:root {
  color-scheme: light;
  --blue: #08559B; --navy: #003388; --night: #0B1B36;
  --sky: #378BD8; --amber: #F3B22A; --green: #48B379; --red: #C62828;
  --ground: #F6F8FA; --surface: #FFFFFF; --ink: #1F2429; --ink-2: #555C63; --ink-3: #6F7881;
  --line: #E3E7EB; --tint: #EAF2FA;
  --logo-die: #FFFFFF; --logo-a: #08559B; --logo-word: #FFFFFF; --logo-for: #A9C3E0;
  --sans: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --gutter: clamp(16px, 4vw, 40px);
  --shadow: 0 1px 2px rgba(11,27,54,.06), 0 12px 32px -8px rgba(11,27,54,.14);
  --shadow-lg: 0 2px 4px rgba(0,0,0,.12), 0 32px 64px -16px rgba(0,0,0,.45);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--surface); color: var(--ink); font: 400 17px/1.65 var(--sans); }
h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: -0.02em; line-height: 1.15; text-wrap: balance; }
p { margin: 0; }
a { color: var(--blue); text-underline-offset: 3px; }
code { font: 500 .86em var(--mono); }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--sky); outline-offset: 3px; border-radius: 4px; }
.wrap { max-width: 1200px; margin: 0 auto; padding-inline: var(--gutter); }
.t { font: 500 .84em var(--mono); background: var(--tint); color: var(--navy); padding: .06em .4em; border-radius: 4px; white-space: nowrap; }

.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 8px; font: 600 16px var(--sans); text-decoration: none; border: 1px solid transparent; transition: background-color .15s, border-color .15s; }
.btn-light { background: #FFFFFF; color: var(--navy); }
.btn-light:hover { background: #E6EEF7; }
.btn-line { color: #FFFFFF; border-color: rgba(255,255,255,.32); }
.btn-line:hover { border-color: #FFFFFF; }

/* ---------- hero ---------- */
.hero { background: var(--night); color: #FFFFFF; position: relative; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; pointer-events: none; background:
  radial-gradient(900px 520px at 78% 38%, rgba(55,139,216,.28), transparent 70%),
  repeating-linear-gradient(180deg, rgba(255,255,255,.025) 0 1px, transparent 1px 8px); }
.hero > * { position: relative; }
.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 22px; }
.top .logo { width: 176px; height: auto; display: block; }
.top nav { display: flex; gap: 4px; align-items: center; }
.top nav a:not(.btn) { padding: 10px 14px; font-weight: 500; font-size: 15px; color: #C8D6E8; text-decoration: none; border-radius: 6px; }
.top nav a:not(.btn):hover { color: #FFFFFF; }
.top nav .lang { color: #FFFFFF; font-weight: 600; }
.lang .short { display: none; }
.top .btn { min-height: 40px; padding: 0 16px; font-size: 15px; margin-left: 8px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 56px; align-items: center; padding-block: 56px 120px; }
.kicker { display: inline-flex; align-items: center; gap: 10px; font-size: 14px; font-weight: 500; color: #C8D6E8; border: 1px solid rgba(255,255,255,.16); border-radius: 999px; padding: 6px 14px 6px 8px; }
.kicker b { background: var(--amber); color: var(--ink); font-size: 12px; font-weight: 700; border-radius: 999px; padding: 2px 8px; }
.hero h1 { font-size: clamp(36px, 4.6vw, 58px); letter-spacing: -0.03em; line-height: 1.08; margin-top: 22px; }
.hero .lede { margin-top: 22px; font-size: 19px; color: #C8D6E8; max-width: 34em; }
.hero .cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.modules { margin-top: 40px; display: grid; gap: 10px; }
.modules p { font-size: 14px; color: #8FA6C3; }
.modules ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.modules li { font-size: 14px; font-weight: 600; padding: 5px 12px; border-radius: 6px; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.1); }

