/* ============================================================
   Vish Sangale — personal site redesign
   Aesthetic: editorial × technical. Serif display + mono utility.
   Light = warm paper. Dark = cosmic.
   ============================================================ */

:root {
  --bg: #f4efe6;
  --bg-2: #ebe4d6;
  --ink: #1a1814;
  --ink-2: #4a463e;
  --muted: #807868;
  --rule: #d6cdb9;
  --accent: oklch(58% 0.13 62);   /* burnt amber */
  --accent-2: oklch(55% 0.13 230); /* deep cobalt */
  --hl: #f7e6b8;

  --serif: "Source Serif 4", "Source Serif Pro", "Iowan Old Style", Georgia, serif;
  --sans: "Inter Tight", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --maxw: 1180px;
  --gutter: clamp(20px, 4vw, 56px);
}

[data-theme="dark"] {
  --bg: #0c0d12;
  --bg-2: #14161e;
  --ink: #ebe7dd;
  --ink-2: #b9b3a4;
  --muted: #7a7666;
  --rule: #23262f;
  --accent: oklch(72% 0.13 62);
  --accent-2: oklch(72% 0.13 230);
  --hl: #2a2410;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color 0.4s ease, color 0.4s ease;
}

a { color: inherit; text-decoration: none; }
a.link {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  text-decoration-color: var(--rule);
  transition: text-decoration-color 0.2s;
}
a.link:hover { text-decoration-color: var(--accent); }

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

.mono { font-family: var(--mono); font-feature-settings: "ss01"; }
.sans { font-family: var(--sans); }
.serif { font-family: var(--serif); }
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.rule { border: 0; border-top: 1px solid var(--rule); margin: 0; }
.hairline { border: 0; border-top: 1px solid var(--rule); }

/* ---------- Layout shell ---------- */
.shell {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------- Top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--bg) 92%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 56px;
}
.brand {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  display: flex; align-items: center; gap: 10px;
}
.brand-dot {
  display: inline-block; width: 10px; height: 10px;
  background: var(--accent); border-radius: 999px;
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--accent) 22%, transparent);
}
.nav { display: flex; align-items: center; gap: 28px; }
.nav a {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-2);
  position: relative;
  padding: 4px 0;
}
.nav a:hover, .nav a.is-active { color: var(--ink); }
.nav a.is-active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px;
  height: 2px; background: var(--accent);
}
.theme-toggle {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em;
  background: transparent; border: 1px solid var(--rule);
  color: var(--ink-2);
  padding: 6px 10px; border-radius: 999px; cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.theme-toggle:hover { border-color: var(--ink-2); color: var(--ink); }
.theme-toggle .dot {
  width: 8px; height: 8px; border-radius: 999px;
  background: var(--ink);
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--rule);
  margin-top: 120px;
  padding: 48px 0 64px;
}
.footer-inner {
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px;
  font-family: var(--mono); font-size: 12px; color: var(--ink-2);
}
.footer h4 {
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--muted); margin: 0 0 14px;
}
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.footer-colophon { max-width: 360px; line-height: 1.6; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em;
  padding: 10px 16px; border-radius: 999px;
  border: 1px solid var(--ink); color: var(--ink);
  background: transparent; cursor: pointer;
  transition: background 0.2s, color 0.2s, transform 0.2s;
}
.btn:hover { background: var(--ink); color: var(--bg); transform: translateY(-1px); }
.btn-ghost { border-color: var(--rule); color: var(--ink-2); }
.btn-ghost:hover { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn-arrow { transition: transform 0.2s; }
.btn:hover .btn-arrow { transform: translateX(3px); }

/* ---------- Tags / chips ---------- */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.04em;
  padding: 3px 8px; border: 1px solid var(--rule); border-radius: 4px;
  color: var(--ink-2); background: transparent;
}
.chip.solid {
  background: var(--ink); color: var(--bg); border-color: var(--ink);
}

/* ---------- Selection ---------- */
::selection { background: var(--hl); color: var(--ink); }

/* ---------- Reduce motion ---------- */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}