/* ai-devkit portal — design system. Dark-first, with a light theme. Dark: bg #121212,
   surfaces #272727/#303030, signal teal #3FD9C0, white/60% text. Light: warm off-white with a
   deeper teal (#0C7A6F) for text/links so the accent reads with contrast. Signal teal
   (#3FD9C0) stays the FILL color (buttons/chips) in both. Toggle in the nav. */
:root {
  /* dark (default) */
  --bg: #121212;
  --surface: #1b1b1b;
  --surface-2: #272727;
  --surface-3: #303030;
  --text: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.6);
  --text-tertiary: rgba(255, 255, 255, 0.38);
  --accent: #3fd9c0;            /* signal teal — fills (buttons, chips, badges) */
  --accent-strong: #2bb7a3;
  --accent-soft: rgba(63, 217, 192, 0.12);
  --accent-text: #3fd9c0;       /* teal as text/links (varies per theme for contrast) */
  --border: #3a3a3a;
  --border-strong: #4e4e4e;
  --nav-bg: rgba(18, 18, 18, 0.82);
  --hero-from: #8af0de; --hero-via: #3fd9c0; --hero-to: #2bb7a3;
  --code-inline: #b6ece2;
  --code-inline-bg: var(--surface-2);
  --green: #86e70b;
  --red: #ef6a42;
  --blue: #5b8def;
  /* constant across themes — code blocks stay dark (readable on both) */
  --code-bg: #0d0d0d;
  --code-text: #e6e6e6;
  --radius: 10px;
  --radius-sm: 6px;
  --pad: 16px;
  --maxw: 1080px;
  --font: 'GT America', -apple-system, BlinkMacSystemFont, 'Segoe UI', Inter, Helvetica, Arial, sans-serif;
  --mono: 'SF Mono', ui-monospace, 'JetBrains Mono', Menlo, Consolas, monospace;
}

:root[data-theme="light"] {
  --bg: #faf8f2;
  --surface: #ffffff;
  --surface-2: #f2ecdf;
  --surface-3: #e9e2d2;
  --text: #1a1712;
  --text-secondary: rgba(26, 23, 18, 0.62);
  --text-tertiary: rgba(26, 23, 18, 0.55);
  --accent: #3fd9c0;            /* keep signal teal as fill */
  --accent-strong: #2bb7a3;
  --accent-soft: rgba(20, 160, 142, 0.14);
  --accent-text: #0c7a6f;       /* deeper teal for legible links/headings on light */
  --border: #e6ddc9;
  --border-strong: #d4c9ab;
  --nav-bg: rgba(250, 248, 242, 0.85);
  --hero-from: #0f8d7f; --hero-via: #0c7a6f; --hero-to: #0a5f56;
  --code-inline: #0b6f64;
  --code-inline-bg: #dff0ec;
  --green: #3f7a04;
  --red: #c2451d;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background .2s, color .2s;
}
a { color: var(--accent-text); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Visible keyboard focus (M4) */
:where(a,button,summary,.card,.flow-node,.chip,.theme-toggle):focus-visible{outline:2px solid var(--accent-text);outline-offset:2px;border-radius:var(--radius-sm);}
.card:focus-visible,a.flow-node:focus-visible{border-color:var(--accent);}
details.fold>summary:focus-visible{outline-offset:-2px;}

/* Skip link + main landmark */
.skip{position:absolute;left:-9999px;}
.skip:focus{position:fixed;left:12px;top:12px;z-index:30;background:var(--accent);color:#062722;padding:8px 14px;border-radius:var(--radius-sm);}

/* Inline-only padding: using physical `padding: 0 24px` here zeroed the vertical padding of any
   element that also carries a vertical-padding class (e.g. `section.container`, `.container.content`),
   because the shorthand set top/bottom to 0. padding-inline composes cleanly with block padding. */
.container { max-width: var(--maxw); margin: 0 auto; padding-inline: 24px; }

/* Top nav */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: var(--nav-bg);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; gap: 28px; height: 60px; }
.brand { font-weight: 600; font-size: 17px; letter-spacing: 0.2px; color: var(--text); }
.brand .dot { color: var(--accent-text); }
.nav a.link { color: var(--text-secondary); font-size: 14px; }
.nav a.link:hover, .nav a.link.active { color: var(--text); text-decoration: none; }
.nav .spacer { flex: 1; }
.theme-toggle {
  cursor: pointer; width: 32px; height: 32px; border-radius: 999px;
  border: 1px solid var(--border-strong); background: transparent; color: var(--text-secondary);
  font-size: 15px; line-height: 1; display: inline-flex; align-items: center; justify-content: center;
}
.theme-toggle:hover { color: var(--text); border-color: var(--accent-text); }

