@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Manrope:wght@400;500;600;700;800&display=swap');

:root {
  --ink: #eaf2eb;
  --muted: #9eaaa2;
  --dim: #718078;
  --page: #0b100d;
  --surface: #111914;
  --surface-2: #151f19;
  --line: #26332a;
  --line-soft: #1b2720;
  --mint: #85efad;
  --mint-strong: #46d980;
  --mint-dark: #183d27;
  --amber: #f6c56a;
  --amber-dark: #422f14;
  --red: #ff8f84;
  --max: 1180px;
  --mono: "DM Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "Manrope", Inter, ui-sans-serif, system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body { margin: 0; color: var(--ink); background: var(--page); font-family: var(--sans); line-height: 1.68; }
a { color: inherit; }
strong { color: #f5faf6; }
code, kbd { font-family: var(--mono); }
code { color: #b6f5ce; }
kbd { padding: .14rem .42rem; color: var(--ink); background: #222c26; border: 1px solid #35423a; border-bottom-width: 2px; border-radius: 5px; font-size: .88em; }

.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 100; padding: .65rem 1rem; color: #071009; background: var(--mint); border-radius: 5px; font-weight: 800; }
.skip-link:focus { top: 1rem; }

.site-header { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between; height: 68px; padding: 0 max(24px, calc((100vw - var(--max)) / 2)); background: rgba(11, 16, 13, .88); border-bottom: 1px solid rgba(66, 84, 72, .55); backdrop-filter: blur(14px); }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); text-decoration: none; font-size: 14px; letter-spacing: -.02em; }
.brand b { color: var(--muted); font-weight: 500; }
.brand-mark { display: grid; grid-template-columns: repeat(2, 8px); grid-template-rows: repeat(2, 8px); gap: 2px; transform: rotate(-4deg); }
.brand-mark i { display: block; background: var(--mint); }
.brand-mark i:first-child { grid-column: 1 / 3; }
.brand-mark i:last-child { background: #328654; }
.header-nav { display: flex; align-items: center; gap: 30px; font-size: 13px; }
.header-nav a { color: var(--muted); text-decoration: none; transition: color .2s ease; }
.header-nav a:hover { color: var(--ink); }
.header-nav .nav-cta { padding: 8px 13px; color: var(--mint); border: 1px solid #31563e; border-radius: 6px; background: #102218; }

.hero { position: relative; display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(300px, .62fr); gap: clamp(48px, 8vw, 110px); align-items: center; max-width: var(--max); min-height: 620px; margin: 0 auto; padding: 96px 24px 84px; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; opacity: .24; pointer-events: none; background-image: linear-gradient(rgba(133, 239, 173, .08) 1px, transparent 1px), linear-gradient(90deg, rgba(133, 239, 173, .08) 1px, transparent 1px); background-size: 42px 42px; mask-image: linear-gradient(to right, black, transparent 72%); }
.hero-glow { position: absolute; width: 520px; height: 520px; left: 6%; top: 8%; background: radial-gradient(circle, rgba(62, 220, 121, .13), transparent 67%); filter: blur(10px); pointer-events: none; }
.hero-copy { position: relative; z-index: 1; }
.eyebrow, .section-kicker, .step-label { margin: 0 0 18px; color: var(--muted); font: 500 11px/1.2 var(--mono); letter-spacing: .14em; text-transform: uppercase; }
.eyebrow { display: flex; align-items: center; gap: 10px; color: var(--mint); }
.eyebrow span { width: 7px; height: 7px; background: var(--mint); box-shadow: 0 0 14px var(--mint); }
.hero h1 { max-width: 760px; margin: 0; font-size: clamp(52px, 7vw, 86px); line-height: .98; letter-spacing: -.065em; font-weight: 700; }
.hero h1 em { display: block; color: var(--mint); font-style: normal; }
.lede { max-width: 690px; margin: 28px 0 0; color: #adb9b1; font-size: clamp(17px, 2vw, 20px); line-height: 1.65; }
.hero-actions { display: flex; gap: 12px; margin-top: 36px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 16px; min-height: 48px; padding: 0 19px; border-radius: 5px; font-size: 13px; font-weight: 800; text-decoration: none; }
.button.primary { color: #07130b; background: var(--mint); }
.button.primary:hover { background: #a1f5bf; }
.button.secondary { color: var(--ink); background: #151d18; border: 1px solid #334038; }
.button.secondary:hover { border-color: #526258; }

