepulse { 0% { box-shadow: 0 0 0 0 rgba(47,128,255,.6); } 70% { box-shadow: 0 0 0 10px rgba(47,128,255,0); } 100% { box-shadow: 0 0 0 0 rgba(47,128,255,0); } }
.hero-vis { position: relative; aspect-ratio: 1 / 1; border: 1px solid var(--line); border-radius: 14px; background: radial-gradient(ellipse at 50% 40%, rgba(47,128,255,.10), transparent 65%), var(--panel); overflow: hidden; }
.hero-vis canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-vis .vis-meta { position: absolute; left: 18px; right: 18px; bottom: 16px; display: flex; justify-content: space-between; gap: 12px; font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--faint); pointer-events: none; }
.hero-vis .vis-top { position: absolute; left: 18px; top: 16px; right: 18px; display: flex; justify-content: space-between; font-family: var(--mono); font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--faint); pointer-events: none; }
.hero-vis .vis-top b { color: var(--blue); font-weight: 400; }
.hero-strip { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: var(--radius); margin-top: clamp(48px, 7vw, 80px); overflow: hidden; background: rgba(16,23,40,.5); }
.hero-strip > div { padding: 22px 24px; border-right: 1px solid var(--line); }
.hero-strip > div:last-child { border-right: 0; }
.hero-strip .v { font-family: var(--display); font-size: clamp(26px, 3vw, 36px); font-weight: 700; letter-spacing: -0.02em; line-height: 1; margin-top: 10px; }
.hero-strip .s { font-size: 14px; color: var(--muted); margin-top: 8px; line-height: 1.5; }
@media (max-width: 960px) { .hero-grid { grid-template-columns: 1fr; } .hero-vis { aspect-ratio: 4 / 3; } }
@media (max-width: 760px) { .hero-strip { grid-template-columns: 1fr 1fr; } .hero-strip > div:nth-child(2) { border-right: 0; } .hero-strip > div:nth-child(-n+2) { border-bottom: 1px solid var(--line); } }

/* ---------- problem / idea ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }
.contrast { padding: 32px 34px; }
.contrast h3 { font-size: 24px; margin-top: 18px; }
.contrast ul { list-style: none; padding: 0; margin: 22px 0 0; display: flex; flex-direction: column; gap: 14px; }
.contrast li { display: grid; grid-template-columns: 22px 1fr; gap: 12px; color: var(--soft); font-size: 15.5px; line-height: 1.6; }
.contrast li::before { content: ''; width: 10px; height: 10px; margin-top: 8px; border-radius: 2px; }
.contrast.bad li::before { background: var(--red); opacity: .8; }
.contrast.good { border-color: rgba(47,128,255,.45); background: linear-gradient(180deg, rgba(47,128,255,.06), transparent 60%), var(--panel); }
.contrast.good li::before { background: var(--blue); }

.quote-band { margin-top: 56px; padding: clamp(28px, 4vw, 44px); border-left: 3px solid var(--blue); background: linear-gradient(90deg, rgba(47,128,255,.07), transparent); border-radius: 0 var(--radius) var(--radius) 0; }
.quote-band p { font-family: var(--display); font-size: clamp(22px, 2.6vw, 32px); font-weight: 600; letter-spacing: -0.015em; line-height: 1.3; }
.quote-band p em { font-style: normal; color: var(--blue); }

/* ALCOA+ */
.alcoa { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.alcoa > div { background: var(--bg); padding: 26px 26px 28px; transition: background .25s; }
.alcoa > div:hover { background: var(--panel); }
.alcoa .letter { font-family: var(--display); font-size: 40px; font-weight: 700; color: var(--blue); line-height: 1; }
.alcoa h3 { font-size: 18px; margin-top: 14px; }
.alcoa .req { font-size: 14px; color: var(--faint); margin-top: 6px; }
.alcoa .how { font-size: 15px; color: var(--soft); margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--line2); line-height: 1.6; }
@media (max-width: 960px) { .alcoa { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .alcoa { grid-template-columns: 1fr; } }
.note { font-size: 13.5px; color: var(--faint); margin-top: 20px; max-width: 900px; }

