/* ==========================================================================
   Josh Grace — Portfolio
   Industrial / motorsport design system. Zero external requests (privacy + CSP).
   ========================================================================== */

:root {
  --graphite: #131519;
  --graphite-2: #171a20;
  --panel: #1c2027;
  --panel-2: #21262e;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);
  --ink: #eef0f4;
  --muted: #aab0bb;
  --steel: #7d848f;
  --accent: #e63419;      /* motorsport red */
  --accent-soft: rgba(230, 52, 25, 0.14);
  --blueprint: #4c8dff;   /* technical diagram accent */
  --ok: #37b26b;

  --maxw: 1160px;
  --radius: 4px;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-display: "Arial Narrow", "Roboto Condensed", var(--font-body);
  --font-mono: ui-monospace, "Cascadia Code", "SFMono-Regular", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--graphite);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  /* subtle CAD/blueprint grid */
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 44px 44px;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }

/* ---------- layout ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 84px 0; border-top: 1px solid var(--line); }
.section--tight { padding: 56px 0; }
.section-head { margin-bottom: 40px; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 14px;
  display: flex; align-items: center; gap: 12px;
}
.eyebrow::before {
  content: ""; width: 26px; height: 2px; background: var(--accent); display: inline-block;
}

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 800; line-height: 1.04; letter-spacing: -0.01em; margin: 0 0 0.4em; }
h1 { font-size: clamp(2.6rem, 6vw, 4.6rem); text-transform: uppercase; letter-spacing: 0.005em; }
h2 { font-size: clamp(1.9rem, 4vw, 2.9rem); text-transform: uppercase; }
h3 { font-size: 1.35rem; letter-spacing: 0; }
p { margin: 0 0 1.1em; color: var(--muted); }
.lead { font-size: 1.2rem; color: var(--ink); max-width: 60ch; }
strong { color: var(--ink); font-weight: 600; }

/* ---------- header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(19, 21, 25, 0.82);
  backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand { display: flex; align-items: center; gap: 12px; font-family: var(--font-display); font-weight: 800; text-transform: uppercase; letter-spacing: 0.06em; font-size: 1.15rem; }
.brand .mark {
  width: 30px; height: 30px; border: 2px solid var(--accent); border-radius: 3px;
  display: grid; place-items: center; font-family: var(--font-mono); font-size: 13px; font-weight: 700; color: var(--accent);
  position: relative;
}
.brand .mark::after { content: ""; position: absolute; inset: 4px; border: 1px solid var(--line-strong); }
.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted); padding: 8px 12px; border-radius: 3px; transition: color 0.15s, background 0.15s;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); background: rgba(255,255,255,0.05); }
.nav-links a[aria-current="page"] { color: var(--accent); }
.nav-cta {
  border: 1px solid var(--accent) !important; color: var(--ink) !important;
}
.nav-cta:hover { background: var(--accent) !important; }

.nav-toggle { display: none; background: none; border: 1px solid var(--line-strong); color: var(--ink); width: 42px; height: 38px; border-radius: 3px; cursor: pointer; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; display: block; width: 18px; height: 2px; background: currentColor; margin: 0 auto; position: relative;
}
.nav-toggle span::before { position: absolute; top: -6px; } .nav-toggle span::after { position: absolute; top: 6px; }

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: 66px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0;
    background: var(--graphite-2); border-bottom: 1px solid var(--line); padding: 8px 16px 16px; display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 8px; border-bottom: 1px solid var(--line); }
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px; font-family: var(--font-mono);
  font-size: 13px; letter-spacing: 0.06em; text-transform: uppercase; font-weight: 600;
  padding: 13px 22px; border-radius: 3px; border: 1px solid var(--line-strong); color: var(--ink);
  background: transparent; cursor: pointer; transition: background 0.15s, border-color 0.15s, transform 0.1s;
}
.btn:hover { border-color: var(--accent); background: var(--accent-soft); }
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--accent); border-color: var(--accent); }
.btn--primary:hover { background: #ff3f22; border-color: #ff3f22; }
.btn .arw { transition: transform 0.15s; }
.btn:hover .arw { transform: translateX(3px); }