/* Hero */
.hero { padding: 72px 0 40px; border-bottom: 1px solid var(--border); }
.hero h1 {
  font-size: 44px; line-height: 1.1; margin: 0 0 16px; font-weight: 600; letter-spacing: -0.5px;
  color: var(--hero-to); /* fallback if background-clip:text is unsupported */
  background: linear-gradient(120deg, var(--hero-from), var(--hero-via) 45%, var(--hero-to));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
@media (forced-colors: active) { .hero h1 { -webkit-text-fill-color: revert; background: none; } }
.hero p { font-size: 18px; color: var(--text-secondary); max-width: 720px; margin: 0 0 12px; }
.kicker { color: var(--accent-text); font-size: 13px; letter-spacing: 1.6px; text-transform: uppercase; margin-bottom: 14px; }

/* Sections */
section { padding-block: 44px; }   /* block-only so it composes with .container's inline padding */
h2 { font-size: 24px; margin: 0 0 18px; font-weight: 600; letter-spacing: -0.2px; }
h3 { font-size: 18px; margin: 28px 0 10px; font-weight: 600; }
.muted { color: var(--text-secondary); }

/* Section permalinks — a hover "#" beside headings + scroll offset so the sticky nav doesn't cover the target */
:where(h2,h3,h4)[id], section[id] { scroll-margin-top: 80px; }
.anchor { margin-left: 8px; font-weight: 400; font-size: .82em; color: var(--text-tertiary); text-decoration: none; opacity: 0; transition: opacity .12s, color .12s; }
:where(h2,h3,h4):hover > .anchor, :where(h2,h3,h4):focus-within > .anchor, .anchor:focus-visible { opacity: 1; }
.anchor:hover { color: var(--accent-text); text-decoration: none; }
@media (hover: none) { .anchor { opacity: .5; } }   /* touch devices can't hover — keep anchors discoverable */

/* Cards / catalog grid */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; transition: border-color .15s, transform .15s, background .15s; display: block;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); background: var(--surface-2); text-decoration: none; }
.card h3 { margin: 0 0 6px; font-size: 17px; color: var(--text); }
.card p { margin: 0 0 14px; color: var(--text-secondary); font-size: 14px; }
.card .row { display: flex; flex-wrap: wrap; gap: 6px; }

/* Badges / chips */
.badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11px; font-weight: 500; padding: 3px 9px; border-radius: 999px;
  border: 1px solid var(--border-strong); color: var(--text-secondary); background: var(--surface-2);
  letter-spacing: .2px; text-transform: lowercase;
}
.badge.portable { color: var(--green); border-color: color-mix(in srgb, var(--green) 45%, transparent); background: color-mix(in srgb, var(--green) 10%, transparent); }
.badge.adaptable { color: var(--accent-text); border-color: color-mix(in srgb, var(--accent) 45%, transparent); background: var(--accent-soft); }
.badge.platform-specific { color: var(--text-secondary); }
.badge.type { color: var(--blue); border-color: color-mix(in srgb, var(--blue) 40%, transparent); background: color-mix(in srgb, var(--blue) 10%, transparent); }
.badge.private { color: var(--red); border-color: color-mix(in srgb, var(--red) 45%, transparent); background: color-mix(in srgb, var(--red) 10%, transparent); }

/* Filter bar */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 22px; align-items: center; }
.filters .label { color: var(--text-tertiary); font-size: 12px; margin-right: 4px; text-transform: uppercase; letter-spacing: 1px; }
.chip {
  cursor: pointer; font-size: 13px; padding: 6px 13px; border-radius: 999px;
  border: 1px solid var(--border-strong); background: transparent; color: var(--text-secondary); font-family: var(--font);
}
.chip:hover { color: var(--text); border-color: var(--text-secondary); }
.chip.active { background: var(--accent); color: #062722; border-color: var(--accent); font-weight: 500; }