/* pipeline */
.pipeline { display: grid; grid-template-columns: repeat(5, 1fr); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; counter-reset: step; }
.pipeline > div { padding: 26px 22px 28px; border-right: 1px solid var(--line); position: relative; }
.pipeline > div:last-child { border-right: 0; }
.pipeline .code { font-family: var(--mono); font-size: 11px; letter-spacing: .12em; color: var(--blue); }
.pipeline h3 { font-size: 18px; margin-top: 14px; }
.pipeline p { font-size: 14.5px; color: var(--muted); margin-top: 10px; line-height: 1.6; }
.pipeline .glyph { height: 56px; margin-top: 22px; }
@media (max-width: 1000px) { .pipeline { grid-template-columns: 1fr 1fr; } .pipeline > div { border-bottom: 1px solid var(--line); } .pipeline > div:nth-child(2n) { border-right: 0; } }
@media (max-width: 600px) { .pipeline { grid-template-columns: 1fr; } .pipeline > div { border-right: 0; } }

/* roles */
.roles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.roles .panel { padding: 26px 24px; }
.roles .size { font-family: var(--display); font-size: 30px; font-weight: 700; margin-top: 16px; letter-spacing: -0.02em; }
.roles h3 { font-size: 18px; margin-top: 4px; }
.roles p { font-size: 14.5px; color: var(--muted); margin-top: 12px; }
.roles .who { font-family: var(--mono); font-size: 11px; color: var(--faint); margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line2); letter-spacing: .04em; }
@media (max-width: 1000px) { .roles { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .roles { grid-template-columns: 1fr; } }

/* use cases */
.cases { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.case { padding: 32px 34px; position: relative; overflow: hidden; }
.case .k { color: var(--blue); }
.case h3 { font-size: 24px; margin-top: 14px; }
.case p { color: var(--muted); margin-top: 12px; font-size: 15.5px; }
.case .ex { font-family: var(--mono); font-size: 12px; color: var(--soft); margin-top: 20px; padding: 12px 14px; border: 1px dashed var(--line3); border-radius: 6px; line-height: 1.7; }
@media (max-width: 760px) { .cases { grid-template-columns: 1fr; } }

/* teaser sim */
.sim-teaser { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 40px; align-items: center; padding: clamp(28px, 4vw, 48px); background: radial-gradient(ellipse at 90% 10%, rgba(47,128,255,.14), transparent 55%), var(--panel); }
.sim-teaser h2 { font-size: clamp(30px, 3.8vw, 46px); margin-top: 20px; }
.sim-teaser p { color: var(--soft); margin-top: 18px; }
.sim-teaser ul { margin: 22px 0 30px; padding: 0; list-style: none; display: grid; gap: 10px; font-family: var(--mono); font-size: 12.5px; color: var(--muted); }
.sim-teaser li::before { content: '→ '; color: var(--blue); }
@media (max-width: 900px) { .sim-teaser { grid-template-columns: 1fr; } }

/* blog cards */
.posts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.post-card { display: flex; flex-direction: column; padding: 28px 28px 26px; color: var(--text); transition: border-color .25s, transform .25s; }
.post-card:hover { border-color: var(--blue); color: var(--text); transform: translateY(-3px); }
.post-card .meta { display: flex; gap: 12px; flex-wrap: wrap; font-family: var(--mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--faint); }
.post-card h3 { font-size: 22px; margin-top: 18px; line-height: 1.2; }
.post-card p { color: var(--muted); font-size: 15px; margin-top: 12px; flex: 1; }
.post-card .more { font-family: var(--mono); font-size: 12px; color: var(--blue); margin-top: 22px; letter-spacing: .06em; text-transform: uppercase; }
.tag { display: inline-block; font-family: var(--mono); font-size: 10.5px; letter-spacing: .08em; color: var(--blue); border: 1px solid rgba(47,128,255,.35); border-radius: 3px; padding: 2px 7px; text-transform: lowercase; }
@media (max-width: 960px) { .posts { grid-template-columns: 1fr 1fr; } }
@media (max-width: 620px) { .posts { grid-template-columns: 1fr; } }
.empty { color: var(--muted); padding: 40px; text-align: center; border: 1px dashed var(--line3); border-radius: var(--radius); }

/* CTA */
.cta-band { text-align: center; padding: clamp(48px, 7vw, 88px) var(--gutter); border: 1px solid var(--line); border-radius: 14px; background: radial-gradient(ellipse at 50% 0%, rgba(47,128,255,.16), transparent 60%), var(--panel); }
.cta-band h2 { font-size: clamp(32px, 4.4vw, 54px); max-width: 860px; margin: 0 auto; }
.cta-band p { color: var(--soft); max-width: 640px; margin: 20px auto 0; font-size: 18px; }
.cta-band .hero-cta { justify-content: center; }

