:root {
  --ink: #071526;
  --ink-soft: #23344a;
  --muted: #66768b;
  --line: #dfe7f0;
  --paper: #f6f9fc;
  --white: #ffffff;
  --blue: #2f70ff;
  --blue-dark: #1d4ed8;
  --cyan: #07b5c9;
  --violet: #7657f5;
  --teal: #08a889;
  --orange: #f28c38;
  --pink: #df5d91;
  --shadow: 0 18px 55px rgba(20, 45, 82, 0.09);
  --radius: 22px;
  --mono: "DM Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Manrope", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body { margin: 0; color: var(--ink); background: var(--white); font-family: var(--sans); line-height: 1.65; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.section-shell { width: min(1160px, calc(100% - 48px)); margin: 0 auto; }

.topbar { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between; gap: 24px; width: 100%; padding: 16px max(24px, calc((100vw - 1160px) / 2)); background: rgba(255,255,255,.84); border-bottom: 1px solid rgba(223,231,240,.8); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); }
.brand { display: inline-flex; align-items: center; gap: 11px; font-size: 1rem; font-weight: 800; letter-spacing: -.025em; }
.brand-mark { position: relative; display: inline-flex; align-items: center; justify-content: center; width: 30px; height: 30px; overflow: hidden; border-radius: 9px; background: var(--ink); transform: rotate(-8deg); }
.brand-mark span { display: block; width: 4px; height: 16px; margin: 0 2px; border-radius: 3px; background: var(--cyan); transform: rotate(28deg); }
.brand-mark span:nth-child(2) { height: 22px; background: var(--blue); }
.brand-mark span:nth-child(3) { height: 12px; background: var(--violet); }
.site-nav { display: flex; align-items: center; gap: 6px; }
.site-nav a { padding: 7px 11px; color: var(--muted); font-size: .86rem; font-weight: 700; border-radius: 8px; transition: color .18s, background .18s; }
.site-nav a:hover { color: var(--blue-dark); background: #eef4ff; }
.site-nav .nav-button { margin-left: 8px; padding: 9px 15px; color: var(--white); background: var(--ink); }
.site-nav .nav-button:hover { color: var(--white); background: var(--blue-dark); }
.menu-toggle { display: none; border: 0; background: transparent; cursor: pointer; }

.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(420px, .87fr); gap: 64px; align-items: center; min-height: 650px; padding-top: 74px; padding-bottom: 78px; }
.eyebrow { margin: 0 0 16px; color: var(--blue-dark); font-family: var(--mono); font-size: .84rem; font-weight: 600; letter-spacing: .075em; text-transform: uppercase; }
.eyebrow-dot { display: inline-block; width: 7px; height: 7px; margin: 0 8px 1px 0; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 4px rgba(7,181,201,.12); }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 690px; margin-bottom: 23px; font-size: clamp(2.8rem, 6vw, 5.4rem); line-height: 1.01; letter-spacing: -.07em; }
h1 em { color: var(--blue); font-style: normal; }
.hero-lede { max-width: 585px; margin-bottom: 30px; color: var(--muted); font-size: 1.06rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 11px; margin-bottom: 22px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 9px; min-height: 45px; padding: 10px 17px; border: 1px solid transparent; border-radius: 999px; font-size: .84rem; font-weight: 800; transition: transform .18s, box-shadow .18s, background .18s, border-color .18s; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: var(--white); background: var(--ink); box-shadow: 0 10px 22px rgba(7,21,38,.16); }
.button-primary:hover { color: var(--white); background: var(--blue-dark); box-shadow: 0 13px 28px rgba(29,78,216,.25); }
.button-ghost { color: var(--ink-soft); border-color: var(--line); background: var(--white); }
.button-ghost:hover { border-color: #a9c3ef; background: #f5f8ff; }
.github-icon { font-size: 1.2rem; line-height: 0; transform: rotate(-25deg); }
.hero-note { color: var(--muted); font-family: var(--mono); font-size: .75rem; letter-spacing: .01em; }
.status-dot { display: inline-block; width: 7px; height: 7px; margin-right: 7px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 4px rgba(8,168,137,.11); }

