/* ============================================================
   THRESHOLD — a field guide to lucid dreaming
   Design system. Aesthetic: midnight celestial almanac.
   Skeleton build — extend freely.
   ============================================================ */

/* ---- 1. Tokens ------------------------------------------- */
:root {
  --ink:        #0a0b16;
  --ink-2:      #10122a;
  --ink-3:      #171a38;
  --ink-4:      #1e2143;
  --moon:       #ece5d3;
  --moon-dim:   #9c9c95;
  --moon-faint: #66677a;
  --gold:       #cda86b;
  --gold-lit:   #e8c98e;
  --haze:       #8893cf;
  --haze-dim:   #5b6391;
  --line:       rgba(205,168,107,0.22);
  --line-soft:  rgba(236,229,211,0.09);
  --line-haze:  rgba(136,147,207,0.28);

  --display: "Fraunces", Georgia, serif;
  --body:    "Spectral", Georgia, serif;

  --measure: 42rem;
  --wide:    66rem;
}

/* ---- 2. Reset -------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--ink);
  color: var(--moon);
  font-family: var(--body);
  font-size: clamp(1rem, 0.95rem + 0.28vw, 1.1rem);
  line-height: 1.78;
  letter-spacing: 0.004em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--gold); text-decoration: none; }
ul, ol { list-style: none; }
::selection { background: rgba(205,168,107,0.28); color: var(--moon); }

/* ---- 3. Atmosphere --------------------------------------- */
.atmosphere {
  position: fixed; inset: 0; z-index: -3; pointer-events: none;
  background:
    radial-gradient(58rem 38rem at 50% -9rem, rgba(136,147,207,0.18), transparent 70%),
    radial-gradient(70rem 30rem at 82% 114%, rgba(205,168,107,0.06), transparent 70%),
    linear-gradient(180deg, #0a0b16 0%, #0c0d1d 55%, #090a13 100%);
}
.sky { position: fixed; inset: 0; z-index: -2; pointer-events: none; }
.star {
  position: absolute; border-radius: 50%; background: var(--moon);
  animation: twinkle var(--dur,5s) ease-in-out infinite;
  animation-delay: var(--delay,0s);
}
@keyframes twinkle { 0%,100%{opacity:.15} 50%{opacity:var(--peak,.85)} }
.grain {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  opacity: .38; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---- 4. Navigation --------------------------------------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 0.6rem 1.5rem;
  padding: 0.95rem clamp(1.1rem, 5vw, 3rem);
  background: rgba(10,11,22,0.74);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.wordmark {
  display: flex; align-items: baseline; gap: 0.5rem;
  font-family: var(--display); font-size: 1.02rem; font-weight: 600;
  letter-spacing: 0.32em; text-transform: uppercase; color: var(--moon);
}
.wordmark .glyph { color: var(--gold); letter-spacing: 0; transform: translateY(1px); }
.nav-links { display: flex; flex-wrap: wrap; gap: clamp(0.85rem, 3vw, 2rem); }
.nav-links a {
  font-size: 0.72rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--moon-dim); padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color .25s, border-color .25s;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] { color: var(--gold-lit); border-color: var(--line); }

/* ---- 5. Layout ------------------------------------------- */
.wrap  { width: 100%; max-width: var(--measure); margin: 0 auto; padding: 0 clamp(1.15rem,6vw,2rem); }
.wide  { max-width: var(--wide); }
section { padding-block: clamp(2.6rem, 7vw, 4.75rem); }
.tight { padding-block: clamp(1.4rem, 4vw, 2.4rem); }

/* ---- 6. Type --------------------------------------------- */
h1,h2,h3,h4 {
  font-family: var(--display); font-weight: 600; line-height: 1.13;
  letter-spacing: -0.012em; font-optical-sizing: auto;
}
h1 { font-size: clamp(2.4rem, 1.7rem + 3.4vw, 4rem); }
h2 { font-size: clamp(1.75rem, 1.4rem + 1.6vw, 2.5rem); }
h3 { font-size: clamp(1.2rem, 1.06rem + 0.55vw, 1.42rem); }
h4 { font-size: 1.02rem; }
p + p { margin-top: 1.05rem; }
.prose > * + * { margin-top: 1.1rem; }
.prose h2, .prose h3 { margin-top: 2.4rem; }

