/* ============================================================
   Sightsee-ion — SIPES
   Minimal literary journal × physics-lab notebook
   Design notes:
   - Positive polarity (dark on light): Piepenbrock et al. 2014
   - Measure ≈ 30–34 CJK chars/line: adapted from Dyson & Haselgrove 2001
   ============================================================ */

:root {
  --paper: #faf8f3;
  --paper-deep: #f1ede3;
  --ink: #211f1c;
  --ink-soft: #5c574e;
  --hairline: #d8d2c4;
  --accent: #b23a23;          /* emission-line red */
  --accent-dim: #b23a2322;
  --mono: "IBM Plex Mono", "SF Mono", Menlo, Consolas, monospace;
  --serif: "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --measure: 34rem;           /* ≈ 30 CJK chars at 18px */
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.95;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent); color: var(--paper); }

a { color: inherit; text-decoration: none; }

/* ---------- spectral line motif ---------- */
.spectrum {
  height: 6px;
  background:
    linear-gradient(90deg,
      transparent 0 8%,   var(--ink) 8% 8.4%,
      transparent 8.4% 23%, var(--accent) 23% 23.6%,
      transparent 23.6% 31%, var(--ink) 31% 31.2%,
      transparent 31.2% 47%, var(--ink) 47% 47.5%,
      transparent 47.5% 58%, var(--accent) 58% 58.3%,
      transparent 58.3% 71%, var(--ink) 71% 71.6%,
      transparent 71.6% 84%, var(--ink) 84% 84.2%,
      transparent 84.2% 93%, var(--accent) 93% 93.5%,
      transparent 93.5% 100%);
  opacity: .85;
}

/* ---------- header ---------- */
.site-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: .5rem 1.5rem;
  padding: 1.4rem clamp(1.2rem, 5vw, 4rem);
  border-bottom: 1px solid var(--hairline);
}
.site-head .logo {
  font-family: var(--mono);
  font-size: .95rem;
  letter-spacing: .08em;
}
.site-head .logo b { color: var(--accent); }
.site-head nav {
  font-family: var(--mono);
  font-size: .78rem;
  display: flex;
  gap: 1.6rem;
}
.site-head nav a:hover { color: var(--accent); }

/* ---------- generic meta label ---------- */
.meta {
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .06em;
  color: var(--ink-soft);
}
.meta .code { color: var(--accent); }

/* ---------- home: hero ---------- */
.hero {
  padding: clamp(3rem, 9vw, 7rem) clamp(1.2rem, 5vw, 4rem) 3.5rem;
  border-bottom: 1px solid var(--hairline);
}
.hero h1 {
  font-size: clamp(2rem, 6vw, 3.6rem);
  font-weight: 900;
  letter-spacing: .04em;
  line-height: 1.25;
}
.hero .sub {
  font-family: var(--mono);
  font-size: clamp(.8rem, 2vw, .95rem);
  color: var(--ink-soft);
  margin-top: .8rem;
}
.hero .sub b { color: var(--accent); font-weight: 400; }
.hero p.lead {
  max-width: var(--measure);
  margin-top: 2.2rem;
  color: var(--ink-soft);
}
.hero .actions { margin-top: 2.4rem; display: flex; gap: 1rem; flex-wrap: wrap; }
.btn {
  font-family: var(--mono);
  font-size: .78rem;
  padding: .55rem 1.1rem;
  border: 1px solid var(--ink);
  transition: all .15s ease;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn.primary { background: var(--ink); color: var(--paper); }
.btn.primary:hover { background: var(--accent); border-color: var(--accent); }

/* ---------- home: sections ---------- */
section.block {
  padding: 3.2rem clamp(1.2rem, 5vw, 4rem);
  border-bottom: 1px solid var(--hairline);
}
.block-label {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 2rem;
}
.block-label::before { content: "✴︎ "; color: var(--accent); }

/* ---------- flavors grid ---------- */
.flavors {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}
.flavor {
  background: var(--paper);
  padding: 1.3rem 1.2rem 1.5rem;
  display: block;
  transition: background .15s ease;
}
.flavor:hover { background: var(--paper-deep); }
.flavor .code {
  font-family: var(--mono);
  font-size: 1.05rem;
  color: var(--accent);
}
.flavor .code small { color: var(--ink-soft); font-size: .68rem; margin-left: .4rem; }
.flavor h3 { font-size: .95rem; font-weight: 700; margin-top: .5rem; }
.flavor p { font-size: .78rem; color: var(--ink-soft); margin-top: .3rem; line-height: 1.7; }
.flavor.empty { opacity: .45; }
.flavor.empty:hover { background: var(--paper); }

