/* Everything is self-hosted (fonts included) so the CSP stays at 'self' only. */

@font-face { font-family: "Plex Sans"; src: url("fonts/ibm-plex-sans-latin-400-normal.77bc02670657.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Plex Sans"; src: url("fonts/ibm-plex-sans-latin-600-normal.196e3cbc5fee.woff2") format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: "Plex Sans"; src: url("fonts/ibm-plex-sans-latin-700-normal.c277d7b83f8a.woff2") format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: "Plex Mono"; src: url("fonts/ibm-plex-mono-latin-400-normal.79936b18df9f.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Plex Mono"; src: url("fonts/ibm-plex-mono-latin-500-normal.b1c8a895f5fd.woff2") format("woff2"); font-weight: 500; font-display: swap; }

:root {
  --font: "Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --mono: "Plex Mono", ui-monospace, "Cascadia Code", Menlo, Consolas, monospace;

  /* One dark palette for the whole site (matches the hero). */
  --ink: #0b1422;
  --ink-2: #111d30;
  --ink-line: #22324a;
  --ink-text: #e9eff6;
  --ink-muted: #9db0c6;
  --ink-accent: #3fd3bf;

  --bg: var(--ink);
  --bg-alt: #0e1929;
  --surface: #111d30;
  --text: #e6edf5;
  --muted: #9db0c6;
  --border: #22324a;
  --accent: #3fd3bf;
  --accent-soft: #12302d;
  --accent-ink: #9be8dc;
  --ok: #4cc27a;
  --err: #ff8a80;
  --grid: rgba(34, 50, 74, .35);  /* faint page grid; the hero uses a stronger one */

  --radius: 12px;
  --shadow: 0 1px 2px rgba(0, 0, 0, .35), 0 12px 32px -16px rgba(0, 0, 0, .7);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background:
    linear-gradient(var(--grid) 1px, transparent 1px) 0 0 / 48px 48px,
    linear-gradient(90deg, var(--grid) 1px, transparent 1px) 0 0 / 48px 48px,
    var(--bg);
  color: var(--text);
  font: 17px/1.65 var(--font);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
code, .mono { font-family: var(--mono); }
h1, h2, h3, h4 { letter-spacing: -0.015em; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 32px; } }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 10; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 5;
  background: color-mix(in srgb, var(--ink) 92%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--ink-line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink-text); text-decoration: none; font-weight: 600; white-space: nowrap; }
.brand-mark {
  display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 8px;
  font: 500 13px/1 var(--mono); color: var(--ink); background: var(--ink-accent);
}
.site-header nav { display: flex; align-items: center; gap: 22px; }
.site-header nav a { color: var(--ink-muted); text-decoration: none; font-size: 15px; }
.site-header nav a:hover { color: var(--ink-text); }
.site-header nav .nav-cta { color: var(--ink-text); border: 1px solid var(--ink-line); border-radius: 8px; padding: 6px 12px; }
.site-header nav .nav-cta:hover { border-color: var(--ink-accent); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  color: var(--ink-text);
  /* Transparent base: the page's faint grid continues underneath. */
  background: radial-gradient(1200px 500px at 85% -10%, rgba(63, 211, 191, .14), transparent 60%);
  padding: 88px 0 72px;
}
.hero::before { /* stronger grid that fades into the page grid, no seam */
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(var(--ink-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--ink-line) 1px, transparent 1px);
  background-size: 48px 48px;
  /* The hero starts below the 65px header; shift so its lines sit on the page grid. */
  background-position: 0 -17px;
  opacity: .55;
  -webkit-mask-image: linear-gradient(#000 40%, transparent 95%);
  mask-image: linear-gradient(#000 40%, transparent 95%);
}
.hero .wrap { position: relative; z-index: 1; }

.pill {
  display: inline-flex; align-items: center; gap: 10px; margin: 0 0 22px;
  font: 500 13px/1.4 var(--mono); color: var(--ink-text);
  background: var(--ink-2); border: 1px solid var(--ink-line); border-radius: 999px; padding: 6px 14px;
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: #34d399; box-shadow: 0 0 0 4px rgba(52, 211, 153, .18); flex: none; }

.hero h1 { font-size: clamp(2.6rem, 6.5vw, 4.6rem); line-height: 1.02; margin: 0 0 14px; letter-spacing: -0.035em; font-weight: 700; }
.headline {
  margin: 0 0 26px; color: var(--ink-accent);
  font: 500 clamp(0.85rem, 1.6vw, 1rem)/1.5 var(--mono); letter-spacing: .04em; text-transform: uppercase;
}
.bio { max-width: 64ch; color: var(--ink-muted); font-size: 1.1rem; }
.bio p { margin: 0 0 1em; }