.eyebrow {
  font-size: 0.71rem; font-weight: 500; letter-spacing: 0.3em;
  text-transform: uppercase; color: var(--gold);
}
.lead { font-size: 1.12em; }
.lead::first-letter {
  font-family: var(--display); font-weight: 600; font-size: 3.3em;
  line-height: 0.78; float: left; margin: 0.06em 0.09em -0.04em 0; color: var(--gold);
}
.no-cap::first-letter { all: unset; }
em,.em { font-style: italic; color: var(--gold-lit); }
strong { font-weight: 500; color: var(--moon); }
.muted { color: var(--moon-dim); }
.small { font-size: 0.86rem; line-height: 1.6; }

/* ---- 7. Ornament ----------------------------------------- */
.ornament {
  display: flex; align-items: center; gap: 1rem; justify-content: center;
  color: var(--gold); margin-block: clamp(2.2rem,6vw,3.4rem);
}
.ornament::before,.ornament::after {
  content:""; height:1px; flex:1; max-width:7rem;
  background: linear-gradient(90deg,transparent,var(--line),transparent);
}
.ornament span { font-size: 0.8rem; letter-spacing: 0.3em; }

/* ---- 8. Breadcrumb --------------------------------------- */
.breadcrumb {
  display: flex; flex-wrap: wrap; gap: 0.5rem;
  font-size: 0.72rem; letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--moon-faint); margin-bottom: 1.6rem;
}
.breadcrumb a { color: var(--moon-dim); }
.breadcrumb a:hover { color: var(--gold-lit); }
.breadcrumb .sep { color: var(--line); }

/* ---- 9. Page header -------------------------------------- */
.page-header { padding-top: clamp(2.4rem,7vw,4rem); }
.page-header .eyebrow { display:block; margin-bottom: 0.8rem; }
.page-header h1 { margin-bottom: 1.2rem; }
.page-header .lead { color: var(--moon-dim); }

/* ---- 10. Hero -------------------------------------------- */
.hero { text-align: center; padding-top: clamp(3rem,8vw,5.5rem); padding-bottom: clamp(2rem,5vw,3.25rem); }
.moon-mark {
  width: clamp(60px,12vw,90px); height: auto;
  margin: 0 auto clamp(1.5rem,4vw,2.25rem);
  animation: drift 14s ease-in-out infinite;
}
@keyframes drift { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-10px)} }
.hero h1 { margin-top: 1rem; }
.hero h1 .soft { color: var(--moon-dim); font-style: italic; }
.hero .lead { max-width: 33rem; margin: 1.4rem auto 0; color: var(--moon-dim); }

/* ---- 11. Buttons ----------------------------------------- */
.actions { display:flex; flex-wrap:wrap; gap: 0.85rem 1.3rem; align-items:center; }
.hero .actions, .actions.center { justify-content:center; }
.btn {
  font-family: var(--body); font-size: 0.77rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--gold-lit);
  padding: 0.82rem 1.65rem; border: 1px solid var(--gold); border-radius: 1px;
  background: linear-gradient(180deg, rgba(205,168,107,0.10), rgba(205,168,107,0.02));
  transition: background .3s, box-shadow .3s, transform .2s;
}
.btn:hover {
  background: linear-gradient(180deg, rgba(205,168,107,0.22), rgba(205,168,107,0.06));
  box-shadow: 0 0 26px -8px rgba(205,168,107,0.5); transform: translateY(-2px);
}
.btn.ghost { border-color: var(--line); color: var(--moon-dim); background: none; }
.btn.ghost:hover { color: var(--gold-lit); border-color: var(--gold); box-shadow:none; }
.link-quiet {
  font-size: 0.77rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--moon-dim); border-bottom: 1px solid transparent;
  transition: color .25s, border-color .25s;
}
.link-quiet:hover { color: var(--gold-lit); border-color: var(--line); }