/* page head (subpages) */
.page-head { padding: clamp(48px, 8vw, 96px) 0 clamp(32px, 5vw, 56px); border-bottom: 1px solid var(--line2); }
.page-head h1 { font-size: clamp(38px, 5.6vw, 68px); margin-top: 26px; letter-spacing: -0.03em; }
.page-head h1 .mute { color: var(--faint); }
.page-head .lede { font-size: 19px; color: var(--soft); max-width: 760px; margin-top: 22px; }
.crumbs { font-family: var(--mono); font-size: 11.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--faint); display: flex; gap: 10px; flex-wrap: wrap; }
.crumbs a { color: var(--muted); }

/* prose (blog + legal) */
.prose { max-width: 740px; font-size: 18px; line-height: 1.75; color: #D5DAE3; }
.prose > * + * { margin-top: 1.1em; }
.prose h2 { font-size: 30px; margin-top: 2em; color: #fff; }
.prose h3 { font-size: 22px; margin-top: 1.7em; color: #fff; }
.prose h4 { font-size: 18px; margin-top: 1.5em; color: #fff; }
.prose a { text-decoration: underline; text-decoration-color: rgba(47,128,255,.4); text-underline-offset: 3px; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: .4em; }
.prose li::marker { color: var(--blue); }
.prose blockquote { margin-left: 0; padding: 4px 0 4px 22px; border-left: 3px solid var(--blue); color: var(--soft); font-style: italic; }
.prose code { font-family: var(--mono); font-size: .82em; background: var(--panel); border: 1px solid var(--line); border-radius: 4px; padding: 1px 6px; }
.prose pre { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 18px 20px; overflow-x: auto; font-size: 14px; line-height: 1.6; }
.prose pre code { background: none; border: 0; padding: 0; font-size: inherit; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2.4em 0; }
.prose img { border-radius: 8px; border: 1px solid var(--line); }
.prose table { width: 100%; border-collapse: collapse; font-size: 15px; display: block; overflow-x: auto; }
.prose th, .prose td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.prose th { font-family: var(--mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--faint); }
.post-layout { display: grid; grid-template-columns: minmax(0, 740px) minmax(0, 1fr); gap: 64px; padding: clamp(40px, 6vw, 72px) 0 clamp(64px, 8vw, 110px); }
.post-aside { position: sticky; top: 100px; align-self: start; display: flex; flex-direction: column; gap: 18px; font-size: 14px; color: var(--muted); }
.post-aside .panel { padding: 22px; }
@media (max-width: 1000px) { .post-layout { grid-template-columns: 1fr; } .post-aside { position: static; } }
.post-meta { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; margin-top: 24px; font-family: var(--mono); font-size: 12px; letter-spacing: .06em; color: var(--muted); }
.legal { padding: clamp(40px, 6vw, 72px) 0 clamp(64px, 8vw, 110px); }
.legal .prose { font-size: 16.5px; }
.legal address { font-style: normal; }
.legal .grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; max-width: 900px; }
.legal .grid2 .panel { padding: 24px 26px; font-size: 15.5px; line-height: 1.7; color: var(--soft); }
.legal .grid2 .panel strong { color: #fff; }
@media (max-width: 760px) { .legal .grid2 { grid-template-columns: 1fr; } }
.pager { display: flex; justify-content: space-between; gap: 12px; margin-top: 40px; }

/* ---------- footer ---------- */
.site-foot { border-top: 1px solid var(--line); margin-top: clamp(40px, 6vw, 80px); padding: 56px 0 40px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
.foot-grid h4 { font-family: var(--mono); font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--faint); font-weight: 400; }
.foot-grid ul { list-style: none; padding: 0; margin: 16px 0 0; display: grid; gap: 10px; font-size: 15px; }
.foot-grid ul a { color: var(--soft); }
.foot-grid ul a:hover { color: #fff; }
.foot-grid .about { color: var(--muted); font-size: 15px; margin-top: 16px; max-width: 360px; }
.foot-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--line2); font-family: var(--mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--faint); }
@media (max-width: 860px) { .foot-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .foot-grid { grid-template-columns: 1fr; } }