.hero-visual { position: relative; min-height: 480px; overflow: hidden; border: 1px solid #d8e4f4; border-radius: 30px; background: linear-gradient(145deg, #f7fbff 0%, #eef4ff 48%, #f8f7ff 100%); box-shadow: var(--shadow); }
.visual-grid { position: absolute; inset: 0; opacity: .55; background-image: linear-gradient(rgba(47,112,255,.09) 1px, transparent 1px), linear-gradient(90deg, rgba(47,112,255,.09) 1px, transparent 1px); background-size: 31px 31px; mask-image: radial-gradient(circle at 50% 50%, black 0, transparent 77%); }
.visual-orbit { position: absolute; border: 1px solid rgba(47,112,255,.14); border-radius: 50%; transform: rotate(-26deg); }
.orbit-one { width: 460px; height: 160px; top: 145px; left: -20px; }
.orbit-two { width: 480px; height: 205px; top: 132px; left: -32px; border-color: rgba(118,87,245,.16); transform: rotate(25deg); }
.visual-label { position: absolute; color: #7f95b1; font-family: var(--mono); font-size: .69rem; letter-spacing: .075em; }
.label-input { top: 24px; left: 29px; }
.label-output { right: 29px; bottom: 25px; }
.visual-node { position: absolute; z-index: 2; display: flex; flex-direction: column; width: 188px; padding: 15px 16px; border: 1px solid rgba(183,204,232,.85); border-radius: 15px; background: rgba(255,255,255,.86); box-shadow: 0 13px 28px rgba(54,93,145,.12); }
.visual-node strong { margin-top: 9px; font-size: .9rem; letter-spacing: -.02em; }
.visual-node small { margin-top: 2px; color: var(--muted); font-family: var(--mono); font-size: .66rem; line-height: 1.45; }
.node-icon { display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; color: var(--white); border-radius: 8px; background: var(--cyan); font-size: 1.25rem; }
.node-icon-agent { background: var(--blue); }
.node-icon-output { background: var(--violet); }
.node-input { top: 81px; left: 30px; }
.node-agent { top: 198px; left: 166px; }
.node-output { right: 27px; bottom: 73px; }
.visual-arrow { position: absolute; z-index: 3; color: var(--blue); font-size: 1.6rem; font-weight: 800; }
.arrow-one { top: 165px; left: 225px; transform: rotate(35deg); }
.arrow-two { right: 206px; bottom: 151px; transform: rotate(35deg); }
.visual-loop { position: absolute; right: 26px; top: 28px; color: var(--violet); font-family: var(--mono); font-size: .73rem; line-height: 1.4; text-align: right; letter-spacing: .025em; }
.visual-loop span { color: var(--muted); }

.signal-strip { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--paper); }
.signal-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding-top: 21px; padding-bottom: 21px; }
.signal-item { display: flex; align-items: center; gap: 13px; min-width: 0; }
.signal-mark { display: inline-flex; align-items: center; justify-content: center; flex: 0 0 auto; width: 36px; height: 36px; color: var(--blue-dark); border: 1px solid #c7d8f7; border-radius: 10px; background: #edf4ff; font-size: 1rem; }
.signal-item b, .signal-item small { display: block; }
.signal-item b { font-size: .9rem; letter-spacing: -.015em; }
.signal-item small { margin-top: 2px; color: var(--muted); font-family: var(--mono); font-size: .67rem; line-height: 1.4; }

.content-section { padding-top: 122px; padding-bottom: 122px; }
.section-heading { max-width: 780px; margin-bottom: 46px; }
.section-heading h2, .dark-heading h2 { margin-bottom: 15px; font-size: clamp(2rem, 4vw, 3.35rem); line-height: 1.08; letter-spacing: -.06em; }
.overview-grid { display: grid; grid-template-columns: 1fr .85fr; gap: 88px; align-items: start; }
.overview-copy { max-width: 560px; color: var(--muted); font-size: .96rem; }
.overview-copy .lead { color: var(--ink-soft); font-size: 1.16rem; line-height: 1.65; }
.principle-card { margin-top: 31px; padding: 21px 24px; border-left: 3px solid var(--blue); background: #f2f6ff; }
.principle-number { color: var(--blue-dark); font-family: var(--mono); font-size: .7rem; letter-spacing: .1em; }
