/* Tek yazı tipi (IBM Plex Mono), tek renk (--ink). Hiyerarşi yalnız ölçü, ağırlık ve boşlukla kurulur. */

:root {
  --bg: #0c0c0c;
  --ink: #e6e6e3;
  --rule: rgba(230, 230, 227, 0.16);
  --dim: rgba(230, 230, 227, 0.62);
  --pad: clamp(22px, 5vw, 40px);
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; overflow-x: clip; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 15px/1.7 "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  -webkit-font-smoothing: antialiased;
}

.sheet {
  max-width: 940px;
  margin-inline: auto;
  padding: clamp(26px, 5vh, 56px) var(--pad) calc(clamp(26px, 5vh, 56px) + env(safe-area-inset-bottom));
}

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: clamp(26px, 5vw, 40px) 0;
}

header, footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 20px;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
footer { color: var(--dim); }

.kicker {
  margin: 0 0 clamp(18px, 3vw, 26px);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--dim);
}

h1 {
  margin: 0;
  font-weight: 500;
  font-size: clamp(1.45rem, 1.05rem + 1.9vw, 2.35rem);
  line-height: 1.28;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

.body {
  margin: clamp(22px, 3.5vw, 30px) 0 0;
  max-width: 58ch;
  color: var(--dim);
}
.open .body:first-of-type { color: var(--ink); }

/* ---------- Index ---------- */

.index { list-style: none; margin: 0; padding: 0; }

.index li {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 0 16px;
  padding: clamp(18px, 2.6vw, 24px) 0;
  border-top: 1px solid var(--rule);
}
.index li:first-child { border-top: 0; padding-top: 0; }
.index li:last-child { padding-bottom: 0; }

.n {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--dim);
  padding-top: 0.32em;
}

.index h2 {
  margin: 0 0 0.5em;
  font-weight: 500;
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.index p { margin: 0; max-width: 58ch; color: var(--dim); }

.close .body { margin-top: 0; }

@media (max-width: 460px) {
  .index li { grid-template-columns: 34px minmax(0, 1fr); gap: 0 12px; }
}

/* ---------- Şekil: harmonograf eğrisi ---------- */
/* Süs değil, belgedeki bir şekil gibi davranır: kendi numarası ve altyazısı vardır. */

.open { display: grid; gap: clamp(30px, 5vw, 48px); align-items: start; }
@media (min-width: 800px) {
  .open { grid-template-columns: minmax(0, 1fr) minmax(230px, 290px); gap: 0 clamp(36px, 5vw, 64px); }
  .plate { position: sticky; top: 40px; }
}

.plate { margin: 0; display: grid; gap: 12px; justify-items: center; }
.plate img {
  display: block;
  width: min(100%, 260px);
  height: auto;
  opacity: 0.92;
  animation: turn 240s linear infinite;
}
.plate figcaption {
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--dim);
}

@keyframes turn { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) { .plate img { animation: none; } }