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

/* ============ SIMULATOR ============ */
@keyframes breathe { 0%,100% { transform: scale(1); } 50% { transform: scale(1.055); } }
@keyframes sweep { 0% { opacity: .3; } 50% { opacity: 1; } 100% { opacity: .3; } }
@keyframes packet { from { stroke-dashoffset: 100; } to { stroke-dashoffset: 0; } }
@keyframes ringpulse { 0%,100% { box-shadow: 0 0 0 2px #F5A623, 0 0 14px rgba(245,166,35,.35); } 50% { box-shadow: 0 0 0 3px #F5A623, 0 0 26px rgba(245,166,35,.6); } }
@keyframes sealer { 0%,100% { opacity: 1; } 50% { opacity: .55; } }
.sim-loading { padding: 80px 20px; text-align: center; color: var(--muted); font-family: var(--mono); font-size: 13px; border: 1px dashed var(--line3); border-radius: var(--radius); }
.sim { font-size: 15px; line-height: 1.6; }
.sim input[type=range] { -webkit-appearance: none; appearance: none; background: transparent; width: 100%; height: 22px; cursor: grab; margin: 6px 0 0; }
.sim input[type=range]::-webkit-slider-runnable-track { height: 3px; background: #1F2738; }
.sim input[type=range]::-moz-range-track { height: 3px; background: #1F2738; }
.sim input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; margin-top: -9px; border-radius: 2px; background: var(--blue); border: 3px solid var(--bg); box-shadow: 0 0 0 1px var(--blue), 0 0 16px rgba(47,128,255,.5); }
.sim input[type=range]::-moz-range-thumb { width: 14px; height: 14px; border-radius: 2px; background: var(--blue); border: 3px solid var(--bg); box-shadow: 0 0 0 1px var(--blue), 0 0 16px rgba(47,128,255,.5); }
.sim .row { display: flex; align-items: center; } .sim .row-b { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.sim .col { display: flex; flex-direction: column; } .sim .wrap { flex-wrap: wrap; padding: 0; max-width: none; margin: 0; } .sim .base { align-items: baseline; }
.sim .gap8 { gap: 8px; } .sim .gap10 { gap: 10px; } .sim .gap12 { gap: 12px; } .sim .gap16 { gap: 16px; } .sim .gap20 { gap: 20px; } .sim .gap22 { gap: 22px; } .sim .gap26 { gap: 26px; }
.sim .mt5 { margin-top: 5px; } .sim .mt6 { margin-top: 6px; } .sim .mt7 { margin-top: 7px; } .sim .mt8 { margin-top: 8px; } .sim .mt10 { margin-top: 10px; } .sim .mt12 { margin-top: 12px; } .sim .mt14 { margin-top: 14px; } .sim .mt16 { margin-top: 16px; } .sim .mt20 { margin-top: 20px; } .sim .mt22 { margin-top: 22px; } .sim .mt24 { margin-top: 24px; }
.sim .xxs { font-size: 10px; letter-spacing: .08em; } .sim .xs { font-size: 10.5px; } .sim .s { font-size: 11px; } .sim .sm { font-size: 12.5px; } .sim .up { text-transform: uppercase; letter-spacing: .08em; } .sim .nols { letter-spacing: 0; } .sim .r { text-align: right; } .sim .brk { word-break: break-word; line-height: 1.6; }
.sim .sep { margin-top: 14px; padding-top: 13px; border-top: 1px solid var(--line2); }
.sim .sep.big { margin-top: 22px; padding-top: 20px; }
.sim .btn-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.sim .btn-row.push { margin-top: auto; padding-top: 22px; }
.sim-card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(20px, 2.4vw, 30px) clamp(18px, 2.6vw, 32px); min-width: 0; }
.sim-grid-a { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 22px; margin-top: 22px; }
.sim-grid-b { display: grid; grid-template-columns: minmax(0, 1fr) 440px; gap: 22px; margin-top: 22px; }
.sim-grid-c { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-top: 22px; }
.sim-stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 22px; margin-top: 22px; }
.sim-phases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 22px; }
@media (max-width: 1180px) { .sim-grid-b { grid-template-columns: 1fr; } .sim-grid-b > .col { display: grid; grid-template-columns: 1fr 1fr; } }
@media (max-width: 980px) { .sim-grid-a, .sim-grid-c { grid-template-columns: 1fr; } .sim-stats { grid-template-columns: 1fr 1fr; } .sim-phases { grid-template-columns: 1fr; } }
@media (max-width: 760px) { .sim-grid-b > .col { grid-template-columns: 1fr; } }
@media (max-width: 520px) { .sim-stats { grid-template-columns: 1fr; } }
.sim .chip { font-family: var(--mono); font-size: 11px; background: transparent; color: var(--muted); border: 1px solid var(--line3); border-radius: 3px; padding: 6px 11px; cursor: pointer; transition: all .2s; }
.sim .chip:hover { border-color: var(--blue); color: var(--blue); }
.sim .chip.on { background: rgba(47,128,255,.12); border-color: var(--blue); color: var(--blue); }
.sim .presets { display: flex; gap: 7px; flex-wrap: wrap; }
.sim .bignum-row { display: flex; align-items: flex-end; gap: 14px; margin: 14px 0 16px; }
.sim .bignum { font-family: var(--display); font-size: clamp(48px, 6vw, 66px); font-weight: 700; line-height: 1; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
.sim .bignum-sub { font-size: 15px; color: var(--faint); padding-bottom: 10px; }
.sim .ticks { display: flex; justify-content: space-between; font-family: var(--mono); font-size: 10px; letter-spacing: .08em; color: var(--dim); margin-top: 2px; gap: 8px; }
