/* ==========================================================================
   POLECIRCUIT.COM — Design System
   "Circuit Blueprint": timing-tower numerals, telemetry cyan, asphalt dark
   ========================================================================== */

:root {
  --asphalt: #14161a;
  --asphalt-2: #1c1f26;
  --asphalt-3: #23262e;
  --chalk: #f3f2ed;
  --chalk-dim: #cfcfc9;
  --cyan: #3fd4c7;
  --cyan-dim: #2a9c92;
  --amber: #ffb627;
  --muted: #8a8f98;
  --line: #33363e;

  --font-display: 'Barlow Condensed', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  --max-width: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--asphalt);
  color: var(--chalk);
  font-family: var(--font-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--amber); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

img { max-width: 100%; display: block; }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--chalk);
  line-height: 1.05;
  margin: 0 0 0.5em;
}

h1 { font-size: clamp(2.4rem, 5vw, 4.2rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
h3 { font-size: 1.35rem; }

p { color: var(--chalk-dim); margin: 0 0 1.1em; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--amber);
  display: inline-block;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(20, 22, 26, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}
.logo {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--chalk);
  text-transform: uppercase;
  letter-spacing: 0.01em;
  display: flex;
  align-items: baseline;
  gap: 2px;
}
.logo span { color: var(--cyan); }
.logo small {
  font-family: var(--font-mono);
  color: var(--muted);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  margin-left: 8px;
  text-transform: uppercase;
}
.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.nav-links a { color: var(--chalk-dim); }
.nav-links a:hover { color: var(--cyan); }
.nav-toggle { display: none; }

@media (max-width: 760px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--asphalt-2);
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid var(--line);
  }
  .nav-links.open { display: flex; }
  .nav-links a { display: block; padding: 14px 24px; border-top: 1px solid var(--line); }
  .nav-toggle {
    display: block;
    background: none;
    border: 1px solid var(--line);
    color: var(--chalk);
    font-family: var(--font-mono);
    padding: 8px 12px;
    cursor: pointer;
  }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 90px 0 70px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.hero-track {
  position: absolute;
  inset: 0;
  opacity: 0.35;
  pointer-events: none;
}
.hero-content { position: relative; max-width: 720px; }
.hero-content .eyebrow { margin-bottom: 18px; }
.hero-content p.lead {
  font-size: 1.15rem;
  color: var(--chalk-dim);
  max-width: 560px;
}
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.hero-stats .stat .num {
  font-family: var(--font-mono);
  font-size: 2rem;
  color: var(--cyan);
  display: block;
}
.hero-stats .stat .label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border: 1px solid var(--cyan);
  color: var(--cyan);
  background: transparent;
  cursor: pointer;
  margin-top: 26px;
}
.btn:hover { background: var(--cyan); color: var(--asphalt); }
.btn.solid { background: var(--cyan); color: var(--asphalt); }
.btn.solid:hover { background: var(--amber); border-color: var(--amber); color: var(--asphalt); }

/* ---------- Sections ---------- */
section { padding: 70px 0; }
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 40px;
  flex-wrap: wrap;
  gap: 16px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 20px;
}
.section-head .count {
  font-family: var(--font-mono);
  color: var(--muted);
  font-size: 0.82rem;
}

/* ---------- Article Grid / Cards ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 22px;
}
.card {
  background: var(--asphalt-2);
  border: 1px solid var(--line);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.card:hover { border-color: var(--cyan); transform: translateY(-2px); }
.card .tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 12px;
}
.card h3 { margin-bottom: 10px; }
.card h3 a { color: var(--chalk); }
.card h3 a:hover { color: var(--cyan); }
.card p { font-size: 0.94rem; margin-bottom: 14px; flex-grow: 1; }
.card .meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 12px;
  display: flex;
  justify-content: space-between;
}

/* ---------- Category pills ---------- */
.pills {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.pill {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--chalk-dim);
  border: 1px solid var(--line);
  padding: 7px 14px;
}
.pill.active, .pill:hover { color: var(--asphalt); background: var(--cyan); border-color: var(--cyan); }

/* ---------- Article page ---------- */
.article-header {
  padding: 60px 0 40px;
  border-bottom: 1px solid var(--line);
}
.article-header .meta-row {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.article-body {
  max-width: 740px;
  margin: 0 auto;
  padding: 50px 24px;
}
.article-body h2 {
  margin-top: 1.6em;
  font-size: 1.5rem;
  border-left: 3px solid var(--cyan);
  padding-left: 14px;
}
.article-body p { font-size: 1.05rem; color: var(--chalk-dim); }
.article-body ul { color: var(--chalk-dim); padding-left: 20px; }
.article-body li { margin-bottom: 8px; }
.pull-note {
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  background: var(--asphalt-2);
  padding: 18px 22px;
  font-size: 0.94rem;
  color: var(--chalk-dim);
  margin: 30px 0;
}
.pull-note strong { color: var(--amber); font-family: var(--font-mono); text-transform: uppercase; font-size: 0.78rem; letter-spacing: 0.06em; display: block; margin-bottom: 6px; }

.related {
  border-top: 1px solid var(--line);
  padding: 50px 0 70px;
}

/* ---------- Static pages ---------- */
.page-body {
  max-width: 780px;
  margin: 0 auto;
  padding: 60px 24px 90px;
}
.page-body h2 { margin-top: 1.8em; font-size: 1.3rem; }
.page-body p, .page-body li { color: var(--chalk-dim); }
.page-body ul { padding-left: 20px; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 50px 0 30px;
  margin-top: 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-grid h4 {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 16px;
}
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 10px; }
.footer-grid a { color: var(--chalk-dim); font-size: 0.92rem; }
.footer-grid a:hover { color: var(--cyan); }
.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
}
.disclaimer-note {
  font-size: 0.8rem;
  color: var(--muted);
  max-width: 600px;
  line-height: 1.6;
}

@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 18px 0 0;
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--cyan); }