.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; margin-top: 30px; }
.text-link { color: var(--ink-text); font-weight: 600; }
.loc { color: var(--ink-muted); font-size: 15px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font: 600 15px/1 var(--font); text-decoration: none; cursor: pointer;
  border-radius: 10px; padding: 13px 20px; border: 1px solid transparent;
  transition: transform .12s ease, background-color .12s ease, border-color .12s ease;
}
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn-primary { background: var(--ink-accent); color: var(--ink); }
.btn-primary:hover { background: #63e0cf; }
.btn-ghost { color: var(--ink-text); border-color: var(--ink-line); }
.btn-ghost:hover { border-color: var(--ink-accent); }
@media (prefers-reduced-motion: reduce) { .btn { transition: none; } .btn:hover { transform: none; } }

/* Monogram badge (decorative, stands in for a photo) */
.hero-grid { display: grid; gap: 40px; align-items: center; }
@media (min-width: 960px) { .hero-grid { grid-template-columns: minmax(0, 1fr) 300px; gap: 64px; } }
.hero-art { display: none; }
@media (min-width: 960px) { .hero-art { display: block; } }
.avatar { display: block; width: 100%; height: auto; overflow: visible; }
.av-ring { fill: none; stroke: var(--ink-line); stroke-width: 1.5; stroke-dasharray: 3 7; }
.av-links line { stroke: var(--ink-line); stroke-width: 1.5; }
.av-nodes circle { fill: var(--ink); stroke: var(--ink-accent); stroke-width: 2; }
.av-stop-top { stop-color: #16324a; }
.av-stop-bottom { stop-color: #0d1b2c; }
.av-shield { stroke: var(--ink-accent); stroke-width: 2.5; stroke-linejoin: round; }
.av-shield-inner { fill: none; stroke: rgba(63, 211, 191, .28); stroke-width: 1.2; stroke-linejoin: round; }
.av-initials { font: 500 64px var(--mono); fill: var(--ink-text); letter-spacing: 2px; }

/* Headline numbers: value shown first, label read first by screen readers (dt before dd). */
.stats {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px;
  margin: 56px 0 0; background: var(--ink-line); border: 1px solid var(--ink-line); border-radius: var(--radius); overflow: hidden;
}
.stat { display: flex; flex-direction: column-reverse; justify-content: flex-end; background: var(--ink-2); padding: 20px 22px; }
.stat dd { margin: 0; font: 500 clamp(1.8rem, 3.6vw, 2.5rem)/1.05 var(--mono); color: var(--ink-text); letter-spacing: -0.03em; }
.stat dt { margin-top: 8px; font-size: 14px; color: var(--ink-muted); line-height: 1.4; }
@media (max-width: 760px) { .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* ---------- Sections ---------- */
.section { padding: 96px 0; }
.section.alt { background: var(--bg-alt); border-block: 1px solid var(--border); }
.eyebrow { margin: 0 0 10px; font: 500 13px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }
.section h2 { font-size: clamp(1.8rem, 3.6vw, 2.5rem); line-height: 1.1; margin: 0 0 12px; }
.section-lede { color: var(--muted); max-width: 62ch; margin: 0 0 40px; }
.sub { margin: 56px 0 18px; font-size: 1.15rem; }

/* ---------- Case studies ---------- */
.cases { display: grid; gap: 24px; }
.case {
  display: grid; gap: 28px; align-items: center;
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
  padding: 28px; box-shadow: var(--shadow);
}
@media (min-width: 960px) {
  .case { grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); padding: 36px; gap: 40px; }
  .case:nth-child(even) .case-figure { order: -1; }
}
.case-num { margin: 0 0 8px; font: 500 12.5px/1.4 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.case h3 { font-size: clamp(1.25rem, 2.2vw, 1.5rem); line-height: 1.25; margin: 0 0 18px; }
.case-block { margin: 0 0 16px; }
.case-block p { margin: 0; }
.case-label { margin: 0 0 4px !important; font: 500 12px/1.4 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--accent); }
.case-figure {
  margin: 0; padding: 24px; border-radius: 12px; max-width: 460px; justify-self: center; width: 100%;
  background: var(--ink); border: 1px dashed var(--border);
}