.sim .churn { margin-top: 18px; padding: 18px 20px; border: 1px solid var(--line3); border-radius: 8px; }
.sim .churn-grid { display: grid; grid-template-columns: 1fr 1fr auto; gap: 20px; align-items: end; margin-top: 14px; }
.sim .churn-grid label { display: block; }
@media (max-width: 640px) { .sim .churn-grid { grid-template-columns: 1fr; } }
.sim .clock { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.sim .status { font-family: var(--mono); font-size: 11px; letter-spacing: .04em; color: var(--muted); margin-top: 14px; min-height: 18px; }
.sim .num22 { font-family: var(--display); font-size: 22px; font-weight: 700; font-variant-numeric: tabular-nums; }
.sim .bar { background: #1B2334; border-radius: 3px; overflow: hidden; }
.sim .bar > div { height: 100%; transition: width .25s linear, background .4s ease; }
.sim .h4 { height: 4px; } .sim .h5 { height: 5px; } .sim .h6 { height: 6px; }
.sim .histo { display: flex; align-items: flex-end; gap: 2px; height: 52px; margin-top: 18px; border-bottom: 1px solid var(--line2); }
.sim .histo > div { flex: 1; min-width: 0; transition: height .22s linear, background .3s ease; }
.sim .coverage-card { display: flex; flex-direction: column; justify-content: space-between; }
.sim .coverage-num { font-family: var(--display); font-size: 46px; font-weight: 700; line-height: 1.1; color: var(--blue); margin-top: 8px; }
.sim .coverage-bar { display: flex; gap: 2px; margin-top: 18px; }
.sim .coverage-bar > div { flex: 1; height: 28px; background: var(--blue); animation: sweep 2.6s ease-in-out infinite; }
.sim .coverage-text { margin-top: 22px; font-size: 14px; line-height: 1.65; color: var(--muted); }
.sim-stat { border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 26px; min-width: 0; }
.sim-stat .stat-v { font-family: var(--display); font-size: clamp(30px, 3vw, 40px); font-weight: 700; margin-top: 12px; line-height: 1; font-variant-numeric: tabular-nums; }
.sim-stat .stat-sub { font-size: 14px; color: var(--faint); margin-top: 10px; }
.sim-stat .foot-basis { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line2); line-height: 1.6; }
.sim .caption { margin: 12px 0 22px; font-size: 13px; line-height: 1.65; color: var(--faint); max-width: 760px; }
.sim .topo { position: relative; width: 100%; }
.sim .topo-svg { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; overflow: visible; }
.sim .topo-labels { position: absolute; inset: 0; pointer-events: none; z-index: 3; }
.sim .sim-plabel { position: absolute; transform: translate(-50%, -120%); font-family: var(--mono); font-size: 10px; text-shadow: 0 0 3px var(--bg), 0 0 3px var(--bg), 0 0 6px var(--bg); }
.sim .sim-node { position: absolute; border: 0; padding: 0; border-radius: 50%; cursor: crosshair; transition: background .7s cubic-bezier(.4,0,.2,1), transform .5s ease, opacity .5s ease, box-shadow .4s ease; }
.sim .sim-tip-wrap { position: absolute; z-index: 6; pointer-events: none; }
.sim .sim-tip { position: absolute; left: 0; background: var(--bg); border: 1px solid var(--blue); border-radius: 8px; padding: 16px 18px; box-shadow: 0 18px 40px rgba(0,0,0,.55); }
.sim .tip-name { font-family: var(--display); font-size: 14px; }
.sim .legend { display: flex; gap: 12px 24px; margin-top: 30px; padding-top: 20px; border-top: 1px solid var(--line2); font-family: var(--mono); font-size: 11px; letter-spacing: .04em; color: var(--muted); flex-wrap: wrap; }
.sim .legend span { display: flex; align-items: center; gap: 9px; }
.sim .legend i { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.sim .curve { width: 100%; height: auto; margin-top: 18px; overflow: visible; }
.sim .curve-t { fill: var(--dim); font-size: 9px; font-family: var(--mono); }
.sim .role-card { border: 1px solid var(--line3); border-radius: 8px; padding: 16px 18px; cursor: pointer; color: #C2C9D6; transition: border-color .25s, background .25s, color .25s; }
.sim .role-card:hover { border-color: #3a5a8f; }
.sim .role-card.active { border-color: var(--blue); background: rgba(47,128,255,.07); color: #fff; }
.sim .role-title { font-family: var(--display); font-size: 19px; }
.sim .role-size { font-family: var(--display); font-size: 20px; font-variant-numeric: tabular-nums; }
.sim .role-text { font-size: 14px; color: var(--muted); margin-top: 8px; line-height: 1.6; }
.sim .ledger-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(320px, 100%), 1fr)); gap: 14px; margin-top: 22px; }
.sim .ledger-card { border: 1px solid var(--line2); border-radius: 8px; padding: 18px 20px; }
.sim .ledger-card.changed { border-color: rgba(245,166,35,.4); background: rgba(245,166,35,.05); }
.sim .ledger-name { font-family: var(--display); font-size: 15px; }
.sim .ledger-hint { margin: 18px 0 0; max-width: 760px; font-size: 14.5px; line-height: 1.7; color: var(--muted); }
.sim .phase { border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 30px; }