.principle-card p { margin: 8px 0 0; color: var(--ink); font-size: 1.05rem; font-weight: 800; letter-spacing: -.03em; }
.pipeline-card { padding: 24px 26px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); box-shadow: var(--shadow); }
.pipeline-caption { margin-bottom: 22px; color: var(--muted); font-family: var(--mono); font-size: .74rem; letter-spacing: .08em; text-transform: uppercase; }
.pipeline-step { display: grid; grid-template-columns: 35px 1fr; column-gap: 13px; align-items: baseline; }
.pipeline-step > span { grid-row: span 2; color: var(--blue); font-family: var(--mono); font-size: .72rem; }
.pipeline-step b { font-size: .95rem; }
.pipeline-step small { color: var(--muted); font-size: .78rem; line-height: 1.45; }
.pipeline-step.active b { color: var(--blue-dark); }
.pipeline-connector { width: 1px; height: 22px; margin: 7px 0 7px 5px; background: #bfd0e7; }

.section-tinted { width: 100%; padding-right: max(24px, calc((100vw - 1160px) / 2)); padding-left: max(24px, calc((100vw - 1160px) / 2)); background: var(--paper); }
.section-tinted > * { width: min(1160px, 100%); margin-right: auto; margin-left: auto; }
.split-heading { display: grid; grid-template-columns: 1fr .7fr; gap: 80px; max-width: none; align-items: end; }
.split-heading > p { max-width: 440px; margin-bottom: 4px; color: var(--muted); font-size: .98rem; }
.task-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.task-card { position: relative; min-height: 256px; overflow: hidden; padding: 24px; border: 1px solid var(--line); border-radius: 17px; background: var(--white); transition: transform .18s, box-shadow .18s, border-color .18s; }
.task-card:hover { transform: translateY(-4px); border-color: #b8cce9; box-shadow: var(--shadow); }
.task-index, .resource-label { color: var(--muted); font-family: var(--mono); font-size: .68rem; letter-spacing: .075em; }
.task-icon { display: flex; align-items: center; justify-content: center; width: 39px; height: 39px; margin: 26px 0 16px; color: var(--white); border-radius: 11px; background: var(--blue); font-size: 1rem; font-weight: 800; }
.task-violet .task-icon { background: var(--violet); }
.task-teal .task-icon { background: var(--teal); }
.task-orange .task-icon { background: var(--orange); }
.task-pink .task-icon { background: var(--pink); }
.task-card h3 { margin-bottom: 8px; font-size: 1.03rem; letter-spacing: -.035em; }
.task-card p { max-width: 260px; margin-bottom: 18px; color: var(--muted); font-size: .84rem; line-height: 1.55; }
.task-tag { display: inline-flex; padding: 5px 9px; color: var(--blue-dark); border-radius: 6px; background: #edf4ff; font-family: var(--mono); font-size: .67rem; }
.task-dark { display: flex; flex-direction: column; justify-content: center; color: var(--white); border-color: var(--ink); background: var(--ink); }
.task-dark .quote-mark { color: var(--cyan); font-size: 4.5rem; line-height: .7; }
.task-dark p { margin: 23px 0 20px; color: #ccdae9; font-size: 1.05rem; line-height: 1.5; }
.task-dark strong { color: var(--white); }
.task-dark .task-tag { color: #b8dcff; background: rgba(85,146,255,.16); }

.evaluation-layout { display: grid; grid-template-columns: 1.1fr .9fr; gap: 82px; align-items: start; }
.evaluation-only { display: block; }
.evaluation-only .evaluation-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 48px; }
.evaluation-list { border-top: 1px solid var(--line); }
.eval-row { display: grid; grid-template-columns: 42px 1fr 28px; gap: 16px; align-items: center; padding: 23px 0; border-bottom: 1px solid var(--line); }
.eval-number { color: var(--blue); font-family: var(--mono); font-size: .68rem; }
.eval-row h3 { margin-bottom: 3px; font-size: .96rem; letter-spacing: -.03em; }
.eval-row p { margin: 0; color: var(--muted); font-size: .79rem; }
.eval-symbol { color: var(--violet); font-size: 1.2rem; text-align: right; }
.section-dark { width: 100%; max-width: none; padding-right: max(24px, calc((100vw - 1160px) / 2)); padding-left: max(24px, calc((100vw - 1160px) / 2)); color: var(--white); background: var(--ink); }