.version-card { position: relative; z-index: 1; padding: 22px; background: linear-gradient(145deg, rgba(25, 39, 30, .96), rgba(14, 22, 17, .96)); border: 1px solid #35473b; border-radius: 9px; box-shadow: 0 28px 65px rgba(0, 0, 0, .28); }
.version-card::after { content: ""; position: absolute; right: -1px; top: 28px; width: 3px; height: 62px; background: var(--mint); box-shadow: 0 0 18px rgba(133, 239, 173, .6); }
.card-topline { display: flex; justify-content: space-between; color: var(--dim); font: 500 10px/1 var(--mono); letter-spacing: .15em; }
.live-dot { display: flex; gap: 7px; align-items: center; color: var(--mint); letter-spacing: .04em; text-transform: none; }
.live-dot::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--mint); }
.pack-name { margin: 25px 0 20px; font-size: 23px; font-weight: 750; letter-spacing: -.035em; }
.version-card dl { margin: 0; border-top: 1px solid var(--line); }
.version-card dl div { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 13px; }
.version-card dt { color: var(--muted); }
.version-card dd { margin: 0; font-family: var(--mono); font-size: 12px; }
.version-card > p { margin: 18px 0 0; color: var(--dim); font-size: 11px; line-height: 1.55; }

.before-you-start { display: grid; grid-template-columns: .65fr 2fr; gap: 50px; max-width: var(--max); margin: 0 auto; padding: 72px 24px 88px; border-top: 1px solid var(--line); }
.section-kicker { margin-bottom: 10px; }
.before-you-start h2 { margin: 0; font-size: 26px; line-height: 1.2; letter-spacing: -.04em; }
.check-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.check-grid article { position: relative; min-height: 225px; padding: 20px; background: var(--surface); border: 1px solid var(--line-soft); border-radius: 7px; }
.check-number { color: #4e5d54; font: 500 11px var(--mono); }
.check-grid h3 { margin: 35px 0 10px; font-size: 16px; }
.check-grid p { margin: 0 0 16px; color: var(--muted); font-size: 12px; line-height: 1.6; }
.check-grid a { color: var(--mint); font-size: 11px; font-weight: 700; text-underline-offset: 3px; }

.guide-layout { display: grid; grid-template-columns: 210px minmax(0, 820px); gap: 58px; max-width: var(--max); margin: 0 auto; padding: 50px 24px 130px; border-top: 1px solid var(--line); }
.contents { position: sticky; top: 105px; align-self: start; padding-top: 8px; }
.contents > p { color: var(--dim); font: 500 10px var(--mono); letter-spacing: .12em; text-transform: uppercase; }
.contents ol { padding: 0; margin: 20px 0; list-style: none; }
.contents li { margin: 12px 0; }
.contents li a { display: flex; align-items: center; gap: 10px; color: #b9c3bc; font-size: 12px; text-decoration: none; }
.contents li a:hover, .contents li a.active { color: var(--mint); }
.contents li span { display: grid; width: 20px; height: 20px; place-items: center; border: 1px solid #3b4b41; border-radius: 3px; font: 500 9px var(--mono); }
.contents li.sub { margin: 7px 0 7px 30px; }
.contents li.sub a { color: var(--dim); font-size: 11px; }
.contents li.sub a:hover, .contents li.sub a.active { color: var(--ink); }

.major-section + .major-section { margin-top: 130px; padding-top: 90px; border-top: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: 74px 1fr; gap: 24px; margin-bottom: 45px; }
.big-number { display: grid; width: 64px; height: 64px; place-items: center; color: #07130b; background: var(--mint); border-radius: 6px; font: 700 20px var(--mono); box-shadow: 10px 10px 0 #173822; }
.big-number.amber { background: var(--amber); box-shadow: 10px 10px 0 #3d301a; }
.section-kicker.mint { color: var(--mint); }
.amber-text { color: var(--amber); }
.section-heading h2 { margin: 0; font-size: clamp(34px, 5vw, 52px); line-height: 1.06; letter-spacing: -.055em; }
.section-heading p:last-child { max-width: 650px; margin: 16px 0 0; color: var(--muted); font-size: 15px; }