.sim .phase h3 { margin-top: 16px; font-size: 24px; }
.sim .phase p { margin-top: 12px; font-size: 15px; line-height: 1.65; color: var(--muted); }
.sim .body-text { margin-top: 16px; font-size: 14.5px; line-height: 1.7; color: var(--soft); }
.sim .body-text.wide { max-width: 900px; }
.sim .authority { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 11px 14px; border-radius: 6px; border: 1px solid var(--line2); color: var(--soft); transition: all .35s ease; font-size: 14.5px; }
.sim .authority.active { border-color: var(--blue); background: rgba(47,128,255,.08); color: #fff; }
.sim .adot { width: 8px; height: 8px; border-radius: 2px; background: var(--dim); display: inline-block; flex: none; }
.sim .authority.active .adot { background: var(--blue); animation: sealer 1.2s ease-in-out infinite; }
.sim .tamper-box { border: 1px solid var(--line); border-radius: 8px; padding: 20px 22px; margin-top: 22px; }
.sim .tamper-msg { margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line2); font-size: 14px; line-height: 1.6; color: var(--soft); min-height: 44px; }
.sim .log-table { margin-top: 20px; display: flex; flex-direction: column; gap: 6px; }
.sim .log-head, .sim .log-row { display: grid; grid-template-columns: 92px minmax(0, 1fr) 170px 150px; gap: 14px; align-items: baseline; }
.sim .log-head { padding: 0 15px 2px; font-family: var(--mono); font-size: 10px; letter-spacing: .12em; text-transform: uppercase; color: var(--dim); }
.sim .log-row { padding: 12px 15px; border-radius: 6px; cursor: pointer; border: 1px solid var(--line2); background: transparent; color: inherit; text-align: left; font-family: var(--mono); font-size: 11.5px; transition: border-color .25s, background .25s; }
.sim .log-row:hover { border-color: #2a3a57; }
.sim .log-row.active { border-color: var(--blue); background: rgba(47,128,255,.08); }
.sim .log-row.bad { border-color: rgba(229,72,77,.4); background: rgba(229,72,77,.06); }
.sim .log-row .hash { font-size: 11px; white-space: pre; overflow: hidden; text-overflow: ellipsis; }
.sim .log-row .sealer { font-size: 10.5px; color: var(--faint); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sim .log-row .r { font-size: 10.5px; }
@media (max-width: 760px) { .sim .log-head span:nth-child(3), .sim .log-row .sealer { display: none; } .sim .log-head, .sim .log-row { grid-template-columns: 78px minmax(0, 1fr) 118px; } }
.sim .vstep { display: grid; grid-template-columns: 54px minmax(0, 1fr) 96px; gap: 16px; align-items: baseline; padding: 13px 16px; border-radius: 6px; border: 1px solid var(--line2); transition: all .3s ease; }
.sim .vstep.done { border-color: rgba(47,128,255,.35); background: rgba(47,128,255,.05); }
.sim .vstep.active { border-color: rgba(47,128,255,.35); background: rgba(245,166,35,.07); }
.sim .vstep.failed { border-color: rgba(229,72,77,.5); background: rgba(229,72,77,.08); }
.sim .vtitle { font-family: var(--display); font-weight: 700; font-size: 15px; color: var(--muted); }
.sim .vdetail { margin: 5px 0 0; font-size: 13px; line-height: 1.6; color: var(--faint); }
.sim .vstep.done .vtitle, .sim .vstep.active .vtitle, .sim .vstep.failed .vtitle { color: #fff; }
.sim .vstep.done .vdetail, .sim .vstep.active .vdetail, .sim .vstep.failed .vdetail { color: var(--soft); }
@media (max-width: 560px) { .sim .vstep { grid-template-columns: 34px minmax(0, 1fr); } .sim .vstep > :last-child { grid-column: 2; text-align: left; } }
.sim .verdict { flex: 1; min-width: min(280px, 100%); font-size: 14px; line-height: 1.6; }
/* parameters */
.sim-params { border: 1px solid rgba(47,128,255,.35); border-radius: var(--radius); background: linear-gradient(180deg, rgba(47,128,255,.06), transparent 70%), var(--panel); }
.sim .params-toggle { width: 100%; display: flex; justify-content: space-between; align-items: center; background: none; border: 0; padding: 18px clamp(18px, 2.6vw, 32px); cursor: pointer; color: inherit; }
.sim .params-body { padding: 0 clamp(18px, 2.6vw, 32px) 24px; }
.sim .params-hint { font-size: 14px; color: var(--muted); max-width: 760px; }
.sim .params-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px 28px; margin: 20px 0 18px; }
@media (max-width: 1100px) { .sim .params-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .sim .params-grid { grid-template-columns: 1fr; } }
.sim .param { display: block; }
.sim .param-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; font-family: var(--mono); font-size: 11px; color: var(--muted); }
.sim .param-val { display: inline-flex; align-items: center; gap: 6px; }
.sim .param-val input { width: 84px; background: var(--bg); border: 1px solid var(--line3); border-radius: 3px; color: #fff; font-family: var(--mono); font-size: 12px; padding: 4px 6px; text-align: right; }
.sim .param-val input:focus { border-color: var(--blue); outline: none; }
.sim .param-val .unit { color: var(--faint); min-width: 36px; font-size: 10.5px; }

