/* INSTAR - periodical amber. ASCII only. v1.1.0 */
:root {
  --bg: #080705;
  --bg-2: #100e0b;
  --ink: #e8dcc8;
  --mute: #8a8070;
  --faint: #5c564c;
  --accent: #c4a36a;
  --accent-2: #8b4030;
  --paper: #14110d;
  --line: rgba(196, 163, 106, 0.18);
  --ok: #9bb37a;
  --danger: #c45a48;
  --font-display: "Clash Display", "Satoshi", system-ui, sans-serif;
  --font-sans: "Satoshi", system-ui, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "Segoe UI Mono", monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --motion-dur-instant: 50ms;
  --motion-dur-fast: 120ms;
  --motion-dur-base: 200ms;
  --motion-dur: 200ms;
  --motion-dur-slow: 320ms;
  --motion-dur-shed: 720ms;
  --motion-ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --motion-ease: var(--motion-ease-out);
  --motion-ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --motion-ease-spring: cubic-bezier(0.34, 1.45, 0.64, 1);
  --motion-distance: 8px;
  --motion-scale: 0.97;
  --depth-wash: 0.07;
  --surface-grain-opacity: 0.055;
  color-scheme: dark;
}

html[data-depth="3"],
html[data-depth="4"] { --depth-wash: 0.1; }
html[data-depth="5"],
html[data-depth="6"] {
  --depth-wash: 0.12;
  --accent: #cdb07a;
}
html[data-depth="7"],
html[data-depth="8"] {
  --depth-wash: 0.15;
  --accent: #d4b57a;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
html { background: var(--bg); color: var(--ink); }
body {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.55;
  background:
    radial-gradient(900px 500px at 50% -10%, rgba(196, 163, 106, var(--depth-wash)), transparent 55%),
    var(--bg);
  min-height: 100vh;
}

body::before {
  content: "";
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 40;
  opacity: var(--surface-grain-opacity);
  background: url("/media/grain.png") repeat;
  background-size: 192px 192px;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--ink); }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
:focus-visible {
  box-shadow: 0 0 0 5px var(--bg);
}
input:focus, textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  scroll-margin-top: 88px;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
}
.skip:focus { left: 12px; top: 12px; background: var(--bg-2); padding: 8px 12px; z-index: 50; }

.sr,
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.top {
  position: relative;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
}
.brand-island {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 4px 12px 4px 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(8, 7, 5, 0.55);
}
.x-follow {
  display: inline-flex;
  align-items: center;
  height: 28px;
  max-height: 28px;
  flex-shrink: 0;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  text-decoration: none;
  overflow: hidden;
}
.x-follow-mark {
  width: 24px;
  height: 24px;
  max-width: 24px;
  max-height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.x-follow-mark svg { width: 11px; height: 11px; max-width: 11px; max-height: 11px; fill: var(--ink); }
.wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.22em;
  font-size: 0.72rem;
  text-decoration: none;
  color: var(--ink);
}
.nav {
  display: flex;
  gap: 18px;
  align-items: center;
}
.nav a {
  color: var(--mute);
  text-decoration: none;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.nav a[aria-current="page"], .nav a:hover { color: var(--ink); }