/* Detail page */
.detail-head { padding: 48px 0 24px; border-bottom: 1px solid var(--border); }
.detail-head h1 { font-size: 34px; margin: 10px 0 8px; font-weight: 600; }
.meta-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.content { padding-block: 32px; }
.content p { color: var(--text); opacity: .9; }
.content ul, .content ol { color: var(--text); opacity: .9; }
.content h2 { font-size: 22px; margin-top: 34px; }
.content code { font-family: var(--mono); font-size: 13px; background: var(--code-inline-bg); padding: 2px 6px; border-radius: 4px; color: var(--code-inline); }
.content pre {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 16px; overflow-x: auto; line-height: 1.5;
}
.content pre code { background: none; padding: 0; color: var(--code-text); }
.content blockquote { border-left: 3px solid var(--accent); margin: 16px 0; padding: 2px 16px; color: var(--text-secondary); }
table { border-collapse: collapse; width: 100%; margin: 16px 0; font-size: 14px; }
th, td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; }
th { background: var(--surface-2); }

/* Adaptation prompt block */
.adapt {
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); border-radius: var(--radius);
  padding: 20px; margin: 24px 0;
}
.adapt h3 { margin: 0 0 6px; color: var(--accent-text); }
.adapt .hint { color: var(--text-secondary); font-size: 13px; margin-bottom: 12px; }
.adapt pre { background: var(--code-bg); color: var(--code-text); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px; max-height: 360px; overflow: auto; }
.btn {
  cursor: pointer; font-family: var(--font); font-weight: 500; font-size: 13px;
  background: var(--accent); color: #062722; border: none; border-radius: var(--radius-sm);
  padding: 9px 16px; transition: background .15s;
}
.btn:hover { background: var(--accent-strong); }
.btn.copied { background: var(--green); color: #10220a; }
.btn.ghost { background: transparent; border: 1px solid var(--border-strong); color: var(--text-secondary); }
.btn.ghost:hover { background: var(--surface-2); color: var(--text); border-color: var(--accent-text); }
.btn.ghost.copied { background: var(--green); color: #10220a; border-color: var(--green); }
.md-copy { display: flex; justify-content: flex-end; margin: 0 0 18px; }

/* Footer */
footer { border-top: 1px solid var(--border); padding: 32px 0; color: var(--text-tertiary); font-size: 13px; }

/* ---- Home: hero grid + terminal mock ---- */
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 44px; align-items: center; }
.terminal {
  background: #0d0d0d; border: 1px solid var(--border-strong); border-radius: var(--radius);
  overflow: hidden; box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}
.t-bar { display: flex; align-items: center; gap: 6px; padding: 10px 14px; background: #1b1b1b; border-bottom: 1px solid #2a2a2a; }
.t-dot { width: 11px; height: 11px; border-radius: 50%; background: #3a3a3a; }
.t-dot.r { background: #e0604f; } .t-dot.y { background: #e6b14c; } .t-dot.g { background: #69c46d; }
.t-title { margin-left: 8px; color: rgba(255, 255, 255, 0.45); font-size: 12px; font-family: var(--mono); }
.t-body { margin: 0; padding: 16px 18px; font-family: var(--mono); font-size: 12.5px; line-height: 1.8; color: #e6e6e6; white-space: pre-wrap; }
.t-body .t-prompt { color: #69c46d; }
.t-body .t-cmd { color: #ffffff; font-weight: 600; }
.t-body .t-dim { color: rgba(255, 255, 255, 0.5); }
.t-body .t-ok { color: var(--green); }
.t-body .t-accent { color: var(--accent); }

/* Animated session (driven by assets/terminal.js). Lines are hidden only when JS is on
   (`data-js` on <html>), so a no-JS visitor sees the finished session. The invisible .t-ghost
   carries each command's full text so the terminal never reflows while "typing". */
.t-line { display: block; min-height: 1.8em; }
.t-cmd-wrap { display: inline-block; position: relative; vertical-align: top; }
.t-ghost { visibility: hidden; }
.t-typed { position: absolute; left: 0; top: 0; white-space: pre-wrap; }
[data-js] .t-ghost { visibility: hidden; }
[data-js] .t-body .t-line { visibility: hidden; }
[data-js] .t-body .t-line.shown { visibility: visible; }
.t-typed.typing::after {
  content: ''; display: inline-block; width: 7px; height: 13px; background: var(--accent);
  margin-left: 2px; vertical-align: -2px; animation: t-blink 1s steps(1) infinite;
}
@keyframes t-blink { 50% { opacity: 0; } }
.t-replay {
  margin-left: auto; cursor: pointer; display: none; align-items: center; gap: 4px;
  background: transparent; border: 1px solid #3a3a3a; color: rgba(255, 255, 255, 0.55);
  border-radius: 6px; font-size: 11px; padding: 3px 9px; font-family: var(--mono); line-height: 1.4;
}
.t-replay:hover { color: #fff; border-color: var(--accent); }
[data-js] .t-replay { display: inline-flex; }