.section-dark > * { width: min(1160px, 100%); margin-right: auto; margin-left: auto; }
.eyebrow-light { color: var(--cyan); }
.dark-heading { max-width: 670px; margin-bottom: 46px; }
.dark-heading h2 { color: var(--white); }
.dark-heading > p:last-child { margin-bottom: 0; color: #9fb1c7; font-size: .94rem; }
.submission-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 80px; align-items: center; }
.terminal-card { overflow: hidden; border: 1px solid #30465e; border-radius: 15px; background: #0c2037; box-shadow: 0 24px 60px rgba(0,0,0,.2); }
.terminal-bar { display: flex; align-items: center; gap: 6px; padding: 13px 16px; border-bottom: 1px solid #30465e; color: #8da2bb; font-family: var(--mono); font-size: .7rem; }
.terminal-bar span { width: 7px; height: 7px; border-radius: 50%; background: #ef7d7d; }
.terminal-bar span:nth-child(2) { background: #eabe69; }
.terminal-bar span:nth-child(3) { background: #6bc48e; }
.terminal-bar b { margin-left: 6px; font-weight: 400; }
.terminal-card pre { margin: 0; padding: 28px 25px 32px; overflow: auto; color: #dce8f7; font-family: var(--mono); font-size: .82rem; line-height: 1.8; }
.code-muted { color: #7490ac; }
.code-cyan { color: #63d9dd; }
.submission-copy { color: #b4c3d4; font-size: .9rem; }
.submission-copy > p { max-width: 480px; margin-bottom: 25px; }
.command-card { display: flex; align-items: flex-start; gap: 11px; margin-top: 10px; padding: 13px 15px; border: 1px solid #30465e; border-radius: 9px; color: #63d9dd; background: #0c2037; font-family: var(--mono); font-size: .74rem; line-height: 1.55; }
.command-card span { color: #829bb5; }
.command-card code { overflow-wrap: anywhere; }

.resources-section { padding-bottom: 105px; }
.resource-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.resource-card { display: flex; flex-direction: column; min-height: 245px; padding: 25px; border: 1px solid var(--line); border-radius: 17px; background: var(--white); transition: transform .18s, box-shadow .18s, border-color .18s; }
.resource-card:hover { transform: translateY(-4px); border-color: #b7ccec; box-shadow: var(--shadow); }
.resource-icon { display: flex; align-items: center; justify-content: center; width: 38px; height: 38px; margin-bottom: 24px; color: var(--blue-dark); border-radius: 10px; background: #edf4ff; font-size: 1.15rem; font-weight: 800; }
.resource-featured .resource-icon { color: var(--white); background: var(--ink); }
.resource-card h3 { margin: 10px 0 8px; font-size: 1.08rem; letter-spacing: -.04em; }
.resource-card p { margin-bottom: 20px; color: var(--muted); font-size: .84rem; line-height: 1.55; }
.resource-arrow { margin-top: auto; color: var(--blue-dark); font-family: var(--mono); font-size: .7rem; }
.resource-muted { background: var(--paper); }
.resource-muted .resource-icon { color: var(--violet); background: #f0edff; }
.resource-muted .resource-arrow { color: var(--muted); }

.cta-section { display: flex; align-items: center; justify-content: space-between; gap: 30px; margin-bottom: 74px; padding: 42px 48px; border: 1px solid #cddafa; border-radius: 23px; background: linear-gradient(110deg, #eff5ff, #f7f3ff); }
.cta-section .eyebrow { margin-bottom: 8px; }
.cta-section h2 { margin: 0; font-size: clamp(1.65rem, 3vw, 2.5rem); letter-spacing: -.06em; }
.footer { display: flex; justify-content: space-between; gap: 20px; padding-top: 23px; padding-bottom: 28px; color: var(--muted); border-top: 1px solid var(--line); font-family: var(--mono); font-size: .63rem; }
.nav-active { color: var(--blue-dark) !important; background: #eef4ff; }
.section-action { margin-top: 28px; text-align: center; }
.text-link { color: var(--blue-dark); font-family: var(--mono); font-size: .72rem; font-weight: 500; }
.text-link:hover { text-decoration: underline; }
.text-link span { margin-left: 5px; }
.task-index { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; }
.type-chip { display: inline-flex; align-items: center; padding: 3px 6px; border-radius: 5px; font-family: var(--mono); font-size: .56rem; letter-spacing: .035em; line-height: 1.2; }