/* ---------- ultrawide: simulator as a dashboard ---------- */
.wrap.wide { max-width: 2560px; }
/* ultrawide: every page uses the full viewport width */
@media (min-width: 1900px) {
  :root { --wrap: none; --gutter: clamp(56px, 3vw, 120px); }
  .wrap, .wrap.wide { max-width: none; }
  .hero h1 { font-size: clamp(72px, 4.2vw, 128px); }
  .hero .lede, .page-head .lede, .section-head .lede { max-width: 820px; }
  .hero-vis { aspect-ratio: 16 / 10; max-height: 72vh; }
  .posts { grid-template-columns: repeat(auto-fill, minmax(420px, 1fr)); }
  .cases { grid-template-columns: repeat(auto-fit, minmax(560px, 1fr)); }
  .post-layout { grid-template-columns: minmax(0, 820px) minmax(320px, 420px); justify-content: space-between; }
}
@media (min-width: 1900px) {
  .sim {
    display: grid; gap: 22px;
    grid-template-columns: minmax(360px, 420px) minmax(0, 1fr) minmax(0, 1fr) minmax(400px, 480px);
    grid-template-areas:
      "params    params  params  params"
      "left      topo    topo    side"
      "stats     stats   stats   stats"
      "ledger    ledger  ledger  ledger"
      "phases    phases  phases  phases"
      "consensus tamper  log     log"
      "verify    verify  log     log";
    align-items: start;
  }
  .sim > * { margin-top: 0 !important; }
  .sim .sim-grid-b, .sim .sim-grid-c { display: contents; }
  .sim .sim-grid-a { grid-area: left; display: flex; flex-direction: column; gap: 22px; }
  .sim .sim-grid-b > .col { grid-area: side; }
  .sim .a-params { grid-area: params; }
  .sim .a-topo { grid-area: topo; align-self: stretch; display: flex; flex-direction: column; }
  .sim .a-topo .legend { margin-top: auto; }
  .sim .a-topo .topo { flex: 1 1 auto; min-height: 380px; margin-bottom: 30px; }
  .sim .a-stats { grid-area: stats; } .sim .a-ledger { grid-area: ledger; } .sim .a-phases { grid-area: phases; }
  .sim .a-consensus { grid-area: consensus; align-self: stretch; } .sim .a-tamper { grid-area: tamper; align-self: stretch; }
  .sim .a-log { grid-area: log; align-self: stretch; } .sim .a-verify { grid-area: verify; align-self: stretch; }
  .sim .params-grid { grid-template-columns: repeat(8, minmax(0, 1fr)); }
  .sim .coverage-card { justify-content: flex-start; }
  .sim .coverage-text { margin-top: 18px; }
  .sim .ledger-grid { grid-template-columns: repeat(auto-fill, minmax(360px, 1fr)); }
  .sim .log-head, .sim .log-row { grid-template-columns: 110px minmax(0, 1fr) 220px 170px; }
  .sim .log-row { padding: 14px 18px; font-size: 12.5px; }
  .sim .log-row .hash { font-size: 12px; }
}
@media (min-width: 2400px) {
  .sim { grid-template-columns: 440px minmax(0, 1fr) minmax(0, 1fr) 500px; }
  .sim .bignum { font-size: 76px; }
}
/* very wide + tall (e.g. 5000×2500): tighter vertical rhythm, log beside the topology */
@media (min-width: 3000px) {
  .section { padding: 88px 0; }
  .section-head { margin-bottom: 40px; }
  .hero { padding: 56px 0 64px; }
  .hero-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); gap: 80px; }
  .hero-vis { max-height: 60vh; aspect-ratio: 2 / 1; }
  .hero-strip { margin-top: 48px; }
  .page-head { padding: 48px 0 36px; }
  .sim {
    gap: 18px;
    grid-template-columns: 460px minmax(0, 1.35fr) 520px minmax(0, 1fr);
    grid-template-areas:
      "params    params  params  params"
      "left      topo    side    log"
      "stats     stats   stats   stats"
      "ledger    ledger  phases  phases"
      "consensus tamper  verify  verify";
  }
  .sim .sim-grid-a { gap: 18px; }
  .sim .a-log { align-self: stretch; }
  .sim .a-topo .topo { margin-bottom: 20px; }
  .sim .a-phases { align-self: stretch; }
  .sim .a-ledger { align-self: stretch; }
}