.hello {
  min-height: calc(100vh - 72px);
  display: grid;
  place-items: center;
  padding: 8vh 24px 16vh;
  text-align: center;
  position: relative;
}
.hello::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 42vh;
  background:
    linear-gradient(to top, rgba(8,7,5,0.2), var(--bg)),
    url("/media/hero-soil.jpg") center 30% / cover no-repeat;
  opacity: 0.38;
  pointer-events: none;
  mask-image: linear-gradient(to top, black 20%, transparent 100%);
}
.hello-inner { position: relative; z-index: 1; }
.hello h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(4.6rem, 16vw, 9.5rem);
  letter-spacing: -0.045em;
  margin: 0;
  line-height: 0.86;
  color: var(--ink);
  text-shadow: 0 20px 60px rgba(0,0,0,0.45);
}
.seal {
  width: min(168px, 42vw);
  height: auto;
  margin: 2.4rem auto 0;
  border-radius: 50%;
  display: block;
  animation: breathe 7s var(--ease) infinite;
  filter: drop-shadow(0 18px 28px rgba(0,0,0,0.55));
}
.seal[data-depth="3"],
.seal[data-depth="4"],
.seal[data-depth="5"] {
  filter: drop-shadow(0 18px 32px rgba(0,0,0,0.6)) saturate(1.08);
}
.seal[data-depth="6"],
.seal[data-depth="7"],
.seal[data-depth="8"] {
  filter: drop-shadow(0 0 28px rgba(196, 163, 106, 0.32));
}
@keyframes breathe {
  0%, 100% { transform: scale(1); opacity: 0.92; }
  50% { transform: scale(1.025); opacity: 1; }
}
.whisper {
  margin-top: 2.2rem;
  color: var(--faint);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.wrap {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
  padding: 12px 0 80px;
  position: relative;
  z-index: 1;
}
.chamber {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: start;
  padding-top: 18px;
}
@media (max-width: 860px) {
  .chamber { grid-template-columns: 1fr; gap: 28px; }
  .top { flex-wrap: wrap; }
}
.kicker {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 10px;
}
h1.stage {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.02;
  margin: 0 0 18px;
}
.lede { color: var(--mute); max-width: 38rem; }
.cipher {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  letter-spacing: 0.18em;
  padding: 18px 20px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--accent);
  overflow-x: auto;
  margin: 22px 0;
}
.coords {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 8px;
}
.coords code {
  font-family: var(--font-mono);
  border: 1px solid var(--line);
  padding: 8px 12px;
  color: var(--accent);
}
label.field {
  display: block;
  margin-top: 22px;
  color: var(--mute);
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
input[type="text"],
input[type="number"],
textarea,
select.field-ctl {
  width: 100%;
  margin-top: 8px;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 14px 14px;
  font: 500 1rem var(--font-mono);
  min-height: 44px;
}
select.field-ctl { font-family: var(--font-sans); letter-spacing: 0.04em; }
textarea { min-height: 140px; resize: vertical; }
.row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 12px;
  align-items: center;
}
button, .btn {
  appearance: none;
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--ink);
  font-family: var(--font-sans);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.78rem;
  padding: 12px 16px;
  min-height: 44px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition:
    background var(--motion-dur-fast) var(--motion-ease),
    color var(--motion-dur-fast) var(--motion-ease),
    transform var(--motion-dur-instant) var(--motion-ease);
}
button:hover, .btn:hover { background: color-mix(in srgb, var(--accent) 16%, transparent); }
button:active, .btn:active { transform: scale(var(--motion-scale)); }
.note {
  margin-top: 18px;
  color: var(--mute);
  font-size: 0.95rem;
}
.ok { color: var(--ok); }
.bad { color: var(--danger); }
.relic img, .relic audio {
  width: 100%;
  display: block;
  border: 1px solid var(--line);
}
.relic figcaption {
  color: var(--faint);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 10px;
}
.brief {
  border-top: 1px solid var(--line);
  margin-top: 36px;
  padding-top: 22px;
}
.brief h2 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  margin: 0 0 10px;
}
.brief[hidden] { display: none; }

.work-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 28px;
}
@media (max-width: 800px) { .work-grid { grid-template-columns: 1fr; } }
.tools {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.tools button {
  justify-content: flex-start;
  border-color: var(--line);
  width: 100%;
}
.tools button[aria-selected="true"],
.tools button[aria-pressed="true"] {
  border-color: var(--accent);
  color: var(--accent);
}
.tools kbd {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--faint);
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
}
.panel[hidden] { display: none; }
canvas.spec,
canvas.plane {
  width: 100%;
  height: 220px;
  background: #000;
  border: 1px solid var(--line);
  image-rendering: pixelated;
}
canvas.plane { height: auto; max-height: 360px; object-fit: contain; }

.runes {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.45;
  letter-spacing: 0.12em;
  color: var(--accent);
}
.rune-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
.rune-table th, .rune-table td {
  border-bottom: 1px solid var(--line);
  padding: 8px 6px;
  text-align: left;
}
.progress {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1px solid var(--accent);
}
.dot.on { background: var(--accent); }

.foot {
  position: relative;
  z-index: 5;
  padding: 28px 22px 40px;
  color: var(--faint);
  font-size: 0.82rem;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}
.hits-counter, [data-hits] { color: var(--faint) !important; font-size: 0.82rem; }

.manual article {
  border-top: 1px solid var(--line);
  padding: 22px 0;
}
.manual article.locked { opacity: 0.38; }
.manual article.locked .dig { display: none; }
.manual h2 { font-family: var(--font-display); font-size: 1.5rem; margin: 0 0 8px; }
.manual article.just-open {
  animation: emerge-in var(--motion-dur-shed) var(--motion-ease-out);
}
.dig {
  margin-top: 14px;
  border: 1px solid var(--line);
  padding: 4px 14px 10px;
  background: color-mix(in srgb, var(--paper) 80%, transparent);
}
.dig summary {
  cursor: pointer;
  list-style: none;
  min-height: 44px;
  display: flex;
  align-items: center;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: var(--accent);
}
.dig summary::-webkit-details-marker { display: none; }
.dig p { color: var(--mute); }

/* --- v1.1 molt depth, laboratory, atmosphere --- */
.molt-rail {
  position: fixed;
  left: 6px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 6;
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 0;
}
body.has-rail .molt-rail { display: flex; }
.molt-rail::before {
  content: "";
  position: absolute;
  top: 18px;
  bottom: 18px;
  width: 1px;
  background: var(--line);
  z-index: 0;
}
.molt-rail a,
.molt-rail > span {
  position: relative;
  z-index: 1;
  width: 44px;
  height: 28px;
  display: grid;
  place-items: center;
  text-decoration: none;
  overflow: hidden;
}
.molt-rail .sr,
.molt-rail .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}
.molt-rail a::after,
.molt-rail > span::after {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--accent) 55%, transparent);
  background: transparent;
}
.molt-rail > span::after { opacity: 0.35; }
.molt-rail a.on::after { background: var(--accent); border-color: var(--accent); }
.molt-rail a.now::after {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 32%, transparent);
  animation: tick-now 2.8s var(--ease) infinite;
}
@keyframes tick-now {
  0%, 100% { box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent); }
  50% { box-shadow: 0 0 0 5px color-mix(in srgb, var(--accent) 40%, transparent); }
}