.type-implementation { color: #2168d7; background: #edf4ff; }
.type-optimization { color: #7751d8; background: #f0edff; }
.type-repair { color: #008b76; background: #e7faf7; }
.type-chip-dark { color: #63d9dd; background: rgba(99,217,221,.15); }

/* ---------- Motivation / What / How ---------- */
.reason-grid, .construction-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.reason-card, .construction-card { padding: 25px; border: 1px solid var(--line); border-radius: 17px; background: var(--white); }
.reason-card { min-height: 215px; }
.reason-number { display: inline-flex; align-items: center; justify-content: center; width: 31px; height: 31px; margin-bottom: 37px; color: var(--blue-dark); border-radius: 8px; background: #edf4ff; font-family: var(--mono); font-size: .65rem; }
.reason-card:nth-child(2) .reason-number { color: var(--violet); background: #f0edff; }
.reason-card:nth-child(3) .reason-number { color: var(--teal); background: #e7faf7; }
.reason-card h3, .construction-card h3 { margin-bottom: 8px; font-size: 1rem; letter-spacing: -.035em; }
.reason-card p, .construction-card p { margin: 0; color: var(--muted); font-size: .79rem; line-height: 1.58; }
.statement-card { display: flex; align-items: center; justify-content: space-between; gap: 30px; margin-top: 16px; padding: 27px 30px; border-radius: 17px; background: var(--ink); }
.statement-label { color: var(--cyan); font-family: var(--mono); font-size: .62rem; letter-spacing: .11em; }
.statement-card p { max-width: 650px; margin: 0; color: var(--white); font-size: 1.12rem; font-weight: 700; letter-spacing: -.035em; }
.what-grid { display: grid; grid-template-columns: 1fr .75fr; gap: 88px; align-items: center; }
.what-copy { max-width: 560px; color: var(--muted); font-size: .94rem; }
.what-copy .lead { color: var(--ink-soft); font-size: 1.1rem; line-height: 1.6; }
.principle-large { margin: 0; min-height: 185px; display: flex; flex-direction: column; justify-content: center; }
.principle-large p { font-size: 1.28rem; line-height: 1.45; }
.principle-large strong { color: var(--blue-dark); }
.loop-strip { display: grid; grid-template-columns: 1fr 32px 1fr 32px 1fr 32px 1fr; align-items: center; gap: 10px; margin-top: 48px; padding: 18px; border: 1px solid var(--line); border-radius: 15px; background: var(--white); }
.loop-strip > div { display: grid; grid-template-columns: 30px 1fr; column-gap: 9px; align-items: baseline; }
.loop-strip > div span { grid-row: span 2; color: var(--blue); font-family: var(--mono); font-size: .62rem; }
.loop-strip > div b { font-size: .78rem; }
.loop-strip > div small { color: var(--muted); font-family: var(--mono); font-size: .55rem; line-height: 1.35; }
.loop-strip i { color: var(--blue); font-size: 1.1rem; font-style: normal; text-align: center; }
.loop-final b { color: var(--blue-dark); }
.construction-card { min-height: 235px; }
.construction-icon { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; margin-bottom: 24px; color: var(--white); border-radius: 11px; background: var(--blue); font-size: 1.1rem; font-weight: 800; }
.construction-card:nth-child(2) .construction-icon { background: var(--violet); }
.construction-card:nth-child(3) .construction-icon { background: var(--teal); }
.construction-label { display: block; margin-bottom: 8px; color: var(--muted); font-family: var(--mono); font-size: .68rem; letter-spacing: .075em; }
.construction-note { margin-top: 20px; color: var(--muted); font-family: var(--mono); font-size: .7rem; }

/* ---------- Task cards / setting / results ---------- */
.task-grid-six { grid-template-columns: repeat(3, 1fr); }
.task-card { display: flex; flex-direction: column; }
.task-card h3 { margin-top: 0; }
.task-card .task-tag { margin-top: auto; display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.task-card .task-tag b { font-size: .85rem; font-weight: 400; }
