*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

:root {
  --bg: oklch(0.965 0.009 115);
  --surface: oklch(0.99 0.005 115);
  --surface-strong: oklch(0.925 0.014 115);
  --ink: oklch(0.205 0.018 125);
  --muted: oklch(0.49 0.018 120);
  --faint: oklch(0.68 0.014 120);
  --line: oklch(0.83 0.018 115);
  --accent: oklch(0.55 0.205 260);
  --accent-hover: oklch(0.48 0.22 260);
  --accent-soft: oklch(0.91 0.055 260);
  --positive: oklch(0.54 0.13 155);
  --warning: oklch(0.64 0.16 65);
  --danger: oklch(0.57 0.17 25);
  --terminal: oklch(0.17 0.018 135);
  --terminal-ink: oklch(0.91 0.012 120);
  --shadow: 0 24px 70px oklch(0.18 0.03 130 / 0.14);
  --font: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "Geist Mono", "SFMono-Regular", Consolas, monospace;
  --page: 1240px;
  --ease: cubic-bezier(.16, 1, .3, 1);
}

:root[data-theme="dark"] {
  --bg: oklch(0.18 0.012 125);
  --surface: oklch(0.225 0.014 125);
  --surface-strong: oklch(0.27 0.018 125);
  --ink: oklch(0.93 0.01 115);
  --muted: oklch(0.69 0.015 120);
  --faint: oklch(0.52 0.014 120);
  --line: oklch(0.34 0.018 125);
  --accent: oklch(0.68 0.17 255);
  --accent-hover: oklch(0.75 0.14 250);
  --accent-soft: oklch(0.29 0.075 260);
  --positive: oklch(0.7 0.13 155);
  --warning: oklch(0.75 0.14 70);
  --danger: oklch(0.71 0.15 25);
  --terminal: oklch(0.125 0.012 130);
  --terminal-ink: oklch(0.9 0.012 120);
  --shadow: 0 24px 80px oklch(0.06 0.01 130 / 0.4);
}

html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body {
  min-width: 320px;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color 240ms var(--ease), color 240ms var(--ease);
}
body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: .18;
  content: "";
  mask-image: linear-gradient(to bottom, black, transparent 80vh);
}
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
code, pre { font-family: var(--mono); }
svg { display: block; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.8; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid color-mix(in oklch, var(--line) 75%, transparent);
  background: color-mix(in oklch, var(--bg) 88%, transparent);
  backdrop-filter: blur(18px);
}
.nav-shell, main, footer { width: min(calc(100% - 48px), var(--page)); margin-inline: auto; }
.nav-shell { min-height: 72px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 32px; }
.brand { display: inline-flex; align-items: center; width: max-content; font-weight: 650; letter-spacing: -.02em; }
.nav-links { display: flex; align-items: center; gap: 30px; color: var(--muted); font-size: 14px; font-weight: 500; }
.nav-links a, footer a, .text-link { transition: color 180ms var(--ease); }
.nav-links a:hover, footer a:hover, .text-link:hover { color: var(--accent); }
.nav-actions { display: flex; justify-content: flex-end; align-items: center; gap: 10px; }
.theme-toggle, .github-link { min-height: 40px; border: 1px solid var(--line); background: var(--surface); }
.theme-toggle { display: grid; width: 40px; place-items: center; cursor: pointer; }
.theme-toggle svg { width: 17px; height: 17px; }
.theme-toggle .sun-icon, [data-theme="dark"] .theme-toggle .moon-icon { display: none; }
[data-theme="dark"] .theme-toggle .sun-icon { display: block; }
.github-link { display: flex; align-items: center; gap: 8px; padding: 0 15px; font-size: 14px; font-weight: 600; }
.github-link svg { width: 17px; height: 17px; fill: currentColor; stroke: none; }
.theme-toggle:hover, .github-link:hover { border-color: var(--ink); }