.guide-line {
  position: relative;
  z-index: 5;
  margin: 0;
  padding: 0 22px 10px 72px;
  color: var(--faint);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
body.page-hello .guide-line { text-align: center; padding-left: 22px; }

.habits {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
.habits button {
  min-height: 36px;
  padding: 6px 10px;
  font-size: 0.68rem;
  border-color: var(--line);
  color: var(--faint);
}
.habits button[aria-pressed="true"] {
  border-color: var(--accent);
  color: var(--accent);
}

.soil-field {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.55;
}

.molt-shed {
  position: fixed;
  inset: 0;
  z-index: 35;
  display: grid;
  place-items: center;
  background: var(--bg);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--motion-dur-slow) var(--motion-ease-out);
}
.molt-shed[hidden] { display: none; }
.molt-shed[data-open="true"] { opacity: 1; }
.molt-shed .husk {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 5vw, 3rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0;
}

.duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
@media (max-width: 800px) { .duo { grid-template-columns: 1fr; } }
.duo .cipher { margin-top: 8px; min-height: 140px; letter-spacing: 0; white-space: pre-wrap; }
.freq {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 64px;
  margin-top: 14px;
}
.freq i {
  flex: 1;
  display: block;
  min-height: 2px;
  background: var(--accent);
  opacity: 0.8;
  border-radius: 1px 1px 0 0;
}
.freq-legend {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--faint);
  letter-spacing: 0;
  margin-top: 4px;
}

.why {
  border: 1px solid var(--line);
  padding: 2px 14px 8px;
  margin: 0 0 18px;
  background: color-mix(in srgb, var(--paper) 70%, transparent);
}
.why summary {
  cursor: pointer;
  list-style: none;
  min-height: 44px;
  display: flex;
  align-items: center;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: var(--accent);
}
.why summary::-webkit-details-marker { display: none; }
.why p { color: var(--mute); font-size: 0.95rem; }

.proof {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  letter-spacing: 0;
  border-left: 1px solid var(--line);
  padding: 4px 0 4px 16px;
  margin: 16px 0;
}
.proof .step {
  opacity: 0.38;
  margin: 6px 0;
  color: var(--mute);
}
.proof .step.on {
  opacity: 1;
  color: var(--ink);
}
.proof .step.ok { color: var(--ok); }

.drop {
  border: 1px dashed var(--line);
  padding: 16px;
  margin-top: 12px;
  color: var(--mute);
  min-height: 44px;
}
.drop.is-over { border-color: var(--accent); color: var(--ink); }

.hist {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0;
}
.hist li {
  border-top: 1px solid var(--line);
  padding: 8px 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.kb-hint {
  color: var(--faint);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  margin: 0 0 18px;
}
.kb-hint kbd {
  font-family: var(--font-mono);
  border: 1px solid var(--line);
  padding: 1px 5px;
  color: var(--mute);
}

.sliders {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-top: 12px;
}
.sliders label {
  display: block;
  color: var(--faint);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.sliders input[type="range"] {
  width: 100%;
  margin-top: 8px;
  accent-color: var(--accent);
}

.book-lines {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0;
  max-height: 220px;
  overflow: auto;
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 10px 12px;
  margin-top: 12px;
  color: var(--mute);
}
.book-lines .hit { color: var(--accent); background: color-mix(in srgb, var(--accent) 14%, transparent); }

@keyframes emerge-in {
  from { opacity: 0; transform: translateY(var(--motion-distance)); filter: blur(3px); }
  to { opacity: 1; transform: none; filter: none; }
}

@media (max-width: 800px) {
  .molt-rail {
    position: static;
    transform: none;
    flex-direction: row;
    justify-content: center;
    padding: 0 12px 4px;
  }
  .molt-rail::before {
    top: 50%;
    bottom: auto;
    left: 18%;
    right: 18%;
    height: 1px;
    width: auto;
  }
  .guide-line { padding-left: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  .seal,
  .molt-rail a.now::after { animation: none; }
  .manual article.just-open { animation: none; }
  .molt-shed { transition: none; }
  button, .btn { transition: none; }
}

@media (prefers-reduced-motion: no-preference) {
  @view-transition { navigation: auto; }
}

@media (prefers-reduced-transparency: reduce) {
  .brand-island,
  .why,
  .dig { background: var(--bg-2); }
}

@media (prefers-contrast: more) {
  :root {
    --ink: #f3eadc;
    --mute: #c4b9a6;
    --line: rgba(196, 163, 106, 0.55);
    --paper: #000;
  }
  body::before { opacity: 0; }
}