.setting-strip { display: flex; flex-wrap: wrap; align-items: center; gap: 11px; margin-top: 32px; padding: 15px 18px; color: var(--muted); border: 1px solid var(--line); border-radius: 11px; font-family: var(--mono); font-size: .7rem; }
.setting-label { color: var(--blue-dark); letter-spacing: .08em; }
.setting-strip i { color: #aab8c8; font-style: normal; }
.results-section { padding-bottom: 118px; }
.results-panel { overflow: hidden; border: 1px solid #30465e; border-radius: 18px; background: #0c2037; }
.results-panel-head { display: flex; justify-content: space-between; padding: 14px 18px; color: #8da2bb; border-bottom: 1px solid #30465e; font-family: var(--mono); font-size: .7rem; letter-spacing: .075em; }
.results-status { color: #63d9dd; letter-spacing: .02em; text-transform: lowercase; }
.results-empty { display: flex; flex-direction: column; align-items: center; padding: 64px 24px 70px; text-align: center; }
.empty-mark { display: flex; align-items: center; justify-content: center; width: 48px; height: 48px; margin-bottom: 19px; color: var(--cyan); border: 1px solid #356078; border-radius: 14px; font-size: 1.35rem; }
.results-empty h3 { margin-bottom: 8px; color: var(--white); font-size: 1.05rem; }
.results-empty p { max-width: 475px; margin-bottom: 24px; color: #9fb1c7; font-size: .87rem; }
.button-light { color: var(--ink); background: var(--white); }
.button-light:hover { color: var(--ink); background: #e8faff; }

/* ---------- Task catalog page ---------- */
.catalog-hero { border-bottom: 1px solid var(--line); background: radial-gradient(850px 320px at 10% 0%, rgba(7,181,201,.1), transparent 60%), radial-gradient(850px 320px at 95% 0%, rgba(118,87,245,.12), transparent 60%), var(--paper); }
.catalog-hero-inner { padding-top: 78px; padding-bottom: 67px; }
.catalog-hero h1 { max-width: 700px; margin-bottom: 17px; font-size: clamp(2.75rem, 6vw, 4.9rem); }
.catalog-hero h1 em { color: var(--blue); font-style: normal; }
.catalog-hero-inner > p:not(.eyebrow) { max-width: 630px; margin-bottom: 23px; color: var(--muted); font-size: 1rem; }
.catalog-meta { display: flex; flex-wrap: wrap; gap: 9px; color: var(--muted); font-family: var(--mono); font-size: .7rem; }
.catalog-meta i { color: #aab8c8; font-style: normal; }
.catalog-section { padding-top: 91px; padding-bottom: 82px; }
.catalog-intro { display: grid; grid-template-columns: 1fr .7fr; gap: 80px; align-items: end; margin-bottom: 42px; }
.catalog-intro h2, .detail-section-heading h2, .catalog-cta h2 { margin-bottom: 0; font-size: clamp(2rem, 4vw, 3.1rem); line-height: 1.08; letter-spacing: -.06em; }
.catalog-intro > p { max-width: 445px; margin: 0 0 4px; color: var(--muted); font-size: .98rem; }
.catalog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
.catalog-card { display: flex; min-height: 245px; flex-direction: column; padding: 23px; border: 1px solid var(--line); border-radius: 16px; background: var(--white); transition: transform .18s, box-shadow .18s, border-color .18s; }
.catalog-card:hover { transform: translateY(-4px); border-color: #adc6ef; box-shadow: var(--shadow); }
.catalog-card-id { color: var(--muted); font-family: var(--mono); font-size: .67rem; letter-spacing: .07em; }
.catalog-card-icon { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; margin: 27px 0 16px; color: var(--white); border-radius: 11px; background: var(--blue); font-size: 1rem; font-weight: 800; }
.catalog-card.task-violet .catalog-card-icon { background: var(--violet); }
.catalog-card.task-teal .catalog-card-icon { background: var(--teal); }
.catalog-card.task-orange .catalog-card-icon { background: var(--orange); }
.catalog-card.task-pink .catalog-card-icon { background: var(--pink); }
.catalog-card h3 { margin-bottom: 7px; font-size: 1rem; letter-spacing: -.035em; }
.catalog-card p { margin-bottom: 17px; color: var(--muted); font-size: .83rem; line-height: 1.55; }
.catalog-card > span:last-child { margin-top: auto; color: var(--blue-dark); font-family: var(--mono); font-size: .69rem; }
.catalog-card-dark { color: var(--white); border-color: var(--ink); background: var(--ink); }