.callout { display: grid; grid-template-columns: 37px 1fr; gap: 15px; margin: 32px 0 44px; padding: 18px 20px; border-radius: 6px; }
.callout.success { background: #10231a; border: 1px solid #285039; }
.callout.warning { background: #241d11; border: 1px solid #544323; }
.callout.note { background: #151f1a; border: 1px solid #304238; }
.callout.danger { background: #261715; border: 1px solid #58312d; }
.callout.compact { margin: 24px 0 0; }
.callout-icon { display: grid; width: 30px; height: 30px; place-items: center; border-radius: 50%; color: #092011; background: var(--mint); font: 800 14px var(--mono); }
.warning .callout-icon { color: #251904; background: var(--amber); }
.note .callout-icon { color: var(--ink); background: #44534a; }
.danger .callout-icon { color: #210908; background: var(--red); }
.callout strong { display: block; margin-top: 2px; font-size: 13px; }
.callout p { margin: 4px 0 0; color: var(--muted); font-size: 12px; line-height: 1.6; }

.step { display: grid; grid-template-columns: 50px minmax(0, 1fr); gap: 24px; scroll-margin-top: 92px; }
.step + .step { margin-top: 5px; }
.step-rail { display: flex; flex-direction: column; align-items: center; }
.step-rail span { position: relative; z-index: 1; display: grid; flex: 0 0 auto; width: 36px; height: 36px; place-items: center; color: var(--mint); background: #122118; border: 1px solid #31533e; border-radius: 50%; font: 600 11px var(--mono); }
.step-rail i { width: 1px; flex: 1; min-height: 50px; background: linear-gradient(var(--line), transparent); }
.amber-rail span { color: var(--amber); background: #211b11; border-color: #574421; }
.step-body { padding: 6px 0 70px; }
.step-label { margin-bottom: 9px; color: var(--mint); }
.step-body h3 { margin: 0 0 20px; font-size: 24px; line-height: 1.25; letter-spacing: -.035em; }
.step-body > p { color: var(--muted); font-size: 13px; }
.step-body ol { padding-left: 20px; margin: 0; }
.step-body li { padding-left: 8px; margin: 0 0 12px; color: #aab5ae; font-size: 13px; }
.step-body li::marker { color: var(--mint); font: 500 11px var(--mono); }
.manual-section .step-body li::marker { color: var(--amber); }
.step-body li ul { padding: 9px 0 0 18px; }
.step-body li li { margin-bottom: 7px; }
.step-body a { color: #b9f5cf; text-decoration-color: #477359; text-underline-offset: 3px; }
.manual-section .step-body a { color: #ffe1a8; text-decoration-color: #775f32; }
.fine-print { padding: 13px 15px; border-left: 2px solid #445249; background: #101712; }

.link-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 24px; }
.mini-link { display: grid; grid-template-columns: 34px 1fr; padding: 13px; color: var(--ink) !important; background: var(--surface); border: 1px solid var(--line); border-radius: 6px; text-decoration: none; }
.mini-link:hover { border-color: #496052; background: var(--surface-2); }
.mini-link > span { grid-row: 1 / 3; display: grid; width: 26px; height: 26px; place-items: center; align-self: center; color: var(--mint); border: 1px solid #345841; border-radius: 4px; font: 600 11px var(--mono); }
.mini-link b { font-size: 12px; }
.mini-link small { color: var(--dim); font-size: 10px; }

.memory-table { margin: 20px 0 24px; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.memory-table > div { display: grid; grid-template-columns: 1fr 1fr 1.25fr; }
.memory-table > div + div { border-top: 1px solid var(--line); }
.memory-table span { padding: 10px 13px; color: var(--muted); font-size: 11px; }
.memory-table > div:first-child { background: #17201a; }
.memory-table [role="columnheader"] { color: var(--dim); font: 500 9px var(--mono); letter-spacing: .08em; text-transform: uppercase; }

.code-block { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: 18px 0; padding: 14px 14px 14px 17px; background: #070c09; border: 1px solid #29372e; border-radius: 5px; overflow-x: auto; }
.code-block code { white-space: nowrap; font-size: 12px; }
.copy-button { flex: 0 0 auto; padding: 6px 10px; color: var(--muted); background: #172019; border: 1px solid #334139; border-radius: 4px; font: 500 9px var(--mono); cursor: pointer; }
.copy-button:hover { color: var(--ink); }

.manifest-diagram { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 12px; align-items: center; margin: 26px 0; }
.manifest-diagram > div { min-width: 0; padding: 13px; background: #161b13; border: 1px solid #3a3624; border-radius: 5px; }
.manifest-diagram small { display: block; margin-bottom: 4px; color: var(--dim); font-size: 9px; text-transform: uppercase; }
.manifest-diagram code { display: block; color: var(--amber); font-size: 9px; overflow: hidden; text-overflow: ellipsis; }
.manifest-diagram > span { color: #75633c; }

