:root {
  --bg: #ffffff;
  --panel: #f6f7fb;
  --text: #11131a;
  --muted: #4b5563;
  --link: #1d4ed8;
  --border: rgba(17,19,26,0.12);
  --shadow: 0 10px 30px rgba(0,0,0,0.10);
  --radius: 16px;
  --max: 900px;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";

  /* new helpers */
  --header-bg: rgba(255,255,255,0.75);
  --hover-bg: rgba(17,19,26,0.06);
  --card-bg: rgba(17,19,26,0.04);
  --card-bg-hover: rgba(17,19,26,0.06);
  --inline-code-bg: rgba(17,19,26,0.06);
  --prose-strong: rgba(17,19,26,0.92);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0c10;
    --panel: #11131a;
    --text: #e8eaf1;
    --muted: #a7adbd;
    --link: #8ab4ff;
    --border: rgba(255,255,255,0.10);
    --shadow: 0 10px 30px rgba(0,0,0,0.35);

    --header-bg: rgba(11, 12, 16, 0.75);
    --hover-bg: rgba(255,255,255,0.06);
    --card-bg: rgba(255,255,255,0.05);
    --card-bg-hover: rgba(255,255,255,0.07);
    --inline-code-bg: rgba(255,255,255,0.08);
    --prose-strong: rgba(232,234,241,0.92);
  }
}


* { box-sizing: border-box; }
html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg); /* solid base */
  color: var(--text);
  line-height: 1.55;
  position: relative;
}

/* Fixed gradient layer so it doesn't "move" as you scroll */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(1200px 900px at 20% -10%, rgba(29,78,216,0.10), transparent 55%),
    radial-gradient(900px 600px at 85% 0%, rgba(16,185,129,0.08), transparent 50%),
    var(--bg);
}

@media (prefers-color-scheme: dark) {
  body::before {
    background:
      radial-gradient(1200px 900px at 20% -10%, rgba(138,180,255,0.18), transparent 55%),
      radial-gradient(900px 600px at 85% 0%, rgba(144,255,200,0.12), transparent 50%),
      var(--bg);
  }
}



a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

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

.site-header {
  position: sticky;
  top: 0;
  background: var(--header-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  font-weight: 650;
  letter-spacing: 0.2px;
  color: var(--text);
}
.nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.nav a {
  color: var(--muted);
  padding: 8px 10px;
  border-radius: 12px;
}
.nav a.active, .nav a:hover {
  color: var(--text);
  background: var(--hover-bg);
  text-decoration: none;
}

.home {
  padding-top: 64px;
  padding-bottom: 64px;
}
.home h1 {
  font-size: 44px;
  margin: 0 0 10px 0;
  letter-spacing: -0.6px;
}
.lede {
  margin: 0 0 28px 0;
  color: var(--muted);
  font-size: 18px;
  max-width: 60ch;
}

.links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}
.card {
  display: block;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 16px;
  box-shadow: var(--shadow);
}
.card:hover {
  background: var(--card-bg-hover);
  text-decoration: none;
}
.label { display: block; font-weight: 650; color: var(--text); }
.hint { display: block; margin-top: 4px; color: var(--muted); font-size: 14px; }

.prose {
  padding-top: 36px;
  padding-bottom: 64px;
}
.prose h1 { font-size: 38px; margin-top: 6px; }
.prose h2 { margin-top: 28px; font-size: 22px; }
.prose p, .prose li { color: var(--prose-strong); }
.prose hr { border: none; border-top: 1px solid var(--border); margin: 28px 0; }
.prose code { background: var(--inline-code-bg); padding: 0.15em 0.35em; border-radius: 8px; }

.site-footer {
  margin-top: 30px;
  border-top: 1px solid var(--border);
  padding-top: 18px;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 820px) {
  .links { grid-template-columns: 1fr; }
  .home h1 { font-size: 36px; }
}

.identity {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.identity-photo {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  flex-shrink: 0;
}

.identity-text h1 {
  margin: 0;
}

.identity-text .lede {
  margin: 6px 0 0 0;
}

@media (max-width: 600px) {
  .identity {
    gap: 12px;
  }

  .identity-photo {
    width: 64px;
    height: 64px;
  }
}