/* ==========================================================================
   Zethesis — custom restyle layered on top of minima
   Palette: cool neutrals + kingfisher teal/blue accent
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --bg: #ffffff;
  --bg-alt: #f4f7f9;
  --text: #1b2733;
  --muted: #5b6b78;
  --border: #e2e8ee;
  --accent: #1c6fb0;
  --accent-dark: #14568a;
  --accent-soft: #e8f1f9;
  --navy: #16385c;
  --gold: #c8962f;
  --gold-dark: #a97d22;
  --gold-soft: #f7edd6;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 42, 60, .04), 0 6px 20px rgba(16, 42, 60, .06);
  --maxw: 1080px;
}

/* ---- Base ---------------------------------------------------------------- */
html { -webkit-text-size-adjust: 100%; }

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.wrapper {
  max-width: var(--maxw);
  padding-left: 24px;
  padding-right: 24px;
}

p { margin-bottom: 1.1em; }

a {
  color: var(--accent);
  text-decoration: none;
  transition: color .15s ease;
}
a:hover { color: var(--accent-dark); text-decoration: underline; }

/* ---- Headings ------------------------------------------------------------ */
h1, h2, h3, h4 {
  color: var(--text);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
}
h1 { font-size: 2.1rem; margin: 0 0 .6em; }
h2 {
  font-size: 1.5rem;
  margin: 2.2em 0 .7em;
  padding-top: .7em;
  border-top: 1px solid var(--border);
}
h3 { font-size: 1.18rem; margin: 1.6em 0 .5em; }
.page-content h2:first-of-type { border-top: 0; padding-top: 0; }

/* ---- Header / nav -------------------------------------------------------- */
.site-header {
  border-top: 3px solid var(--gold);
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  min-height: 64px;
}
.site-title, .site-title:visited {
  color: var(--text) !important;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.site-title:hover { color: var(--accent) !important; text-decoration: none; }
.site-nav .page-link {
  color: var(--muted);
  font-weight: 500;
  line-height: 64px;
}
.site-nav .page-link:hover { color: var(--accent); text-decoration: none; }
.site-nav .page-link:not(:last-child) { margin-right: 22px; }

/* ---- Footer -------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  color: var(--muted);
}
.site-footer .footer-heading,
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--accent); }

/* ---- Content elements ---------------------------------------------------- */
.page-content { padding: 42px 0; }

blockquote {
  color: var(--text);
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  padding: 14px 18px;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: normal;
  letter-spacing: 0;
}
blockquote > :last-child { margin-bottom: 0; }

pre, code {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 6px;
}
pre { padding: 14px 16px; }

table {
  border-collapse: collapse;
  width: 100%;
}
table th, table td { border: 1px solid var(--border); padding: 8px 12px; }
table th { background: var(--bg-alt); }

hr { border: 0; border-top: 1px solid var(--border); margin: 2em 0; }

/* ---- Buttons ------------------------------------------------------------- */
.btn {
  display: inline-block;
  padding: 11px 20px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: .98rem;
  line-height: 1;
  border: 1px solid transparent;
  transition: all .15s ease;
}
.btn + .btn { margin-left: 10px; }
.btn-primary { background: var(--accent); color: #fff !important; }
.btn-primary:hover { background: var(--accent-dark); text-decoration: none; color: #fff !important; }
.btn-outline { background: transparent; color: var(--accent) !important; border-color: var(--border); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent-dark) !important; text-decoration: none; }

/* ---- Hero ---------------------------------------------------------------- */
.hero {
  text-align: center;
  background: linear-gradient(180deg, var(--accent-soft), var(--bg));
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 48px 28px 42px;
  margin: 8px 0 40px;
}
.hero-logo { display: block; width: 100%; max-width: 300px; margin: 0 auto 22px; }
.hero h1 { font-size: 2.4rem; margin-bottom: .5em; }
.hero h1::after {
  content: "";
  display: block;
  width: 64px;
  height: 4px;
  margin: .55em auto 0;
  background: var(--gold);
  border-radius: 2px;
}
.hero .lead {
  color: var(--muted);
  font-size: 1.2rem;
  max-width: 640px;
  margin: 0 auto 1.4em;
}
.hero-actions { margin-bottom: 0; }

.lead { font-size: 1.15rem; color: var(--muted); }

/* ---- Feature grid -------------------------------------------------------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin: 1.4em 0 1.8em;
}
.feature {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 22px 20px;
  box-shadow: var(--shadow);
  transition: transform .15s ease, box-shadow .15s ease;
}
.feature:hover { transform: translateY(-2px); box-shadow: 0 4px 10px rgba(16,42,60,.08), 0 12px 28px rgba(16,42,60,.10); }
.feature h3 {
  margin: 0 0 .4em;
  font-size: 1.05rem;
  color: var(--accent-dark);
}
.feature p { margin: 0; color: var(--muted); font-size: .98rem; }
.feature p a { font-weight: 600; }

/* Per-card accent: coloured top edge + matching heading text.
   matplotlib tab10 palette, with the kingfisher gold on KAOS. */
.feature { border-top: 3px solid var(--c, var(--border)); }
.feature h3 { color: var(--c, var(--accent-dark)); }
.feature-cfd  { --c: #1f77b4; } /* tab:blue   */
.feature-kaos { --c: #c8962f; } /* gold       */
.feature-sw   { --c: #2ca02c; } /* tab:green  */
.feature-hpc  { --c: #d62728; } /* tab:red    */
.feature-auto { --c: #9467bd; } /* tab:purple */

/* ---- Responsive ---------------------------------------------------------- */
@media (max-width: 700px) {
  .hero { padding: 34px 18px; }
  .hero h1 { font-size: 1.8rem; }
  .hero .lead { font-size: 1.08rem; }
  .btn { display: block; text-align: center; }
  .btn + .btn { margin-left: 0; margin-top: 10px; }
}