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); }
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(60% 80% at 80% -10%, rgba(230,52,25,0.14), transparent 60%),
    radial-gradient(50% 60% at 10% 110%, rgba(76,141,255,0.08), transparent 60%);
  pointer-events: none;
}
.hero-inner { position: relative; padding: 96px 0 88px; }
.hero .tag { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--steel); margin-bottom: 22px; }
.hero h1 { max-width: 16ch; margin-bottom: 26px; }
.hero h1 .accent { color: var(--accent); }
.hero-sub { font-size: 1.22rem; color: var(--ink); max-width: 62ch; margin-bottom: 14px; }
.hero-sub2 { color: var(--muted); max-width: 60ch; margin-bottom: 34px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-rule { margin-top: 46px; display: flex; gap: 28px; flex-wrap: wrap; font-family: var(--font-mono); font-size: 12px; color: var(--steel); text-transform: uppercase; letter-spacing: 0.1em; }
.hero-rule span::before { content: "▸ "; color: var(--accent); }

/* ---------- metrics ---------- */
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.metric { background: var(--graphite-2); padding: 30px 26px; }
.metric .n { font-family: var(--font-display); font-weight: 800; font-size: 2.7rem; line-height: 1; color: var(--ink); }
.metric .n .u { color: var(--accent); }
.metric .l { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-top: 10px; }
@media (max-width: 780px) { .metrics { grid-template-columns: repeat(2, 1fr); } }

/* ---------- cards / grid ---------- */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px) { .grid-3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; transition: border-color 0.15s, transform 0.15s, background 0.15s;
  position: relative;
}
.card:hover { border-color: var(--line-strong); transform: translateY(-2px); }
.card h3 { margin-bottom: 8px; }
.card .kicker { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 14px; }
.card p { font-size: 0.98rem; margin-bottom: 0; }
.card-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 18px; font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink); }
.card-link .arw { transition: transform 0.15s; }
.card:hover .card-link .arw { transform: translateX(3px); }
.card-link.muted { color: var(--steel); }

/* project cards with corner index */
.card .idx { position: absolute; top: 18px; right: 20px; font-family: var(--font-mono); font-size: 11px; color: var(--steel); }
.status { display: inline-block; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase; padding: 3px 9px; border-radius: 999px; border: 1px solid var(--line-strong); color: var(--muted); }
.status--live { color: var(--ok); border-color: rgba(55,178,107,0.4); }
.status--rnd { color: var(--blueprint); border-color: rgba(76,141,255,0.4); }
.status--dev { color: var(--steel); }

/* ---------- tag chips ---------- */
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.tag-chip { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em; color: var(--muted); background: var(--panel-2); border: 1px solid var(--line); padding: 4px 10px; border-radius: 3px; }

/* ---------- timeline ---------- */
.timeline { position: relative; margin-left: 8px; }
.tl-item { position: relative; padding: 0 0 40px 34px; border-left: 1px solid var(--line-strong); }
.tl-item:last-child { border-left-color: transparent; padding-bottom: 0; }
.tl-item::before { content: ""; position: absolute; left: -6px; top: 4px; width: 11px; height: 11px; background: var(--graphite); border: 2px solid var(--accent); border-radius: 50%; }
.tl-when { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); }
.tl-item h3 { margin: 6px 0 2px; }
.tl-org { font-family: var(--font-mono); font-size: 13px; color: var(--steel); margin-bottom: 12px; }
.tl-item ul { margin: 12px 0 0; padding-left: 18px; color: var(--muted); }
.tl-item li { margin-bottom: 5px; }

/* ---------- capability groups ---------- */
.cap-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
@media (max-width: 760px) { .cap-grid { grid-template-columns: 1fr; } }
.cap { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.cap h3 { display: flex; align-items: center; gap: 10px; }
.cap h3 .dot { width: 8px; height: 8px; background: var(--accent); border-radius: 2px; }
.cap ul { list-style: none; margin: 14px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.cap li { font-family: var(--font-mono); font-size: 12px; color: var(--muted); background: var(--panel-2); border: 1px solid var(--line); padding: 5px 11px; border-radius: 3px; }
.cap .evidence { margin-top: 16px; font-size: 0.9rem; }
.cap .evidence a { color: var(--blueprint); border-bottom: 1px solid rgba(76,141,255,0.35); }

/* ---------- prose (about, case studies) ---------- */
.prose { max-width: 68ch; }
.prose p { color: var(--muted); }
.prose h2 { margin-top: 1.6em; }
.prose ul { color: var(--muted); padding-left: 20px; }
.prose li { margin-bottom: 6px; }