.hero { min-height: calc(100vh - 72px); display: grid; grid-template-columns: minmax(0, .88fr) minmax(520px, 1.12fr); align-items: center; gap: clamp(48px, 7vw, 112px); padding-block: clamp(80px, 10vw, 150px); }
.eyebrow, .section-index { font-family: var(--mono); font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }
.eyebrow { margin-bottom: 28px; color: var(--muted); }
.eyebrow span { color: var(--accent); }
.hero h1 { max-width: 720px; font-size: clamp(3.6rem, 6.2vw, 6.7rem); font-weight: 650; letter-spacing: -.07em; line-height: .92; text-wrap: balance; }
.hero-lede { max-width: 610px; margin-top: 32px; color: var(--muted); font-size: clamp(17px, 1.6vw, 20px); line-height: 1.55; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 38px; }
.button { min-height: 50px; display: inline-flex; align-items: center; justify-content: center; gap: 22px; padding: 0 20px; border: 1px solid var(--line); font-size: 14px; font-weight: 600; transition: transform 180ms var(--ease), background 180ms var(--ease), border-color 180ms var(--ease); }
.button:hover { transform: translateY(-2px); }
.button-primary { border-color: var(--accent); background: var(--accent); color: oklch(.98 .005 250); }
.button-primary:hover { border-color: var(--accent-hover); background: var(--accent-hover); }
.button-secondary { background: var(--surface); }
.button-secondary:hover { border-color: var(--ink); }
.hero-facts { display: flex; gap: clamp(24px, 4vw, 54px); margin-top: 52px; padding: 26px 0 0; border-top: 1px solid var(--line); list-style: none; }
.hero-facts li { display: grid; gap: 1px; }
.hero-facts strong { font-family: var(--mono); font-size: 20px; line-height: 1.2; }
.hero-facts span { color: var(--muted); font-size: 12px; }

.cli-preview { overflow: hidden; border: 1px solid oklch(.32 .015 130); background: var(--terminal); color: var(--terminal-ink); box-shadow: var(--shadow); transform: rotate(1deg); }
.cli-preview-bar, .cli-preview-status { display: flex; align-items: center; justify-content: space-between; padding-inline: 20px; font-family: var(--mono); font-size: 10px; }
.cli-preview-bar { height: 52px; border-bottom: 1px solid oklch(.32 .015 130); color: oklch(.62 .015 125); }
.cli-preview-bar span:first-child::before { margin-right: 9px; color: var(--positive); content: "●"; }
.cli-preview pre { overflow-x: auto; padding: clamp(24px, 4vw, 42px); font-size: clamp(10px, 1.05vw, 13px); line-height: 1.75; }
.cli-comment { color: oklch(.58 .02 130); }
.cli-prompt { color: oklch(.72 .16 155); }
.cli-string { color: oklch(.79 .12 78); }
.cli-output { color: oklch(.72 .1 250); }
.cli-preview-status { min-height: 48px; border-top: 1px solid oklch(.32 .015 130); color: oklch(.62 .015 125); }
.cli-preview-status span:first-child { display: flex; align-items: center; gap: 8px; }
.cli-preview-status i { width: 6px; height: 6px; border-radius: 50%; background: var(--positive); }

.install-strip { display: grid; grid-template-columns: .75fr 1.25fr; gap: 14px 60px; align-items: end; padding-block: 54px; border-block: 1px solid var(--line); }
.section-index { margin-bottom: 13px; color: var(--accent); }
.install-strip h2, .section-heading h2 { font-size: clamp(2rem, 4vw, 4.2rem); font-weight: 600; letter-spacing: -.055em; line-height: 1.02; text-wrap: balance; }
.install-command { min-width: 0; display: flex; align-items: center; border: 1px solid var(--line); background: var(--surface); }
.install-command code { min-width: 0; overflow: hidden; padding: 18px; color: var(--muted); font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }
.copy-button { align-self: stretch; flex: 0 0 74px; border: 0; border-left: 1px solid var(--line); background: transparent; cursor: pointer; font-family: var(--mono); font-size: 11px; font-weight: 600; text-transform: uppercase; }
.copy-button:hover { background: var(--accent-soft); color: var(--accent); }
.install-note { grid-column: 2; color: var(--muted); font-size: 13px; }
.install-note a { border-bottom: 1px solid var(--line); color: var(--ink); }