/* Collapsed sections on skill pages (native <details>) */
details.fold { border: 1px solid var(--border); border-radius: var(--radius); margin: 18px 0; background: var(--surface); }
details.fold > summary {
  cursor: pointer; padding: 15px 18px; font-weight: 600; font-size: 15px; color: var(--text);
  list-style: none; display: flex; align-items: baseline; gap: 10px;
}
details.fold > summary::-webkit-details-marker { display: none; }
details.fold > summary::before { content: '\25B8'; color: var(--accent-text); transition: transform .15s; flex: 0 0 auto; }
details.fold[open] > summary::before { transform: rotate(90deg); }
details.fold > summary:hover { color: var(--accent-text); }
details.fold > summary .fold-sub { font-weight: 400; font-size: 13px; color: var(--text-secondary); }
details.fold > .fold-body { padding: 4px 20px 20px; border-top: 1px solid var(--border); }
details.fold > .fold-body > .hint { color: var(--text-secondary); font-size: 13px; margin: 14px 0 6px; }

/* Numbered step cards */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.step { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.step .n {
  display: inline-flex; width: 26px; height: 26px; align-items: center; justify-content: center;
  border-radius: 50%; background: var(--accent); color: #062722; font-weight: 600; font-size: 13px; margin-bottom: 10px;
}
.step h3 { margin: 0 0 8px; font-size: 16px; }
.step p { margin: 0 0 10px; color: var(--text-secondary); font-size: 14px; }
.step pre {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 12px 14px; margin: 0 0 10px; overflow-x: auto; font-family: var(--mono); font-size: 12.5px;
  line-height: 1.6; color: var(--code-text);
}

/* Workflow pipeline (the daily loop) */
.flow { display: flex; flex-wrap: wrap; gap: 10px; align-items: stretch; margin: 22px 0 8px; }
.flow-node {
  flex: 1 1 175px; min-width: 175px; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px 16px; display: block;
  transition: border-color .15s, transform .15s, background .15s;
}
a.flow-node:hover { border-color: var(--accent); transform: translateY(-2px); background: var(--surface-2); text-decoration: none; }
.flow-node h3 { margin: 0 0 6px; font-size: 14px; }
.flow-node h3 code { font-family: var(--mono); font-size: 13px; color: var(--accent-text); background: none; padding: 0; }
.flow-node p { margin: 0; color: var(--text-secondary); font-size: 13px; line-height: 1.5; }
.flow-arrow { align-self: center; color: var(--text-tertiary); font-size: 18px; flex: 0 0 auto; }

/* Callout (info box) */
.callout {
  background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  border-radius: var(--radius); padding: 16px 20px; font-size: 14.5px;
}
.callout p { margin: 0; color: var(--text); }

/* "You type" mono line (cards, usage blocks) */
.you-type {
  display: block; font-family: var(--mono); font-size: 12.5px; color: var(--code-inline);
  background: var(--code-inline-bg); padding: 7px 11px; border-radius: var(--radius-sm);
  margin-top: 10px; overflow-x: auto; white-space: nowrap;
}

/* "How to use it" block on detail pages */
.usage {
  background: var(--surface); border: 1px solid var(--border); border-left: 3px solid var(--accent);
  border-radius: var(--radius); padding: 18px 20px; margin: 24px 0;
}
.usage h3 { margin: 0 0 8px; color: var(--accent-text); }
.usage h2 { margin: 0 0 8px; color: var(--accent-text); font-size: 18px; font-weight: 600; }
.usage p { margin: 0 0 10px; font-size: 14px; }
.usage .hint { color: var(--text-secondary); font-size: 13px; margin: 12px 0 0; }

/* Portability legend */
.legend { display: flex; flex-wrap: wrap; gap: 10px 26px; margin: 16px 0 6px; font-size: 13.5px; color: var(--text-secondary); }
.legend > div { display: flex; gap: 9px; align-items: baseline; }

/* ---- Home: "Why skills" section + repetition-collapse signature ---- */
.why-skills { border-top: 1px solid var(--border); }
.why-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: start; margin-top: 6px; }
.why-points { list-style: none; padding: 0; margin: 4px 0 0; display: grid; gap: 16px; }
.why-points li { position: relative; padding-left: 26px; color: var(--text-secondary); font-size: 14.5px; line-height: 1.55; }
.why-points li::before { content: '\2192'; position: absolute; left: 0; top: 0; color: var(--accent-text); font-weight: 700; }
.why-points strong { color: var(--text); font-weight: 600; }

