:root {
  --bg: #fbfaf7;
  --fg: #1d1d1b;
  --muted: #66655f;
  --accent: #1f5f4a;
  --line: #e1dfd7;
  --panel: #f1efe8;
  --warn-bg: #fff6dd;
  --warn-line: #e5c766;
  --high: #a32121;
  --med: #8a5a00;
  --low: #3a5a80;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161715;
    --fg: #e8e6df;
    --muted: #9b9a92;
    --accent: #6fcaa6;
    --line: #2d2f2b;
    --panel: #1f211e;
    --warn-bg: #2b2616;
    --warn-line: #6b5a1f;
    --high: #ff8a8a;
    --med: #f0b95a;
    --low: #8db7ea;
  }
}
* { box-sizing: border-box; }
html { font-size: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 1.0625rem/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main, .site-header, .site-footer { max-width: 42rem; margin: 0 auto; padding: 0 1rem; }
main { padding-bottom: 3rem; }
.site-header {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between;
  gap: .5rem 1.5rem; padding-top: 1.5rem; padding-bottom: 1rem;
  border-bottom: 1px solid var(--line); margin-bottom: 2rem;
}
.brand { font-weight: 700; text-decoration: none; color: var(--fg); }
nav a { margin-left: 1.25rem; color: var(--muted); text-decoration: none; }
nav a:hover, nav a:focus-visible { color: var(--accent); text-decoration: underline; }
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.25; }
h1 { font-size: 1.9rem; margin: 0 0 .75rem; }
h2 { font-size: 1.3rem; margin: 2rem 0 .5rem; }
.lead { font-size: 1.15rem; color: var(--muted); margin-top: 0; }
.muted { color: var(--muted); }
.summary { color: var(--muted); font-size: .95rem; }
.post-list { list-style: none; padding: 0; }
.post-list li { margin: 0 0 1rem; }
pre, code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9em; }
code { background: var(--panel); padding: .1em .3em; border-radius: 3px; }
pre { background: var(--panel); padding: 1rem; overflow-x: auto; border-radius: 6px; }
pre code { background: none; padding: 0; }
blockquote { margin: 1rem 0; padding-left: 1rem; border-left: 3px solid var(--line); color: var(--muted); }
img { max-width: 100%; height: auto; }
.ai-note { margin-top: 2.5rem; padding-top: 1rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
.site-footer { border-top: 1px solid var(--line); padding-top: 1rem; padding-bottom: 2rem; color: var(--muted); font-size: .9rem; }
.notice { background: var(--warn-bg); border: 1px solid var(--warn-line); padding: .75rem 1rem; border-radius: 6px; }
label { display: block; font-weight: 600; margin: 1.25rem 0 .35rem; }
textarea {
  width: 100%; padding: .75rem; background: var(--panel); color: var(--fg);
  border: 1px solid var(--line); border-radius: 6px;
  font: .9rem/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.actions { display: flex; gap: .75rem; margin: .75rem 0; }
button {
  font: inherit; padding: .5rem 1.1rem; cursor: pointer; border-radius: 6px;
  border: 1px solid var(--accent); background: var(--accent); color: var(--bg);
}
button.secondary { background: transparent; color: var(--accent); }
button:focus-visible, textarea:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.findings { list-style: none; padding: 0; }
.findings li { padding: .6rem .75rem; margin-bottom: .5rem; background: var(--panel); border-radius: 6px; border-left: 4px solid var(--line); }
.findings li.high { border-left-color: var(--high); }
.findings li.medium { border-left-color: var(--med); }
.findings li.low { border-left-color: var(--low); }
.findings .tag { font-weight: 700; font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; }
.findings .high .tag { color: var(--high); }
.findings .medium .tag { color: var(--med); }
.findings .low .tag { color: var(--low); }
.findings .where { color: var(--muted); font-size: .9rem; }
@media (max-width: 480px) { h1 { font-size: 1.6rem; } nav a { margin: 0 1rem 0 0; } }
.cats { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; margin: 0 0 1.5rem; }

/* ---- AI use card builder ---- */
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
body:has(.builder) main, body:has(.builder) .site-header, body:has(.builder) .site-footer { max-width: 66rem; }
.builder { display: grid; grid-template-columns: minmax(16rem, 21rem) minmax(0, 1fr); gap: 1.5rem; align-items: start; margin-top: 1.5rem; }
.builder .controls h2 { font-size: 1.1rem; margin-top: 0; }
.builder input[type=text], .builder input[type=date], .builder select {
  width: 100%; padding: .45rem .6rem; background: var(--panel); color: var(--fg);
  border: 1px solid var(--line); border-radius: 6px; font: inherit;
}
.builder label { font-weight: 600; margin: .9rem 0 .25rem; }
.builder label.inline { display: block; font-weight: 400; margin: .35rem 0; }
.builder label.inline input { margin-right: .35rem; }
.builder fieldset.opts { border: 1px solid var(--line); border-radius: 6px; margin: 1.1rem 0 0; padding: .4rem .8rem .7rem; }
.builder fieldset.opts legend { font-weight: 700; padding: 0 .3rem; }
.builder .hint { font-weight: 400; color: var(--muted); font-size: .85rem; }
.builder .output .actions { align-items: center; flex-wrap: wrap; margin-top: 0; }