.section { padding-block: clamp(100px, 13vw, 180px); border-bottom: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: 1fr minmax(300px, 2fr); gap: 18px clamp(40px, 8vw, 120px); margin-bottom: clamp(56px, 8vw, 100px); }
.section-heading .section-index { grid-row: span 2; }
.section-heading > p:last-child { max-width: 570px; color: var(--muted); font-size: 18px; }

.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.feature-list article { min-height: 280px; padding: clamp(24px, 3vw, 40px); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: background 220ms var(--ease); }
.feature-list article:hover { background: var(--surface); }
.feature-number { display: block; margin-bottom: 64px; color: var(--faint); font-family: var(--mono); font-size: 11px; }
.feature-list h3 { margin-bottom: 12px; font-size: 18px; letter-spacing: -.025em; }
.feature-list p { max-width: 33ch; color: var(--muted); font-size: 14px; }
.feature-list code { color: var(--ink); font-size: .88em; }

.workflow-grid { display: grid; grid-template-columns: .72fr 1.28fr; gap: clamp(50px, 8vw, 120px); align-items: start; }
.workflow-steps { padding: 0; border-top: 1px solid var(--ink); list-style: none; }
.workflow-steps li { display: grid; grid-template-columns: 42px 1fr; gap: 16px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.workflow-steps li > span { padding-top: 4px; color: var(--accent); font-family: var(--mono); font-size: 10px; font-weight: 600; line-height: 1; }
.workflow-steps h3 { font-size: 18px; letter-spacing: -.02em; }
.workflow-steps p { max-width: 29ch; margin-top: 5px; color: var(--muted); font-size: 14px; line-height: 1.5; }
.terminal { overflow: hidden; background: var(--terminal); color: var(--terminal-ink); box-shadow: var(--shadow); }
.terminal-bar { height: 48px; display: flex; align-items: center; gap: 7px; padding: 0 17px; border-bottom: 1px solid oklch(.38 .01 130); }
.terminal-bar span { width: 8px; height: 8px; border-radius: 50%; background: oklch(.42 .01 130); }
.terminal-bar b { margin-left: 7px; color: oklch(.66 .012 120); font-family: var(--mono); font-size: 10px; font-weight: 500; }
.terminal pre { overflow-x: auto; padding: clamp(24px, 4vw, 46px); font-size: clamp(11px, 1.15vw, 14px); line-height: 1.85; }
.terminal .comment { color: oklch(.58 .02 130); }
.terminal .prompt { color: oklch(.72 .16 155); }
.terminal .string { color: oklch(.79 .12 78); }
.state-flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr; align-items: center; margin-top: 90px; }
.state-flow div { padding: 21px; border: 1px solid var(--line); background: var(--surface); }
.state-flow span { display: block; color: var(--faint); font-family: var(--mono); font-size: 10px; }
.state-flow strong { font-family: var(--mono); font-size: 12px; }
.state-flow i { padding: 0 13px; color: var(--faint); font-style: normal; }
.state-flow .state-active { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.state-flow .state-done { border-color: var(--positive); color: var(--positive); }

.command-list { border-top: 1px solid var(--ink); }
.command-head, .command-row { display: grid; grid-template-columns: minmax(300px, 1.4fr) minmax(120px, .45fr) minmax(250px, 1fr); gap: 30px; align-items: center; }
.command-head { padding: 14px 18px; color: var(--faint); font-family: var(--mono); font-size: 10px; text-transform: uppercase; letter-spacing: .08em; }
.command-row { min-height: 72px; padding: 16px 18px; border-top: 1px solid var(--line); transition: background 160ms var(--ease); }
.command-row:hover { background: var(--surface); }
.command-row code { color: var(--ink); font-size: 12px; overflow-wrap: anywhere; }