/* product frame */
.frame { background: #FFFFFF; color: var(--ink); border-radius: 14px; box-shadow: var(--shadow-lg); overflow: hidden; border: 1px solid rgba(255,255,255,.12); }
.chrome { display: flex; align-items: center; gap: 7px; padding: 11px 14px; background: #EEF1F4; border-bottom: 1px solid var(--line); }
.chrome i { width: 11px; height: 11px; border-radius: 50%; background: #D3D8DE; }
.chrome span { margin-left: 14px; flex: 1; max-width: 340px; font-size: 12.5px; color: var(--ink-3); background: #FFFFFF; border-radius: 6px; padding: 4px 12px; }
.app { display: grid; grid-template-columns: 196px minmax(0, 1fr); height: 560px; }
.rail { background: var(--blue); color: #FFFFFF; padding: 16px 12px; display: flex; flex-direction: column; gap: 14px; font-size: 13px; }
.rail .brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 15px; padding: 0 4px; }
.rail .brand svg { width: 26px; height: 26px; }
.rail .brand span { font-weight: 400; color: #CFDDEC; }
.rail .r-btn { border-radius: 6px; padding: 8px 10px; font-weight: 600; }
.rail .r-btn.solid { background: #FFFFFF; color: var(--blue); }
.rail .r-btn.out { border: 1px solid rgba(255,255,255,.4); }
.rail h4 { margin: 4px 4px 0; font-size: 11.5px; font-weight: 500; color: #CFDDEC; }
.rail .r-item { padding: 6px 8px; border-radius: 5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: #E6EEF7; }
.rail .r-item.on { background: rgba(255,255,255,.16); color: #FFFFFF; font-weight: 600; }
.rail .r-nav { margin-top: auto; border-top: 1px solid rgba(255,255,255,.18); padding-top: 10px; display: grid; gap: 2px; }
.rail .r-nav div { padding: 6px 8px; color: #E6EEF7; display: flex; justify-content: space-between; }
.rail .r-nav em { font-style: normal; background: var(--amber); color: var(--ink); border-radius: 999px; font-size: 11px; font-weight: 700; padding: 0 7px; }
.chat { background: var(--ground); padding: 20px 22px; display: flex; flex-direction: column; gap: 14px; overflow: hidden; font-size: 14px; line-height: 1.6; }
.chat .q { align-self: flex-end; background: var(--blue); color: #FFFFFF; padding: 10px 14px; border-radius: 14px 14px 4px 14px; max-width: 82%; }
.chat .q .t { background: rgba(255,255,255,.18); color: #FFFFFF; }
.ans { background: #FFFFFF; border: 1px solid var(--line); border-radius: 4px 14px 14px 14px; padding: 16px 18px; display: grid; gap: 10px; align-content: start; }
.ans h3 { font-size: 15px; letter-spacing: 0; }
.status { font-size: 13px; color: var(--ink-3); display: flex; align-items: center; gap: 8px; }
.status::before { content: ""; width: 12px; height: 6px; border-radius: 1px; background: var(--amber); animation: heat 1s ease-in-out infinite alternate; }
@keyframes heat { from { opacity: .3; } to { opacity: 1; } }
.steps { margin: 0; padding: 0; list-style: none; counter-reset: s; display: grid; gap: 7px; }
.steps li { counter-increment: s; position: relative; padding-left: 22px; }
.steps li::before { content: counter(s) "."; position: absolute; left: 0; font-weight: 600; color: var(--blue); }
.note { font-size: 13px; color: var(--ink-2); }
.ans details { border-top: 1px solid var(--line); padding-top: 8px; font-size: 13px; }
.ans summary { cursor: pointer; font-weight: 600; list-style: none; display: flex; align-items: center; gap: 8px; }
.ans summary::-webkit-details-marker { display: none; }
.ans summary::before { content: ""; width: 6px; height: 6px; border: solid var(--ink-3); border-width: 0 1.5px 1.5px 0; transform: rotate(-45deg); transition: transform .15s; }
.ans details[open] summary::before { transform: rotate(45deg); }
.ans details p { color: var(--ink-2); margin-top: 4px; }
.src code { font-size: 11.5px; color: var(--ink); word-break: break-all; }
.acts { display: flex; gap: 8px; flex-wrap: wrap; padding-top: 4px; }
.acts span { font-size: 12.5px; font-weight: 600; border-radius: 6px; padding: 5px 10px; border: 1px solid var(--line); color: var(--ink-2); }
.acts span.ok { border-color: var(--green); color: #1E7A4C; background: #EEF8F2; }
.caret { display: inline-block; width: .7em; height: .32em; background: var(--amber); margin-left: .3em; vertical-align: .15em; }