.catalog-card-dark .catalog-card-id, .catalog-card-dark p { color: #9fb1c7; }
.catalog-card-dark .catalog-card-icon { color: var(--ink); background: var(--cyan); }
.catalog-card-dark > span:last-child { color: #63d9dd; }
.task-type-strip { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 11px; margin: -13px 0 27px; color: var(--muted); font-family: var(--mono); font-size: .7rem; }
.task-type-strip .type-chip { margin-left: 10px; }
.task-type-strip .type-chip:first-child { margin-left: 0; }
.detail-section { padding-top: 85px; padding-bottom: 96px; }
.detail-section-heading { margin-bottom: 37px; }
.task-detail { display: grid; grid-template-columns: 62px 1fr auto; gap: 25px; align-items: start; margin-top: 15px; padding: 30px 31px; border: 1px solid var(--line); border-left: 4px solid var(--blue); border-radius: 17px; background: var(--white); scroll-margin-top: 86px; }
.task-detail.task-violet { border-left-color: var(--violet); }
.task-detail.task-teal { border-left-color: var(--teal); }
.task-detail.task-orange { border-left-color: var(--orange); }
.task-detail.task-pink { border-left-color: var(--pink); }
.task-dark-detail { color: var(--white); border-color: var(--ink); background: var(--ink); }
.detail-number { color: var(--blue); font-family: var(--mono); font-size: .77rem; }
.task-dark-detail .detail-number { color: var(--cyan); }
.detail-kicker { margin-bottom: 10px; color: var(--muted); font-family: var(--mono); font-size: .68rem; letter-spacing: .07em; }
.task-dark-detail .detail-kicker { color: #9fb1c7; }
.detail-main h3 { margin-bottom: 10px; font-size: 1.45rem; letter-spacing: -.05em; }
.detail-lede { max-width: 780px; margin-bottom: 23px; color: var(--ink-soft); font-size: .96rem; }
.task-dark-detail .detail-lede { color: #d3e0ed; }
.detail-columns { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 35px; padding-top: 19px; border-top: 1px solid var(--line); }
.task-dark-detail .detail-columns { border-top-color: #30465e; }
.detail-columns b { display: block; margin-bottom: 5px; color: var(--blue-dark); font-family: var(--mono); font-size: .68rem; letter-spacing: .045em; text-transform: uppercase; }
.task-dark-detail .detail-columns b { color: #63d9dd; }
.detail-columns p { margin: 0; color: var(--muted); font-size: .83rem; line-height: 1.58; }
.task-dark-detail .detail-columns p { color: #9fb1c7; }
.detail-facts { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 9px; margin-bottom: 24px; }
.detail-facts > div { min-width: 0; padding: 11px 12px; border: 1px solid #e5ebf3; border-radius: 8px; background: #f8fafc; }
.task-dark-detail .detail-facts > div { border-color: #30465e; background: #0c2037; }
.detail-facts span, .detail-facts b { display: block; }
.detail-facts span { margin-bottom: 4px; color: var(--muted); font-family: var(--mono); font-size: .62rem; letter-spacing: .035em; text-transform: uppercase; }
.detail-facts b { overflow-wrap: anywhere; color: var(--ink-soft); font-size: .74rem; line-height: 1.35; }
.task-dark-detail .detail-facts b { color: #d3e0ed; }
.detail-note { margin-top: 20px; padding: 12px 14px; color: var(--muted); border-radius: 8px; background: #f4f7fb; font-size: .8rem; line-height: 1.58; }
.detail-note code { color: var(--blue-dark); font-family: var(--mono); font-size: .72rem; }
.detail-note strong { color: var(--ink-soft); }
.task-dark-detail .detail-note { color: #9fb1c7; background: #102943; }
.task-dark-detail .detail-note code, .task-dark-detail .detail-note strong { color: #63d9dd; }
.detail-top { align-self: end; color: var(--muted); font-family: var(--mono); font-size: .68rem; white-space: nowrap; }
.detail-top:hover { color: var(--blue-dark); }
.catalog-cta { display: flex; align-items: center; justify-content: space-between; gap: 30px; margin-bottom: 75px; padding: 38px 45px; border: 1px solid #cddafa; border-radius: 23px; background: linear-gradient(110deg, #eff5ff, #f7f3ff); }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 34px; padding-top: 60px; }
  .hero-visual { min-height: 430px; max-width: 660px; }