.command-row > span { color: var(--accent); font-family: var(--mono); font-size: 11px; }
.command-row p { color: var(--muted); font-size: 13px; }

.fit-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: clamp(30px, 5vw, 70px); }
.fit-copy p { max-width: 32ch; color: var(--muted); font-size: 19px; }
.fit-copy strong { color: var(--ink); }
.text-link { display: inline-block; margin-top: 30px; border-bottom: 1px solid currentColor; color: var(--accent); font-size: 14px; font-weight: 600; }
.fit-list { padding-top: 20px; border-top: 2px solid var(--line); }
.fit-list h3 { display: flex; gap: 9px; margin-bottom: 22px; font-size: 15px; }
.fit-list ul { padding: 0; list-style: none; }
.fit-list li { padding-block: 10px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.fit-good { border-color: var(--positive); }
.fit-good h3 span { color: var(--positive); }
.fit-bad { border-color: var(--danger); }
.fit-bad h3 span { color: var(--danger); }

.closing { padding-block: clamp(110px, 16vw, 220px); text-align: center; }
.closing h2 { font-size: clamp(3.5rem, 8vw, 8.5rem); font-weight: 650; letter-spacing: -.075em; line-height: .88; }
.closing .hero-actions { justify-content: center; }
footer { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 30px; padding-block: 35px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
footer p:last-child { justify-self: end; }

:focus-visible { outline: 3px solid color-mix(in oklch, var(--accent) 60%, transparent); outline-offset: 3px; }

@media (max-width: 1050px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-copy { max-width: 760px; }
  .cli-preview { width: min(100%, 760px); transform: none; }
  .feature-list { grid-template-columns: repeat(2, 1fr); }
  .workflow-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .nav-shell, main, footer { width: min(calc(100% - 30px), var(--page)); }
  .nav-shell { grid-template-columns: 1fr auto; min-height: 62px; }
  .nav-links { display: none; }
  .github-link span { display: none; }
  .github-link { width: 40px; justify-content: center; padding: 0; }
  .hero { padding-block: 72px 90px; }
  .hero h1 { font-size: clamp(3rem, 15vw, 5.2rem); }
  .hero-lede { margin-top: 25px; font-size: 17px; }
  .hero-facts { justify-content: space-between; gap: 15px; }
  .install-strip { grid-template-columns: 1fr; align-items: start; }
  .install-note { grid-column: 1; }
  .section-heading { grid-template-columns: 1fr; }
  .section-heading .section-index { grid-row: auto; }
  .section-heading h2 { font-size: clamp(2.5rem, 12vw, 4rem); }
  .feature-list, .fit-grid { grid-template-columns: 1fr; }
  .feature-list article { min-height: 230px; }
  .feature-number { margin-bottom: 44px; }
  .state-flow { grid-template-columns: 1fr; gap: 8px; margin-top: 60px; }
  .state-flow i { padding: 0; text-align: center; transform: rotate(90deg); }
  .command-head { display: none; }
  .command-row { grid-template-columns: 1fr auto; gap: 6px 16px; padding: 20px 5px; }
  .command-row p { grid-column: 1 / -1; }
  .fit-grid { gap: 50px; }
  .closing { text-align: left; }
  .closing .hero-actions { justify-content: flex-start; }
  footer { grid-template-columns: 1fr; }
  footer p:last-child { justify-self: start; }
}

@media (max-width: 440px) {
  .hero-actions .button { width: 100%; }
  .hero-facts span { max-width: 80px; }
  .cli-preview { margin-inline: -8px; width: calc(100% + 16px); }
  .install-command { align-items: stretch; }
  .install-command code { padding: 15px 12px; }
  .copy-button { flex-basis: 62px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