.paper {
  --paper-accent: #1f5f4a;
  background: #fff; color: #1d1d1b; border: 1px solid #d9d7cf; border-radius: 4px;
  padding: 0 0 1.2rem; line-height: 1.5; font-size: .96rem; overflow: hidden;
}
.paper[data-accent="blue"] { --paper-accent: #1b4f8a; }
.paper[data-accent="purple"] { --paper-accent: #5b3a8c; }
.paper[data-accent="charcoal"] { --paper-accent: #333333; }
.paper .paper-head { background: var(--paper-accent); color: #fff; padding: 1.2rem 1.6rem 1.1rem; }
.paper h2.paper-title { margin: 0 0 .35rem; font-size: 1.55rem; color: #fff; }
.paper .paper-intro { margin: 0; color: #f1f1ee; }
.paper > section, .paper > footer { margin-left: 1.6rem; margin-right: 1.6rem; }
.paper h3 { margin: 0 0 .35rem; font-size: 1.02rem; }
.paper .paper-sec { margin-top: 1.2rem; }
.paper .paper-sec h3 { color: var(--paper-accent); }
.paper ul, .paper ol { margin: .3rem 0; padding-left: 1.3rem; }
.paper li { margin: .22rem 0; }

.paper .tier { margin-top: 1rem; padding: .7rem 1rem .8rem; border-left: 8px solid; border-radius: 0 4px 4px 0; }
.paper .tier .tier-note { margin: 0 0 .3rem; font-size: .88rem; }
.paper .tier-green { background: #e9f4e9; border-color: #2e7d32; color: #153d17; }
.paper .tier-green h3 { color: #1b5e20; }
.paper .tier-amber { background: #fdf2dc; border-color: #d98a00; color: #4a3200; }
.paper .tier-amber h3 { color: #8a5600; }
.paper .tier-red { background: #fbe7e5; border-color: #c62828; color: #4d1311; }
.paper .tier-red h3 { color: #a01c1c; }

.paper .cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .6rem; }
.paper .card { border: 1px solid #d9d7cf; border-radius: 4px; padding: .5rem .7rem; }
.paper .card p { margin: .25rem 0 0; font-size: .92rem; color: #3d3d39; }
.paper .paper-box { margin-top: 1.2rem; padding: .7rem 1rem; border: 2px dashed var(--paper-accent); border-radius: 4px; }
.paper .paper-box h3 { color: var(--paper-accent); }
.paper .paper-box p { margin: .25rem 0; }
.paper .paper-foot { margin-top: 1rem; padding-top: .6rem; border-top: 1px solid #d9d7cf; font-size: .85rem; color: #5a5a55; }

@media (max-width: 860px) { .builder { grid-template-columns: 1fr; } }
@media (max-width: 560px) { .paper .cards { grid-template-columns: 1fr; } }

@media print {
  body { background: #fff; }
  .no-print, .site-header, .site-footer, .builder .controls { display: none !important; }
  body:has(.builder) main { max-width: none; padding: 0; margin: 0; }
  .builder { display: block; margin: 0; }
  .paper { border: none; border-radius: 0; font-size: 10pt;
    -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .paper .paper-head, .paper .tier, .paper .paper-box { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .paper .tier, .paper .card, .paper .paper-box, .paper .paper-sec { break-inside: avoid; }
}

/* ---- skills ---- */
.button { display: inline-block; padding: .5rem 1.1rem; border-radius: 6px; background: var(--accent); color: var(--bg); text-decoration: none; font-weight: 600; }
.button:hover, .button:focus-visible { filter: brightness(1.1); }
details.file { border: 1px solid var(--line); border-radius: 6px; margin: .6rem 0; background: var(--panel); }
details.file summary { cursor: pointer; padding: .5rem .8rem; }
details.file pre { margin: 0; border-radius: 0 0 6px 6px; max-height: 32rem; overflow: auto; font-size: .82rem; }

/* ---- videos (click to play) ---- */
figure.video { margin: 1.5rem 0; }
figure.video .video-frame { position: relative; aspect-ratio: 16 / 9; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .6rem;
  background: var(--panel); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
figure.video .video-frame.playing { display: block; border: 0; background: #000; }
figure.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
figure.video .video-play { font-size: 1.1rem; padding: .7rem 1.4rem; }
figure.video figcaption { font-size: .85rem; margin-top: .4rem; }

/* ---- analytics banner ---- */
.analytics-banner { position: fixed; left: 1rem; right: 1rem; bottom: 1rem; max-width: 36rem; margin: 0 auto; z-index: 10;
  display: flex; flex-wrap: wrap; align-items: center; gap: .6rem; padding: .8rem 1rem;
  background: var(--panel); border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 2px 12px rgba(0,0,0,.15); }
.analytics-banner p { margin: 0; flex: 1 1 14rem; font-size: .9rem; }
.analytics-banner button { padding: .4rem 1rem; border-radius: 6px; border: 1px solid var(--accent); background: var(--bg); color: var(--fg); font: inherit; cursor: pointer; }
.analytics-banner button:hover, .analytics-banner button:focus-visible { background: var(--accent); color: var(--bg); }
.link-button { background: none; border: 0; padding: 0; font: inherit; font-size: .85rem; color: var(--muted); text-decoration: underline; cursor: pointer; }

/* ---- post list meta: keep the date and category from splitting across lines ---- */
.post-list .meta { font-size: .9rem; }
.post-list .meta span { white-space: nowrap; }