/* Diagram (SVG built server-side; see templatetags/diagrams.py) */
.dg { display: block; width: 100%; height: auto; overflow: visible; }
.dg-box { fill: var(--surface); stroke: var(--border); stroke-width: 1.2; }
.dg-check { stroke: var(--accent); stroke-dasharray: 4 3; }
.dg-end { fill: var(--accent-soft); stroke: var(--accent); }
.dg-title { font: 600 15px var(--font); fill: var(--text); }
.dg-sub { font: 400 12.5px var(--mono); fill: var(--muted); }
.dg-step { font: 500 12px var(--mono); fill: var(--accent); }
.dg-line { stroke: var(--muted); stroke-width: 1.4; }
.dg-arrowhead { fill: var(--muted); }
.dg-note { font: 400 12.5px var(--mono); fill: var(--muted); }

/* ---------- Tags ---------- */
.tags { list-style: none; padding: 0; margin: 18px 0 0; display: flex; flex-wrap: wrap; gap: 6px; }
.tags li { background: var(--accent-soft); color: var(--accent-ink); border-radius: 6px; padding: 3px 9px; font: 400 13px/1.5 var(--mono); }
.tags.small li { font-size: 12px; }

/* ---------- Smaller projects / writing ---------- */
.mini-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; display: flex; flex-direction: column; }
.card h4 { margin: 0 0 8px; font-size: 1.05rem; }
.card p { margin: 0 0 8px; }
.card .tags { margin-top: auto; padding-top: 10px; }
.card-links { display: flex; gap: 16px; margin-top: 12px !important; font-weight: 600; }
.note { font: 400 13px var(--mono); color: var(--muted); margin-top: 12px !important; }

/* ---------- About ---------- */
.about-grid { display: grid; gap: 16px 64px; }
@media (min-width: 900px) { .about-grid { grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); } }
.about-body p { margin: 0 0 1em; font-size: 1.1rem; max-width: 64ch; }
.about-body p:last-child { margin-bottom: 0; }

/* ---------- Principles ---------- */
.principles { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); margin-top: 32px; }
.principle { border-top: 2px solid var(--accent); padding-top: 18px; }
.principle-num { margin: 0 0 10px; font: 500 13px var(--mono); color: var(--muted); }
.principle h3 { margin: 0 0 8px; font-size: 1.2rem; }
.principle p { margin: 0; color: var(--muted); }

/* ---------- Skills ---------- */
.skill-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); margin-top: 32px; }
.skill { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.skill h3 { margin: 0; font-size: 1rem; }
.skill .tags { margin-top: 12px; }

.certs { list-style: none; padding: 0; margin: 0; display: grid; gap: 0 32px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); }
.certs li { display: flex; justify-content: space-between; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--border); }
.cert-name { font-weight: 600; font-size: 15px; }
.cert-issuer { font: 400 12.5px/1.8 var(--mono); color: var(--muted); white-space: nowrap; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; gap: 32px; }
@media (min-width: 900px) { .contact-grid { grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 64px; } }
.contact-form {
  display: grid; gap: 16px; background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 28px; box-shadow: var(--shadow);
}
.field label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
.field input, .field textarea, .field select {
  width: 100%; font: inherit; font-size: 16px; color: var(--text);
  background: var(--ink); border: 1px solid var(--border); border-radius: 10px; padding: 11px 13px;
}
.field textarea { resize: vertical; min-height: 140px; }
.field select { appearance: auto; }
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent); }
.field.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.error, .errors { color: var(--err); font-size: 14px; margin: 6px 0 0; }
.contact-form .btn { justify-self: start; border: 0; }

/* ---------- Flash messages ---------- */
.flash-wrap { padding-top: 16px; }
.flash { margin: 0 0 8px; padding: 12px 16px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface); }
.flash-success { border-color: var(--ok); }
.flash-error { border-color: var(--err); }

/* ---------- Article ---------- */
.prose { max-width: 720px; }
.prose h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); line-height: 1.12; margin: 8px 0 16px; }
.prose .lede { font-size: 1.15rem; color: var(--muted); }
.kind { font: 500 12.5px var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 0 0 6px; }

/* ---------- Writing ---------- */
.section-head-row { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 8px 24px; }
.text-cta { font-weight: 600; text-decoration: none; }
.post-grid { display: grid; gap: 16px; margin-top: 28px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); }
.post-list { display: grid; gap: 16px; margin-top: 8px; }
.post-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; display: flex; flex-direction: column; transition: border-color .15s ease;
}
.post-card:hover { border-color: var(--accent); }
.post-card h3 { margin: 0 0 8px; font-size: 1.2rem; line-height: 1.3; }
.post-card h3 a { color: var(--text); text-decoration: none; }
.post-card h3 a:hover { color: var(--accent); }
.post-card p { margin: 0 0 8px; color: var(--muted); }
.post-card .tags { margin-top: auto; padding-top: 8px; }
.post-meta { margin: 0 0 10px !important; font: 400 12.5px/1.5 var(--mono); color: var(--muted); }
.page-head { padding-top: 72px; }
.page-title { font-size: clamp(2rem, 4.5vw, 3rem); line-height: 1.08; margin: 0 0 12px; letter-spacing: -0.03em; }
.muted-block { color: var(--muted); padding: 24px; border: 1px dashed var(--border); border-radius: var(--radius); }
.draft-banner { margin: 0 0 20px; padding: 10px 14px; border-radius: 10px; border: 1px dashed #f5b84b; color: #f5d08a; font: 500 13px var(--mono); }

