/* Letters — reading layout for starheart.ai essays. */

@font-face { font-family:'Cormorant Garamond'; font-style:normal; font-weight:300; font-display:block; src:url(/fonts/cormorant-light.woff2) format('woff2'); }
@font-face { font-family:'Cormorant Garamond'; font-style:italic; font-weight:300; font-display:block; src:url(/fonts/cormorant-light.woff2) format('woff2'); }
@font-face { font-family:'Cormorant Garamond'; font-style:normal; font-weight:400; font-display:block; src:url(/fonts/cormorant-regular.woff2) format('woff2'); }
@font-face { font-family:'Cormorant Garamond'; font-style:italic; font-weight:400; font-display:block; src:url(/fonts/cormorant-regular.woff2) format('woff2'); }
@font-face { font-family:'Cormorant Garamond'; font-style:normal; font-weight:600; font-display:block; src:url(/fonts/cormorant-regular.woff2) format('woff2'); }
@font-face { font-family:'Instrument Sans'; font-style:normal; font-weight:500; font-display:block; src:url(/fonts/instrument-sans.woff2) format('woff2'); }
@font-face { font-family:'Instrument Sans'; font-style:normal; font-weight:600; font-display:block; src:url(/fonts/instrument-sans.woff2) format('woff2'); }

:root {
  --void: #06060c;
  --void-warm: #0a0a10;
  --light: #F0E6C8;
  --light-dim: #C4B48A;
  --light-faint: #887a60;
  --light-ghost: rgba(240, 230, 200, 0.06);
  --light-glow: rgba(240, 230, 200, 0.03);
  --text: #c8c0b0;
  --text-muted: #877e76;
  --serif: 'Cormorant Garamond', Georgia, serif;
  --sans: 'Instrument Sans', system-ui, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%, var(--light-glow), transparent 60%),
    var(--void);
  color: var(--text);
  font-family: var(--serif);
  -webkit-font-smoothing: antialiased;
  line-height: 1.9;
  min-height: 100vh;
}
:focus-visible { outline: 1px solid var(--light-dim); outline-offset: 3px; }

/* ── Home mark ── */
.home {
  position: fixed; top: 1.5rem; left: 1.75rem; z-index: 10;
  display: flex; align-items: center; gap: 0.6rem; text-decoration: none; color: var(--light-faint);
}
.home img {
  width: 22px; height: 22px;
  filter: brightness(0) saturate(100%) invert(92%) sepia(14%) saturate(577%) hue-rotate(6deg) brightness(101%) contrast(91%);
  opacity: 0.75; transition: opacity 0.3s;
}
.home span { font-family: var(--sans); font-size: 0.62rem; font-weight: 600; letter-spacing: 0.28em; text-transform: uppercase; transition: color 0.3s; }
.home:hover span { color: var(--light); }
.home:hover img { opacity: 1; }

/* ── Layout ── */
.wrap { max-width: 40rem; margin: 0 auto; padding: 9rem 1.75rem 6rem; }

.eyebrow {
  font-family: var(--sans); font-size: 0.65rem; font-weight: 600;
  letter-spacing: 0.3em; text-transform: uppercase; color: var(--light-faint);
  margin-bottom: 1.75rem;
}

h1 { font-size: clamp(2.2rem, 5vw, 3rem); font-weight: 300; color: var(--light); line-height: 1.2; letter-spacing: -0.01em; }

/* ── Essay ── */
.letter-meta {
  font-family: var(--sans); font-size: 0.68rem; letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--text-muted); margin: 1.25rem 0 3rem;
}
.letter h2 { font-size: 1.7rem; font-weight: 400; color: var(--light); margin: 3rem 0 1rem; line-height: 1.3; }
.letter h3 { font-size: 1.3rem; font-weight: 500; color: var(--light-dim); margin: 2.25rem 0 0.75rem; }
.letter p { font-size: 1.2rem; margin-bottom: 1.5rem; }
.letter p:first-of-type::first-letter {
  font-size: 3.4rem; line-height: 0.9; float: left; padding: 0.1em 0.12em 0 0;
  color: var(--light-dim); font-weight: 400;
}
.letter a { color: var(--light-dim); text-decoration: underline; text-decoration-color: var(--light-faint); text-underline-offset: 3px; }
.letter a:hover { color: var(--light); }
.letter strong { color: var(--light-dim); font-weight: 500; }
.letter em { font-style: italic; }
.letter hr { border: none; width: 60px; height: 1px; background: var(--light); opacity: 0.15; margin: 3rem auto; }

.letter blockquote {
  margin: 2.5rem 0; padding-left: 1.5rem; border-left: 1px solid var(--light-ghost);
}
.letter blockquote p {
  font-size: 1.35rem; font-style: italic; font-weight: 300; color: var(--light-dim); line-height: 1.65;
}
.letter blockquote cite {
  display: block; margin-top: 0.5rem; font-family: var(--sans); font-size: 0.68rem; font-style: normal;
  letter-spacing: 0.15em; text-transform: uppercase; color: var(--light-faint);
}

.back {
  display: inline-block; margin-top: 3.5rem;
  font-family: var(--sans); font-size: 0.7rem; font-weight: 500; letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--light-faint); text-decoration: none; transition: color 0.3s;
}
.back:hover { color: var(--light); }

/* ── Index ── */
.index .letters-intro { font-size: 1.25rem; font-style: italic; color: var(--light-faint); margin: 1.25rem 0 3rem; }
.index .empty { font-size: 1.35rem; font-style: italic; color: var(--light-faint); line-height: 1.8; margin: 2rem 0 3rem; }
.letter-list { list-style: none; }
.letter-list li { border-top: 1px solid var(--light-ghost); }
.letter-list li:last-child { border-bottom: 1px solid var(--light-ghost); }
.letter-list a {
  display: block; padding: 1.75rem 0; text-decoration: none; color: inherit;
  transition: padding-left 0.3s;
}
.letter-list a:hover { padding-left: 0.5rem; }
.lt-date { display: block; font-family: var(--sans); font-size: 0.6rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 0.5rem; }
.lt-title { display: block; font-size: 1.6rem; font-weight: 400; color: var(--light); line-height: 1.3; }
.lt-sum { display: block; font-size: 1.05rem; color: var(--text-muted); margin-top: 0.4rem; font-style: italic; }

@media (max-width: 768px) {
  .home { top: 1.1rem; left: 1.1rem; }
  .wrap { padding: 7rem 1.35rem 4rem; }
  .letter p { font-size: 1.12rem; }
}