/* ---------- measurement log (article list) ---------- */
.log { list-style: none; max-width: 56rem; }
.log li { border-bottom: 1px dashed var(--hairline); }
.log li:last-child { border-bottom: none; }
.log a {
  display: grid;
  grid-template-columns: 7.5rem 5.5rem 1fr;
  gap: 1.2rem;
  align-items: baseline;
  padding: .85rem .3rem;
  transition: background .15s ease;
}
.log a:hover { background: var(--paper-deep); }
.log .date, .log .cat { font-family: var(--mono); font-size: .72rem; color: var(--ink-soft); }
.log .cat { color: var(--accent); }
.log .t { font-size: .98rem; }
@media (max-width: 560px) {
  .log a { grid-template-columns: 1fr; gap: .1rem; }
}

/* ---------- featured card ---------- */
.featured {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 2.5rem;
  align-items: center;
  max-width: 62rem;
}
@media (max-width: 760px) { .featured { grid-template-columns: 1fr; } }
.featured img {
  width: 100%;
  display: block;
  filter: saturate(.92);
  border: 1px solid var(--hairline);
}
.featured h3 { font-size: 1.5rem; margin: .6rem 0 1rem; font-weight: 800; }
.featured blockquote {
  max-width: var(--measure);
  color: var(--ink-soft);
  border-left: 2px solid var(--accent);
  padding-left: 1.1rem;
  font-size: .92rem;
}
.featured .more {
  display: inline-block;
  margin-top: 1.4rem;
  font-family: var(--mono);
  font-size: .76rem;
  border-bottom: 1px solid var(--accent);
  padding-bottom: .15rem;
}
.featured .more:hover { color: var(--accent); }

/* ---------- about ---------- */
.about { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; max-width: 62rem; }
@media (max-width: 700px) { .about { grid-template-columns: 1fr; } }
.about .cv p { margin-bottom: .4rem; font-size: .92rem; }
.about .cv .meta { margin-bottom: 1.1rem; }
.kafka {
  margin-top: 2.6rem;
  max-width: var(--measure);
  font-size: .9rem;
  color: var(--ink-soft);
}
.kafka em { font-style: normal; font-weight: 700; color: var(--ink); }

/* ---------- footer ---------- */
footer {
  padding: 2.2rem clamp(1.2rem, 5vw, 4rem) 3rem;
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--ink-soft);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
footer .desire { color: var(--accent); }

/* ---------- article page ---------- */
.article {
  max-width: var(--measure);
  margin: 0 auto;
  padding: clamp(2.5rem, 7vw, 5rem) 1.2rem 4rem;
}
.article .meta { margin-bottom: 1.2rem; }
.article h1 {
  font-size: clamp(1.5rem, 4.5vw, 2.1rem);
  font-weight: 900;
  line-height: 1.45;
  margin-bottom: .8rem;
}
.article .dedication { color: var(--ink-soft); font-size: .9rem; margin-bottom: .5rem; }
.article .body { margin-top: 2.4rem; }
.article .body p { margin-bottom: 1.5rem; text-align: justify; }
.article .body p.verse { text-align: left; font-weight: 700; margin-bottom: .2rem; }
.article .body p.caption {
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--ink-soft);
  text-align: center;
  margin: -1rem 0 2rem;
}
.article .body .sep {
  text-align: center;
  color: var(--accent);
  font-family: var(--mono);
  margin: 2.2rem 0;
  border: none;
}
.article .body .sep::after { content: "· · ✴︎ · ·"; letter-spacing: .35em; font-size: .8rem; }
.article .body img {
  max-width: 100%;
  display: block;
  margin: 2rem auto;
  border: 1px solid var(--hairline);
}
.article .body blockquote {
  border-left: 2px solid var(--accent);
  padding-left: 1.1rem;
  margin: 1.8rem 0;
  color: var(--ink-soft);
  font-size: .94rem;
}
.article .body .note {
  font-size: .85rem;
  color: var(--ink-soft);
  border-top: 1px dashed var(--hairline);
  padding-top: 1.2rem;
  margin-top: 2.5rem;
}
.article .body strong { font-weight: 800; }
.article .body em.voice { font-weight: 700; font-style: normal; color: var(--accent); }
.article .body a { border-bottom: 1px solid var(--accent); }
.article .body a:hover { color: var(--accent); }
.article .body h2 {
  font-size: 1.15rem;
  margin: 2.4rem 0 1.2rem;
  font-weight: 800;
}

/* prev / next */
.prevnext {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 1.6rem 1.2rem 3rem;
  border-top: 1px solid var(--hairline);
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  font-family: var(--mono);
  font-size: .76rem;
}
.prevnext a { color: var(--ink-soft); max-width: 45%; }
.prevnext a:hover { color: var(--accent); }
.prevnext .next { text-align: right; margin-left: auto; }

/* ---------- archive page ---------- */
.archive-wrap { padding: clamp(2.5rem, 7vw, 5rem) clamp(1.2rem, 5vw, 4rem) 4rem; }
.archive-wrap h1 { font-size: clamp(1.6rem, 5vw, 2.4rem); font-weight: 900; margin-bottom: .6rem; }
.archive-wrap .meta { margin-bottom: 2.5rem; }