.tabs { display: flex; gap: 8px; margin-top: 18px; flex-wrap: wrap; justify-content: center; }
.tabs button { font: 500 14px var(--sans); color: #C8D6E8; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.14); border-radius: 999px; padding: 8px 16px; min-height: 40px; cursor: pointer; }
.tabs button:hover { color: #FFFFFF; border-color: rgba(255,255,255,.4); }
.tabs button[aria-pressed="true"] { background: #FFFFFF; color: var(--navy); border-color: #FFFFFF; font-weight: 600; }
.tabs-note { text-align: center; font-size: 13px; color: #8FA6C3; margin-top: 10px; }

/* ---------- stats ---------- */
.stats { margin-top: -64px; position: relative; z-index: 1; }
.stats dl { margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); background: var(--surface); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); }
.stats div { padding: 28px 28px 26px; border-left: 1px solid var(--line); display: flex; flex-direction: column-reverse; justify-content: flex-end; gap: 6px; }
.stats div:first-child { border-left: 0; }
.stats dt { font-size: 15px; color: var(--ink-2); line-height: 1.45; }
.stats dd { margin: 0; font-size: 34px; font-weight: 700; letter-spacing: -0.03em; color: var(--navy); line-height: 1.1; }

/* ---------- sections ---------- */
.sec { padding-block: 112px; }
.sec.alt { background: var(--ground); }
.head { max-width: 46rem; margin-bottom: 56px; }
.head.center { margin-inline: auto; text-align: center; }
.label { font-size: 15px; font-weight: 600; color: var(--blue); }
.head h2 { font-size: clamp(30px, 3.4vw, 42px); margin-top: 10px; }
.head p { margin-top: 16px; color: var(--ink-2); font-size: 18px; }

/* problems */
.probs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.prob { border: 1px solid var(--line); border-radius: 12px; padding: 28px; display: grid; gap: 16px; align-content: start; background: var(--surface); }
.prob .was { color: var(--ink-2); font-size: 16px; padding-bottom: 16px; border-bottom: 1px dashed var(--line); }
.prob h3 { font-size: 19px; }
.prob .now { font-size: 16px; }
.prob .now b { color: var(--blue); font-weight: 600; }

/* feature rows */
.feat { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 72px; align-items: center; }
.feat + .feat { margin-top: 120px; }
.feat.flip .feat-text { order: 2; }
.feat-text h3 { font-size: clamp(26px, 2.6vw, 34px); margin-top: 10px; }
.feat-text > p { margin-top: 16px; color: var(--ink-2); font-size: 17.5px; max-width: 34em; }
.checks { list-style: none; margin: 26px 0 0; padding: 0; display: grid; gap: 12px; }
.checks li { position: relative; padding-left: 32px; font-size: 16px; }
.checks li::before { content: ""; position: absolute; left: 0; top: 3px; width: 20px; height: 20px; border-radius: 50%; background: var(--tint) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M6 10.5l2.6 2.6L14 7.6' fill='none' stroke='%2308559B' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/20px no-repeat; }
.stage { background: linear-gradient(180deg, var(--tint), #F4F8FC); border-radius: 18px; padding: 40px; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); overflow: hidden; }
.panel-h { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 20px; border-bottom: 1px solid var(--line); }
.panel-h b { font-size: 15px; }
.panel-h span { color: var(--ink-3); font-size: 13px; }

.tier-list { list-style: none; margin: 0; padding: 8px 20px 12px; }
.tier-list li { display: grid; grid-template-columns: 36px 1fr auto; gap: 14px; align-items: center; padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 14.5px; }
.tier-list li:last-child { border-bottom: 0; }
.tier-list .n { width: 32px; height: 32px; border-radius: 8px; display: grid; place-items: center; font-weight: 700; color: #FFFFFF; background: var(--blue); }
.tier-list li:nth-child(2) .n { background: #2B6CB0; }
.tier-list li:nth-child(3) .n { background: #6E93BD; }
.tier-list li:nth-child(4) .n { background: #A3B8CF; }
.tier-list b { display: block; font-weight: 600; }
.tier-list small { color: var(--ink-3); font-size: 13px; }
.pill { font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 999px; white-space: nowrap; }
.pill.g { background: #EEF8F2; color: #1E7A4C; }
.pill.b { background: var(--tint); color: var(--blue); }
.pill.a { background: #FEF6E2; color: #8A6100; }
.pill.x { background: #F0F2F4; color: var(--ink-2); }