  .overview-grid, .evaluation-layout, .submission-layout { grid-template-columns: 1fr; gap: 44px; }
  .split-heading { grid-template-columns: 1fr; gap: 13px; align-items: start; }
  .task-grid { grid-template-columns: repeat(2, 1fr); }
  .submission-layout { max-width: 680px; }
  .reason-grid, .construction-grid, .catalog-grid { grid-template-columns: repeat(2, 1fr); }
  .what-grid, .catalog-intro { grid-template-columns: 1fr; gap: 35px; }
  .loop-strip { grid-template-columns: 1fr 24px 1fr; }
  .loop-strip i:nth-of-type(2) { display: none; }
  .loop-strip > div:nth-of-type(3) { grid-column: 1; }
  .loop-strip > div:nth-of-type(4) { grid-column: 3; }
  .task-detail { grid-template-columns: 44px 1fr; }
  .detail-top { grid-column: 2; justify-self: start; }
  .detail-facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 680px) {
  .section-shell { width: min(100% - 32px, 1160px); }
  .topbar { padding: 13px 16px; }
  .menu-toggle { display: flex; flex-direction: column; gap: 4px; padding: 8px; }
  .menu-toggle > span:not(.sr-only) { width: 21px; height: 2px; background: var(--ink); border-radius: 2px; }
  .site-nav { position: absolute; top: 61px; right: 16px; left: 16px; display: none; flex-direction: column; align-items: stretch; padding: 10px; border: 1px solid var(--line); border-radius: 13px; background: rgba(255,255,255,.96); box-shadow: var(--shadow); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 10px 12px; }
  .site-nav .nav-button { margin: 5px 0 0; text-align: center; }
  .hero { min-height: auto; padding-top: 53px; padding-bottom: 58px; }
  h1 { font-size: clamp(2.6rem, 13vw, 4rem); }
  .hero-lede { font-size: .95rem; }
  .hero-visual { min-height: 435px; border-radius: 22px; transform: scale(.98); }
  .node-input { top: 75px; left: 18px; }
  .node-agent { top: 190px; left: calc(50% - 94px); }
  .node-output { right: 18px; bottom: 62px; }
  .arrow-one { top: 163px; left: calc(50% - 15px); }
  .arrow-two { right: calc(50% - 10px); bottom: 140px; }
  .signal-grid { grid-template-columns: repeat(2, 1fr); gap: 22px 10px; }
  .signal-item { align-items: flex-start; }
  .signal-item small { font-size: .62rem; }
  .content-section { padding-top: 80px; padding-bottom: 80px; }
  .section-heading { margin-bottom: 33px; }
  .section-heading h2, .dark-heading h2 { font-size: 2.15rem; }
  .overview-copy .lead { font-size: 1.04rem; }
  .task-grid, .resource-grid { grid-template-columns: 1fr; }
  .reason-grid, .construction-grid, .catalog-grid { grid-template-columns: 1fr; }
  .task-card { min-height: 220px; }
  .evaluation-layout { gap: 34px; }
  .evaluation-only .evaluation-list { grid-template-columns: 1fr; }
  .section-dark { padding-top: 80px; padding-bottom: 80px; }
  .submission-layout { gap: 31px; }
  .terminal-card pre { font-size: .71rem; }
  .cta-section { align-items: flex-start; flex-direction: column; margin-bottom: 48px; padding: 28px 24px; }
  .footer { align-items: flex-start; flex-direction: column; padding-bottom: 24px; font-size: .59rem; }
  .statement-card, .catalog-cta { align-items: flex-start; flex-direction: column; padding: 25px 23px; }
  .statement-card p { font-size: 1rem; }
  .loop-strip { grid-template-columns: 1fr; gap: 17px; }
  .loop-strip i { display: none; }
  .loop-strip > div:nth-of-type(3), .loop-strip > div:nth-of-type(4) { grid-column: auto; }
  .setting-strip { align-items: flex-start; flex-direction: column; gap: 6px; }
  .setting-strip i { display: none; }
  .catalog-hero-inner { padding-top: 54px; padding-bottom: 51px; }
  .catalog-section, .detail-section { padding-top: 70px; padding-bottom: 65px; }
  .task-detail { grid-template-columns: 1fr; gap: 12px; padding: 24px 21px; }
  .detail-top { grid-column: auto; }
  .detail-columns { grid-template-columns: 1fr; gap: 18px; }
  .detail-facts { grid-template-columns: 1fr; }
  .task-type-strip { align-items: flex-start; flex-direction: column; gap: 7px; }
  .task-type-strip .type-chip { margin-left: 0; }
}

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