.page-title .accent { font-style: italic; color: var(--accent); font-weight: 600; }
.eyebrow .dot { display: inline-block; margin-right: 8px; vertical-align: middle; width: 7px; height: 7px; box-shadow: 0 0 0 3px rgba(52, 211, 153, .18); }
.filters { display: inline-flex; flex-wrap: wrap; gap: 4px; margin: 4px 0 24px; padding: 4px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); }
.filters a { padding: 6px 16px; border-radius: 999px; color: var(--muted); text-decoration: none; font-size: 15px; }
.filters a:hover { color: var(--text); }
.filters a.is-active { background: var(--accent); color: var(--ink); font-weight: 600; }
.kind-badge { color: var(--accent); text-transform: uppercase; letter-spacing: .06em; }
.post-card.is-note { border-style: dashed; }
.post-card.is-case { border-left: 3px solid var(--accent); }

.case-more { margin: 18px 0 0 !important; font-weight: 600; }
.case-more a { text-decoration: none; }
.case-more a:hover { text-decoration: underline; }
.muted-mono { font: 400 12.5px var(--mono); color: var(--muted); margin-left: 6px; }
.prose:has(.case-summary) { max-width: 960px; }
.case-summary {
  display: grid; gap: 24px; align-items: center; margin: 28px 0 8px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 24px;
}
.case-summary p { margin: 0 0 12px; }
@media (min-width: 900px) { .case-summary { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px; } }
.disclaimer { margin: 16px 0 0 !important; font: 400 13px/1.6 var(--mono); color: var(--muted); }

/* Post body (sanitized Markdown) */
.post-body { margin-top: 28px; font-size: 1.05rem; }
.post-body h2 { font-size: 1.5rem; margin: 2em 0 .5em; }
.post-body h3 { font-size: 1.2rem; margin: 1.6em 0 .4em; }
.post-body p, .post-body li { max-width: 70ch; }
.post-body ul, .post-body ol { padding-left: 1.3em; }
.post-body li { margin: .3em 0; }
.post-body blockquote { margin: 1.4em 0; padding: 4px 18px; border-left: 3px solid var(--accent); color: var(--muted); }
.post-body code { font-size: .88em; background: var(--surface); border: 1px solid var(--border); border-radius: 5px; padding: 1px 5px; }
.post-body pre { background: #070d16; border: 1px solid var(--border); border-radius: 10px; padding: 16px 18px; overflow-x: auto; line-height: 1.5; }
.post-body pre code { background: none; border: 0; padding: 0; font-size: 14px; }
.post-body table { border-collapse: collapse; width: 100%; margin: 1.4em 0; font-size: .95rem; display: block; overflow-x: auto; }
.post-body th, .post-body td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; }
.post-body th { background: var(--surface); }
.post-body hr { border: 0; border-top: 1px solid var(--border); margin: 2.4em 0; }
.post-end { margin-top: 48px !important; }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: var(--ink-muted); font-size: 14px; border-top: 1px solid var(--ink-line); }
.footer-grid { display: grid; gap: 32px; padding-block: 48px 32px; }
@media (min-width: 760px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr; } }
.footer-about p { margin: 12px 0 0; max-width: 36ch; }
.footer-col { display: flex; flex-direction: column; gap: 8px; }
.footer-col a { color: var(--ink-muted); text-decoration: none; }
.footer-col a:hover { color: var(--ink-text); }
.footer-h { margin: 0 0 4px; font: 500 12px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--ink-text); }
.footer-base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; padding-block: 20px 28px; border-top: 1px solid var(--ink-line); }
.site-footer .footer-base p { margin: 0; }
.site-footer .mono { font-size: 12.5px; }

@media (max-width: 560px) {
  body { font-size: 16px; }
  .hero { padding: 56px 0 48px; }
  .section { padding: 64px 0; }
  .site-header nav { gap: 14px; }
  .site-header nav a:not(.nav-cta) { display: none; }
  .case { padding: 20px; }
  .case-figure { padding: 16px; }
  .contact-form { padding: 20px; }
}