/* two-column split */
.split { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 48px; align-items: start; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; gap: 32px; } }

.panel {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px;
}
.panel h4 { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); font-weight: 700; margin-bottom: 16px; }
.spec-list { list-style: none; margin: 0; padding: 0; }
.spec-list li { display: flex; justify-content: space-between; gap: 16px; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 0.95rem; }
.spec-list li:last-child { border-bottom: none; }
.spec-list .k { color: var(--steel); font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
.spec-list .v { color: var(--ink); text-align: right; }

/* ---------- filter bar ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.filter-btn {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--muted); background: transparent; border: 1px solid var(--line-strong); padding: 8px 15px; border-radius: 3px; cursor: pointer;
  transition: all 0.15s;
}
.filter-btn:hover { color: var(--ink); border-color: var(--muted); }
.filter-btn[aria-pressed="true"] { color: var(--graphite); background: var(--accent); border-color: var(--accent); font-weight: 700; }

/* ---------- callout / note ---------- */
.note {
  background: var(--accent-soft); border: 1px solid rgba(230,52,25,0.3); border-left: 3px solid var(--accent);
  border-radius: 3px; padding: 16px 20px; font-size: 0.95rem; color: var(--ink); margin: 24px 0;
}
.note--blueprint { background: rgba(76,141,255,0.1); border-color: rgba(76,141,255,0.3); border-left-color: var(--blueprint); }

/* ---------- forms ---------- */
.form-grid { display: grid; gap: 18px; }
.form-row { display: grid; gap: 18px; grid-template-columns: 1fr 1fr; }
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }
label { display: block; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }
input, select, textarea {
  width: 100%; background: var(--graphite-2); border: 1px solid var(--line-strong); border-radius: 3px;
  color: var(--ink); font-family: var(--font-body); font-size: 16px; padding: 12px 14px;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
textarea { resize: vertical; min-height: 140px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-status { font-family: var(--font-mono); font-size: 13px; margin-top: 6px; min-height: 20px; }
.form-status.ok { color: var(--ok); } .form-status.err { color: var(--accent); }

/* ---------- resume ---------- */
.resume { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 40px; }
.resume h2 { font-size: 1.5rem; border-bottom: 1px solid var(--line-strong); padding-bottom: 8px; margin-top: 34px; }
.resume h2:first-child { margin-top: 0; }
.resume .r-entry { margin-bottom: 22px; }
.resume .r-head { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; align-items: baseline; }
.resume .r-title { font-weight: 700; color: var(--ink); }
.resume .r-when { font-family: var(--font-mono); font-size: 12px; color: var(--accent); }
.resume .r-org { color: var(--steel); font-style: italic; font-size: 0.95rem; margin-bottom: 6px; }
.resume ul { color: var(--muted); padding-left: 18px; margin: 8px 0 0; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); background: var(--graphite-2); padding: 56px 0 40px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr; gap: 28px; } }
.footer-grid h5 { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--steel); margin: 0 0 16px; }
.footer-grid a { color: var(--muted); display: block; padding: 5px 0; font-size: 0.95rem; }
.footer-grid a:hover { color: var(--ink); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--line); font-family: var(--font-mono); font-size: 12px; color: var(--steel); }

/* ---------- misc ---------- */
.centered { text-align: center; }
.section-cta { text-align: center; padding: 84px 0; }
.section-cta h2 { max-width: 20ch; margin: 0 auto 20px; }
.section-cta p { max-width: 58ch; margin: 0 auto 30px; }
.section-cta .hero-cta { justify-content: center; }
.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 16px; top: 10px; z-index: 100; background: var(--accent); color: #fff; padding: 8px 14px; border-radius: 3px; }
.divider-num { font-family: var(--font-mono); font-size: 12px; color: var(--steel); letter-spacing: 0.1em; }

/* fade-in on scroll */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

/* print (resume) */
@media print {
  .site-header, .site-footer, .nav-toggle, .btn { display: none !important; }
  body { background: #fff; color: #000; font-size: 12px; }
  .resume { border: none; padding: 0; background: #fff; color: #000; }
  .resume .r-when, .tl-when { color: #000; }
  a { color: #000; }
}