/* Signature: a runner dot "performs" the manual ritual top-to-bottom, then the one command
   that replaces all of it glows once. Only these two things move; the text is always readable,
   so no-JS and reduced-motion visitors lose nothing (global reduced-motion rule freezes both). */
.repeat-demo { margin: 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 20px 18px; font-family: var(--mono); overflow: hidden; }
.repeat-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.repeat-head .lbl { font-size: 11px; letter-spacing: 1.3px; text-transform: uppercase; color: var(--text-tertiary); }
.repeat-head .issue { font-size: 11.5px; color: var(--accent-text); border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent); background: var(--accent-soft); padding: 2px 9px; border-radius: 999px; }
.repeat-steps { list-style: none; margin: 0; padding: 2px 0 2px 20px; position: relative; }
.repeat-steps::before { content: ''; position: absolute; left: 4px; top: 8px; bottom: 8px; width: 2px; background: var(--border-strong); border-radius: 2px; }
.repeat-steps::after { content: ''; position: absolute; left: 0; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft), 0 0 12px var(--accent); animation: runner 8s ease-in-out infinite; }
@keyframes runner { 0% { top: 2px; opacity: 0; } 7% { opacity: 1; } 52% { top: calc(100% - 12px); opacity: 1; } 64%, 100% { top: calc(100% - 12px); opacity: 0; } }
.repeat-step { font-size: 12.7px; color: var(--text-secondary); line-height: 1.5; padding: 4px 0; }
.repeat-step .si { color: var(--text-tertiary); margin-right: 8px; }
.repeat-arrow { color: var(--text-tertiary); font-size: 11.5px; letter-spacing: .2px; margin: 12px 0 11px; display: flex; align-items: center; gap: 10px; }
.repeat-arrow::before, .repeat-arrow::after { content: ''; height: 1px; background: var(--border); flex: 1; }
.repeat-cmd { background: var(--code-bg); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 12px 14px; font-size: 12.7px; color: var(--code-text); animation: cmdpulse 8s ease-in-out infinite; }
.repeat-cmd .p { color: var(--text-tertiary); }
.repeat-cmd .c { color: #fff; font-weight: 600; }
.repeat-cmd .ok { display: block; margin-top: 7px; color: var(--accent-text); }
@keyframes cmdpulse { 0%, 54% { box-shadow: none; border-color: var(--border); } 62% { box-shadow: 0 0 0 1px var(--accent), 0 0 22px color-mix(in srgb, var(--accent) 50%, transparent); border-color: var(--accent); } 78%, 100% { box-shadow: none; border-color: var(--border); } }

/* Personal note — a deliberate first-person voice shift, set off from the product copy */
.author-note { margin: 32px 0 0; max-width: 840px; border: 1px solid var(--border); border-left: 3px solid var(--accent); border-radius: var(--radius); background: var(--surface); padding: 20px 24px; }
.author-note p { margin: 0 0 11px; color: var(--text); font-size: 15px; line-height: 1.65; }
.author-note p:last-of-type { margin-bottom: 0; }
.author-note .cmd { font-family: var(--mono); font-size: 13px; color: var(--accent-text); background: var(--code-inline-bg); padding: 1px 6px; border-radius: 4px; }
.author-note footer { margin-top: 13px; color: var(--text-tertiary); font-size: 13px; font-style: normal; }
@media (max-width: 760px) { .why-grid { grid-template-columns: 1fr; gap: 22px; } }

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 640px) {
  .hero h1 { font-size: 32px; }
  .nav-inner { gap: 16px; overflow-x: auto; }
  .flow { flex-direction: column; }
  .flow-arrow { transform: rotate(90deg); align-self: flex-start; margin-left: 24px; }
}

/* Responsive table wrapper + catalog empty state (S4/S5) */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 16px 0; }
.table-wrap > table { margin: 0; }
.empty { color: var(--text-secondary); padding: 24px 0; }

/* Respect reduced-motion (O3) */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}

/* Larger touch targets on coarse pointers (S5) */
@media (max-width: 640px) and (pointer: coarse) {
  .theme-toggle { width: 40px; height: 40px; }
  .chip, .demo-replay, .demo-step { padding: 9px 15px; }
}