/* 5K ultrawide (≥3600×1400): the whole simulator fits into one viewport */
@media (min-width: 3600px) and (min-height: 1400px) {
  .sim-head { padding: 22px 0 18px; }
  .sim-head .wrap { display: grid; grid-template-columns: auto minmax(0, 1fr); column-gap: 64px; align-items: end; }
  .sim-head h1 { font-size: 46px; margin-top: 12px; grid-column: 1; }
  .sim-head .eyebrow { grid-column: 1; }
  .sim-head .lede { grid-column: 2; grid-row: 1 / span 2; margin: 0; max-width: 1100px; font-size: 17px; }
  .sim-head .hero-strip { display: none; }
  .sim-section { padding: 16px 0 0 !important; }
  .sim-section .note { display: none; }
  .sim {
    height: calc(100dvh - var(--sim-top, 230px) - 18px); min-height: 1150px;
    grid-template-columns: 420px minmax(0, 1.35fr) 460px minmax(0, 1fr) minmax(0, 1fr);
    grid-template-rows: auto minmax(0, 1fr) auto auto auto;
    grid-template-areas:
      "params params params params params"
      "left   topo   side   log    consensus"
      "left   stats  side   log    verify"
      "left   ledger side   tamper verify"
      "left   phases side   tamper verify";
    align-items: stretch; gap: 16px;
  }
  .sim > *, .sim .sim-grid-a, .sim .sim-grid-b > .col { min-height: 0; }
  .sim .sim-grid-a, .sim .sim-grid-b > .col { gap: 16px; overflow: auto; scrollbar-width: thin; }
  .sim .a-log, .sim .a-verify, .sim .a-consensus, .sim .a-tamper { overflow: auto; scrollbar-width: thin; }
  .sim .a-topo .topo { min-height: 0; }
  .sim .sim-card { padding: 20px 24px; }
  .sim .a-params { padding-top: 14px; padding-bottom: 14px; }
  .sim .sim-stat { padding-top: 16px; padding-bottom: 16px; }
  .sim .legend { margin-top: 12px; padding-top: 12px; }
  .sim .caption { margin: 8px 0 12px; }
  .sim .log-head, .sim .log-row { grid-template-columns: 96px minmax(0, 1fr) 180px 140px; }
  .sim .log-row { padding: 10px 14px; }
}