/* Problem section */
.problem-split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 8vw, 120px); align-items: start; }
.infra-list { margin-top: 20px; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.infra-list li { padding: 10px 0; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 14px; font-family: var(--mono); }
.infra-list li::before { content: "—  "; color: var(--faint); }
.infra-verdict { margin-top: 20px; color: var(--muted); font-size: 14px; }
.approach-callout { padding: clamp(28px, 4vw, 48px); border: 1px solid var(--line); background: var(--surface); }
.approach-label { margin-bottom: 16px; color: var(--accent); font-family: var(--mono); font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }
.approach-statement { margin-bottom: 16px; font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 650; letter-spacing: -.04em; line-height: 1.1; }
.approach-callout > p:last-child { color: var(--muted); font-size: 16px; }

/* Architecture terminal */
.arch-terminal { margin-top: clamp(50px, 8vw, 90px); overflow: hidden; background: var(--terminal); color: var(--terminal-ink); box-shadow: var(--shadow); }
.arch-diagram-wrap { display: flex; justify-content: center; padding: clamp(32px, 5vw, 60px) clamp(24px, 4vw, 46px) clamp(24px, 4vw, 46px); }
.arch-terminal pre { overflow-x: auto; padding: 0; font-size: clamp(11px, 1.15vw, 14px); line-height: 1.9; }
.arch-db { color: oklch(.72 .1 250); font-weight: 600; }
.arch-agent { color: oklch(.9 .01 120); }
.arch-cmd { color: oklch(.72 .16 155); }
.arch-caption { padding: clamp(16px, 2.5vw, 24px) clamp(24px, 4vw, 46px); border-top: 1px solid oklch(.32 .015 130); color: oklch(.52 .015 125); font-family: var(--mono); font-size: clamp(11px, 1vw, 13px); text-align: center; }

/* Not-a-framework strip */
.no-framework { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 8vw, 120px); align-items: start; margin-bottom: clamp(56px, 8vw, 100px); padding-bottom: clamp(56px, 8vw, 100px); border-bottom: 1px solid var(--line); }
.no-framework-left h3 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 650; letter-spacing: -.04em; line-height: 1.1; margin-bottom: 16px; }
.no-framework-left p { color: var(--muted); font-size: 16px; max-width: 40ch; }
.no-framework-list { padding: 0; border-top: 1px solid var(--line); list-style: none; align-self: start; }
.no-framework-list li { display: flex; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.no-framework-list li span { color: var(--danger); font-weight: 600; }

/* Closing analogy */
.closing-analogy { max-width: 52ch; margin: 0 auto clamp(32px, 5vw, 56px); color: var(--muted); font-size: clamp(16px, 1.8vw, 20px); line-height: 1.55; }
.closing-analogy em { color: var(--ink); font-style: normal; font-weight: 600; }

/* Skills section */
.skills-role-list { margin-bottom: clamp(56px, 8vw, 100px); }
.skills-role-list .command-row code { min-width: 100px; font-weight: 600; }
.skills-role-list .command-row span { white-space: pre-wrap; word-break: break-word; }
.skills-prose { display: grid; gap: 16px; }
.skills-label { color: var(--accent); font-family: var(--mono); font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }
.skills-prose p:last-child { max-width: 65ch; color: var(--muted); font-size: 16px; line-height: 1.6; }

/* Hooks section */
.hooks-detail { margin-top: clamp(56px, 8vw, 100px); }
.hooks-detail > p { margin-bottom: 32px; color: var(--muted); font-size: 16px; line-height: 1.6; }
.hooks-detail .terminal { width: 100%; }
.hooks-detail .terminal pre { padding: clamp(24px, 4vw, 40px); font-size: clamp(11px, 1.15vw, 14px); line-height: 1.85; }

@media (max-width: 760px) {
  .problem-split, .no-framework { grid-template-columns: 1fr; }
  .closing-analogy { margin-inline: 0; }
}