/* =========================================================
   Rene van Pelt — shared styles
   Themes: paper (warm), ink (cool), mono (achromatic)
   Type pairings: editorial (Newsreader + Inter Tight),
                  modern (Fraunces-ish via Newsreader italic + Inter Tight),
                  quiet (Inter Tight only, different weights)
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter+Tight:wght@300;400;500;600;700&family=Newsreader:ital,opsz,wght@0,6..72,300;0,6..72,400;0,6..72,500;0,6..72,600;1,6..72,300;1,6..72,400;1,6..72,500&family=Instrument+Serif:ital@0;1&display=swap');

:root {
  /* ---------- Paper (default, warm) ---------- */
  --bg:        #F4EFE6;
  --bg-soft:   #EBE4D6;
  --surface:   #FAF6EE;
  --ink:       #1E1A14;
  --ink-soft:  #4A4236;
  --ink-mute:  #8A8170;
  --rule:      #D9D1BF;
  --rule-soft: #E6DFCE;
  --accent:    #7A3E16;    /* deep sepia */
  --accent-soft: #B8854A;

  /* ---------- Type pair: editorial ---------- */
  --font-body: 'Inter Tight', system-ui, sans-serif;
  --font-display: 'Newsreader', Georgia, serif;
  --font-italic: 'Newsreader', Georgia, serif;

  /* ---------- Density ---------- */
  --density: 1;           /* 0.85 compact, 1 default, 1.2 spacious */
  --base-size: 17px;
  --line: 1.65;
  --max-text: 640px;
  --max-page: 1240px;

  /* ---------- Figure style ---------- */
  --fig-stroke: 1.25px;
  --fig-fill: rgba(0,0,0,0.03);
}

/* ------- Ink (cool) ------- */
html[data-theme="ink"] {
  --bg:        #F3F4F6;
  --bg-soft:   #E6E8ED;
  --surface:   #FAFBFC;
  --ink:       #0E1220;
  --ink-soft:  #313749;
  --ink-mute:  #767C8C;
  --rule:      #CED2DB;
  --rule-soft: #DFE2E9;
  --accent:    #1B3A6B;
  --accent-soft: #4E6E9E;
}

/* ------- Mono (achromatic) ------- */
html[data-theme="mono"] {
  --bg:        #F7F7F7;
  --bg-soft:   #EDEDED;
  --surface:   #FFFFFF;
  --ink:       #0F0F0F;
  --ink-soft:  #3A3A3A;
  --ink-mute:  #8A8A8A;
  --rule:      #D6D6D6;
  --rule-soft: #E6E6E6;
  --accent:    #111111;
  --accent-soft: #555555;
}

/* ------- Type pairs ------- */
html[data-type="modern"] {
  --font-body: 'Inter Tight', system-ui, sans-serif;
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-italic: 'Instrument Serif', Georgia, serif;
}
html[data-type="quiet"] {
  --font-body: 'Inter Tight', system-ui, sans-serif;
  --font-display: 'Inter Tight', system-ui, sans-serif;
  --font-italic: 'Inter Tight', system-ui, sans-serif;
}

/* ------- Density ------- */
html[data-density="compact"] { --density: 0.85; --base-size: 15.5px; --line: 1.55; }
html[data-density="spacious"] { --density: 1.18; --base-size: 18px; --line: 1.75; }

/* ------- Figure style ------- */
html[data-fig="filled"] { --fig-fill: currentColor; --fig-stroke: 0px; }
html[data-fig="dashed"] { --fig-stroke: 1.25px; }

/* =========================================================
   Base
   ========================================================= */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--base-size);
  line-height: var(--line);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11";
}

a { color: inherit; text-decoration: none; }
a.link {
  border-bottom: 1px solid var(--rule);
  padding-bottom: 1px;
  transition: border-color 160ms ease, color 160ms ease;
}
a.link:hover { border-bottom-color: var(--ink); }

em, i { font-family: var(--font-italic); font-style: italic; font-weight: 400; letter-spacing: 0.005em; }

::selection { background: var(--ink); color: var(--bg); }

/* =========================================================
   Layout primitives
   ========================================================= */
.page {
  max-width: 1080px;
  margin: 0 auto;
  padding: calc(48px * var(--density)) calc(56px * var(--density));
}
@media (max-width: 720px) {
  .page { padding: 32px 24px; }
}

.rule { border: 0; border-top: 1px solid var(--rule); margin: 0; }
.rule-soft { border: 0; border-top: 1px solid var(--rule-soft); margin: 0; }

/* =========================================================
   Top bar
   ========================================================= */
.topbar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-bottom: calc(36px * var(--density));
  border-bottom: 1px solid var(--rule);
}
.wordmark {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 400;
  letter-spacing: 0.005em;
  font-style: italic;
}
.wordmark .dot { color: var(--accent); }
.nav {
  display: flex;
  gap: 28px;
  font-size: 0.88rem;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}
.nav a { transition: color 160ms ease; }
.nav a:hover { color: var(--ink); }
.nav a.current { color: var(--ink); }

/* =========================================================
   Footer
   ========================================================= */
.footer {
  margin-top: calc(80px * var(--density));
  padding-top: calc(28px * var(--density));
  padding-bottom: calc(20px * var(--density));
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  color: var(--ink-mute);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
}
.footer .social { display: flex; gap: 18px; }
.footer a:hover { color: var(--ink); }

/* =========================================================
   Tweaks panel
   ========================================================= */