/* severity stamps: horizontal slats like a roller shutter, same as the portal */
.sev { font-weight: 700; font-size: 12px; padding: 3px 8px; border-radius: 4px; }
.s1 { background: var(--red) repeating-linear-gradient(180deg, rgba(255,255,255,.12) 0 1px, transparent 1px 6px); color: #FFFFFF; }
.s2 { background: var(--amber) repeating-linear-gradient(180deg, rgba(0,0,0,.06) 0 1px, transparent 1px 6px); color: var(--ink); }
.s3 { background: #6B7680 repeating-linear-gradient(180deg, rgba(255,255,255,.12) 0 1px, transparent 1px 6px); color: #FFFFFF; }
.queue { list-style: none; margin: 0; padding: 0; }
.queue li { display: grid; grid-template-columns: auto 1fr auto; gap: 14px; align-items: center; padding: 14px 20px; border-bottom: 1px solid var(--line); font-size: 14px; }
.queue b { display: block; font-weight: 600; }
.queue small { color: var(--ink-3); font-size: 12.5px; }
.queue .due { font-size: 12.5px; color: var(--ink-2); text-align: right; white-space: nowrap; }
.queue .due.late { color: var(--red); font-weight: 600; }
.queue li.on { background: #F7FAFD; box-shadow: inset 3px 0 0 var(--blue); }
.why { margin: 16px 20px 18px; padding: 12px 14px; border-radius: 8px; background: var(--ground); font-size: 13.5px; color: var(--ink-2); }
.why b { color: var(--ink); }

.diff { font: 500 12.5px/1.7 var(--mono); padding: 12px 0; }
.diff div { padding: 0 20px; white-space: pre-wrap; }
.diff .del { background: #FDECEC; color: #8E1B1B; }
.diff .add { background: #E9F6EE; color: #17643D; }
.diff .ctx { color: var(--ink-2); }
.comment { margin: 0 20px 14px; border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; font-size: 13.5px; display: grid; gap: 4px; }
.comment small { color: var(--ink-3); }
.approve { display: flex; justify-content: flex-end; gap: 8px; padding: 14px 20px; border-top: 1px solid var(--line); background: var(--ground); }
.approve span { font-size: 13px; font-weight: 600; padding: 7px 14px; border-radius: 6px; border: 1px solid var(--line); background: #FFFFFF; }
.approve span.go { background: var(--blue); color: #FFFFFF; border-color: var(--blue); }

.kpis { display: grid; grid-template-columns: repeat(3, 1fr); border-bottom: 1px solid var(--line); }
.kpis div { padding: 16px 20px; border-left: 1px solid var(--line); }
.kpis div:first-child { border-left: 0; }
.kpis small { display: block; color: var(--ink-3); font-size: 12.5px; }
.kpis b { font-size: 24px; letter-spacing: -0.02em; }
.bars { padding: 18px 20px 8px; display: grid; gap: 10px; font-size: 13px; }
.bars div { display: grid; grid-template-columns: 34px 1fr 30px; gap: 12px; align-items: center; }
.bars i { display: block; height: 12px; border-radius: 3px; background: linear-gradient(90deg, var(--blue) var(--v), var(--tint) var(--v)); }
.bars span:last-child { color: var(--ink-2); text-align: right; }
.caption { padding: 4px 20px 16px; font-size: 12px; color: var(--ink-3); }

/* channels */
.chan { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.chan article { border: 1px solid var(--line); border-radius: 14px; padding: 32px; display: grid; gap: 14px; align-content: start; }
.chan h3 { font-size: 22px; display: flex; align-items: center; gap: 12px; }
.chan h3 i { width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center; background: var(--tint); }
.icon { width: 22px; height: 22px; stroke: var(--blue); fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.chan p { color: var(--ink-2); font-size: 16px; }
.chan dl { margin: 8px 0 0; display: grid; font-size: 15px; }
.chan dl div { display: grid; grid-template-columns: 120px 1fr; gap: 12px; padding: 11px 0; border-top: 1px solid var(--line); }
.chan dt { color: var(--ink-3); }
.chan dd { margin: 0; }

/* trust */
.trust { background: var(--night); color: #FFFFFF; }
.trust .head p { color: #A9BCD4; }
.trust .label { color: var(--amber); }
.trust-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.1); border-radius: 14px; overflow: hidden; }
.trust-grid > div { background: var(--night); padding: 32px 30px; display: grid; gap: 10px; align-content: start; }
.trust-grid .icon { width: 26px; height: 26px; stroke: #8DBBEA; stroke-width: 1.7; margin-bottom: 6px; }
.trust-grid h3 { font-size: 18px; letter-spacing: -0.01em; }
.trust-grid p { color: #A9BCD4; font-size: 15.5px; }