.folder-tree { margin-top: 24px; padding: 18px 22px; background: #080d0a; border: 1px solid #2a372e; border-radius: 5px; font: 400 11px/1.75 var(--mono); }
.folder-tree p { margin: 0; color: #66736b; }
.folder-tree span { color: #c6d1c9; }
.folder-tree em { color: var(--amber); font-style: normal; }

.split-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.split-cards > div { padding: 20px; background: #171b13; border: 1px solid #3b3826; border-radius: 6px; }
.content-icon { display: grid; width: 30px; height: 30px; place-items: center; color: var(--amber); border: 1px solid #62512c; border-radius: 4px; }
.split-cards h4 { margin: 23px 0 8px; font-size: 14px; }
.split-cards p { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.65; }

.shader-guide { margin-top: 34px; padding: 24px; background: radial-gradient(circle at 90% 0, rgba(246, 197, 106, .08), transparent 35%), #111711; border: 1px solid #4a4028; border-radius: 7px; scroll-margin-top: 92px; }
.shader-heading { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.shader-heading .step-label { margin: 0 0 5px; }
.shader-heading h4 { margin: 0; font-size: 17px; letter-spacing: -.025em; }
.shader-icon { flex: 0 0 auto; color: #1d1608; background: var(--amber); border-color: var(--amber); box-shadow: 0 0 22px rgba(246, 197, 106, .22); }
.shader-guide > p, .shader-guide li { color: var(--muted); font-size: 11px; }
.shader-guide > p { margin: 0 0 16px; }
.shader-guide ol { margin-bottom: 20px; }
.shader-notes { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.shader-notes p { min-width: 0; margin: 0; padding: 11px 12px; color: var(--dim); background: #0a0f0b; border: 1px solid #31392e; border-radius: 4px; font-size: 9px; }
.shader-notes strong, .shader-notes code { display: block; }
.shader-notes strong { margin-bottom: 4px; color: var(--amber); font: 500 8px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.shader-notes code { overflow: hidden; color: #b9c6bd; text-overflow: ellipsis; white-space: nowrap; }
.shader-source { margin: 16px 0 0 !important; }

.trouble-list { border-top: 1px solid var(--line); }
.trouble-list details { border-bottom: 1px solid var(--line); }
.trouble-list summary { padding: 15px 4px; color: #cbd3cd; font-size: 12px; font-weight: 600; cursor: pointer; }
.trouble-list details p { margin: -4px 4px 16px; color: var(--muted); font-size: 11px; }
.support-links { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 25px; }
.support-links a { font-size: 11px; }

footer { display: grid; grid-template-columns: 1.5fr .8fr .8fr; gap: 60px; padding: 62px max(24px, calc((100vw - var(--max)) / 2)); background: #080c09; border-top: 1px solid var(--line); }
.footer-brand { margin-bottom: 18px; }
footer p, footer a { display: block; max-width: 450px; margin: 4px 0; color: var(--dim); font-size: 10px; line-height: 1.7; }
footer a:hover { color: var(--mint); }
.footer-title { margin: 0 0 11px; color: #b6c1b9; font: 500 10px var(--mono); letter-spacing: .09em; text-transform: uppercase; }

@media (max-width: 900px) {
  .header-nav > a:not(.nav-cta) { display: none; }
  .hero { grid-template-columns: 1fr; min-height: auto; padding-top: 80px; }
  .version-card { max-width: 520px; }
  .before-you-start { grid-template-columns: 1fr; }
  .guide-layout { grid-template-columns: 1fr; }
  .contents { display: none; }
  .check-grid { grid-template-columns: 1fr; }
  .check-grid article { min-height: auto; }
  .check-grid h3 { margin-top: 20px; }
}

@media (max-width: 620px) {
  .site-header { height: 62px; padding-inline: 16px; }
  .brand b { display: none; }
  .hero { padding: 62px 18px 68px; }
  .hero h1 { font-size: 50px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .before-you-start, .guide-layout { padding-left: 18px; padding-right: 18px; }
  .section-heading { grid-template-columns: 1fr; }
  .big-number { width: 52px; height: 52px; }
  .step { grid-template-columns: 36px minmax(0, 1fr); gap: 13px; }
  .step-rail span { width: 31px; height: 31px; }
  .step-body h3 { font-size: 21px; }
  .link-row, .split-cards, .shader-notes { grid-template-columns: 1fr; }
  .memory-table span { padding: 9px 7px; font-size: 9px; }
  .manifest-diagram { grid-template-columns: 1fr; }
  .manifest-diagram > span { transform: rotate(90deg); justify-self: center; }
  footer { grid-template-columns: 1fr; gap: 30px; padding: 48px 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}