/* rollout: a real sequence */
.roll { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: r; }
.roll li { counter-increment: r; position: relative; padding-top: 64px; }
.roll li::before { content: counter(r); position: absolute; top: 0; left: 0; width: 44px; height: 44px; border-radius: 12px; background: var(--blue); color: #FFFFFF; font-weight: 700; font-size: 18px; display: grid; place-items: center; }
.roll li::after { content: ""; position: absolute; top: 22px; left: 60px; right: -12px; height: 2px; background: repeating-linear-gradient(90deg, var(--line) 0 6px, transparent 6px 12px); }
.roll li:last-child::after { display: none; }
.roll h3 { font-size: 19px; }
.roll p { margin-top: 8px; color: var(--ink-2); font-size: 15.5px; }

/* closing */
.close { padding-block: 0 112px; }
.close-box { background: var(--blue); color: #FFFFFF; border-radius: 20px; padding: 64px; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 40px; align-items: center; position: relative; overflow: hidden; }
.close-box::before { content: ""; position: absolute; inset: 0; background: repeating-linear-gradient(180deg, rgba(255,255,255,.05) 0 1px, transparent 1px 8px); pointer-events: none; }
.close-box > * { position: relative; }
.close-box h2 { font-size: clamp(28px, 3.2vw, 40px); max-width: 20ch; }
.close-box p { margin-top: 14px; color: #D5E3F2; max-width: 52ch; }
.close-box .cta { display: flex; flex-wrap: wrap; gap: 12px; }
.close-box :focus-visible { outline-color: #FFFFFF; }

footer { border-top: 1px solid var(--line); }
footer .wrap { padding-block: 36px 44px; display: flex; flex-wrap: wrap; gap: 20px 40px; justify-content: space-between; align-items: center; font-size: 13.5px; color: var(--ink-3); }
footer .logo { width: 150px; height: auto; display: block; --logo-die: #08559B; --logo-a: #FFFFFF; --logo-word: #003388; --logo-for: #08559B; }
footer p { max-width: 68ch; }

@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; padding-bottom: 112px; }
  .hero-copy { max-width: 40rem; }
  .feat, .feat.flip { grid-template-columns: 1fr; gap: 40px; }
  .feat.flip .feat-text { order: 0; }
  .stats dl { grid-template-columns: repeat(2, 1fr); }
  .stats div:nth-child(3) { border-left: 0; }
  .stats div:nth-child(n+3) { border-top: 1px solid var(--line); }
  .probs, .trust-grid { grid-template-columns: 1fr 1fr; }
  .roll { grid-template-columns: 1fr 1fr; row-gap: 40px; }
  .roll li:nth-child(2)::after { display: none; }
  .close-box { grid-template-columns: 1fr; padding: 48px; }
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .top nav a:not(.btn):not(.lang) { display: none; }
  .lang .long { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .lang .short { display: inline; }
  .top .btn { white-space: nowrap; margin-left: 4px; }
  .top .logo { width: 150px; }
  .hero-grid { padding-top: 24px; }
  .hero .lede { font-size: 17px; }
  .hero .cta .btn { flex: 1 1 auto; }
  .app { grid-template-columns: 1fr; height: auto; min-height: 560px; }
  .rail { display: none; }
  .chat { padding: 16px 14px; }
  .chrome span { margin-left: 8px; }
  .stats div { padding: 20px; }
  .stats dd { font-size: 28px; }
  .sec { padding-block: 80px; }
  .head { margin-bottom: 40px; }
  .probs, .trust-grid, .chan, .roll { grid-template-columns: 1fr; }
  .roll li::after { display: none; }
  .stage { padding: 16px; border-radius: 14px; }
  .feat + .feat { margin-top: 80px; }
  .queue li { grid-template-columns: auto 1fr; }
  .queue .due { grid-column: 2; text-align: left; }
  .chan article { padding: 24px; }
  .chan dl div { grid-template-columns: 1fr; gap: 2px; }
  .kpis b { font-size: 20px; }
  .kpis div { padding: 14px; }
  .close-box { padding: 36px 24px; border-radius: 16px; }
  .close-box .cta .btn { flex: 1 1 auto; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .status::before { animation: none; }
}