/* ---- 12. Author placeholder note ------------------------- */
.brief {
  margin: 1rem 0; padding: 0.85rem 1.1rem;
  background: rgba(136,147,207,0.06);
  border: 1px dashed var(--line-haze); border-left-width: 2px; border-radius: 1px;
  font-size: 0.9rem; font-style: italic; color: var(--moon-dim); line-height: 1.62;
}
.brief::before {
  content: "To write"; display: inline-block; margin-right: 0.6rem;
  font-style: normal; font-size: 0.62rem; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--haze);
  border: 1px solid var(--line-haze); padding: 0.1rem 0.4rem; border-radius: 1px;
  transform: translateY(-1px);
}
.placeholder { color: var(--moon-faint); }

/* ---- 13. Gold callout aside ------------------------------ */
.aside {
  margin: 1.8rem 0; padding: 1.3rem 1.45rem;
  background: linear-gradient(180deg, var(--ink-2), rgba(16,18,42,0.4));
  border: 1px solid var(--line-soft); border-left: 2px solid var(--gold); border-radius: 1px;
}
.aside .aside-label {
  display:block; font-family: var(--display); font-style: italic;
  font-size: 1rem; color: var(--gold-lit); margin-bottom: 0.35rem;
}
.aside p { font-size: 0.95rem; color: var(--moon-dim); }

/* ---- 14. Ledger list ------------------------------------- */
.ledger li { padding: 1.05rem 0; border-top: 1px solid var(--line-soft); }
.ledger li:last-child { border-bottom: 1px solid var(--line-soft); }
.ledger .term { font-family: var(--display); font-weight: 600; font-size: 1.12rem; color: var(--moon); }
.ledger p { margin-top: 0.3rem; color: var(--moon-dim); }

/* ---- 15. Step list --------------------------------------- */
.steps { margin-top: 1.7rem; }
.steps > li {
  display: grid; grid-template-columns: 3.2rem 1fr; gap: 0 1.3rem;
  padding: 1.3rem 0; border-top: 1px solid var(--line-soft);
}
.steps > li:last-child { border-bottom: 1px solid var(--line-soft); }
.steps .num {
  font-family: var(--display); font-weight: 600; font-size: 1.5rem;
  color: var(--gold); line-height: 1.1; font-variant-numeric: lining-nums;
}
.steps h3 { margin-bottom: 0.35rem; }
.steps p { color: var(--moon-dim); }

/* ---- 16. Cards & grids ----------------------------------- */
.cards { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(15.5rem,1fr)); margin-top: 1.6rem; }
.card {
  display: flex; flex-direction: column; gap: 0.5rem;
  padding: 1.35rem 1.4rem;
  background: linear-gradient(180deg, var(--ink-2), rgba(16,18,42,0.35));
  border: 1px solid var(--line-soft); border-radius: 2px;
  transition: border-color .28s, transform .2s, box-shadow .28s;
}
.card:hover {
  border-color: var(--line); transform: translateY(-3px);
  box-shadow: 0 14px 34px -20px rgba(0,0,0,0.9), 0 0 22px -14px rgba(205,168,107,0.5);
}
.card .kicker {
  font-size: 0.66rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--moon-faint);
}
.card .card-title { font-family: var(--display); font-size: 1.28rem; font-weight: 600; color: var(--moon); }
.card .card-title .full { display:block; font-size:0.8rem; font-weight:400; font-style:italic; color: var(--moon-faint); letter-spacing: 0; margin-top: 0.15rem; }
.card .card-desc { font-size: 0.92rem; color: var(--moon-dim); flex: 1; }
.card .card-meta { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin-top: 0.4rem; }
.card .go { font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--gold); margin-top: 0.3rem; }

/* ---- 17. Badges & difficulty ----------------------------- */
.badge {
  font-size: 0.62rem; letter-spacing: 0.15em; text-transform: uppercase;
  padding: 0.18rem 0.5rem; border-radius: 1px; border: 1px solid var(--line-soft);
  color: var(--moon-dim);
}
.badge.dild   { color: var(--haze);     border-color: var(--line-haze); background: rgba(136,147,207,0.08); }
.badge.wild   { color: var(--gold-lit); border-color: var(--line);      background: rgba(205,168,107,0.08); }
.badge.hybrid { color: var(--moon);     border-color: var(--line-soft); background: rgba(236,229,211,0.05); }
.diff { display: inline-flex; gap: 3px; align-items: center; }
.diff .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--ink-4); }
.diff .dot.on { background: var(--gold); }
.diff .lbl { font-size: 0.62rem; letter-spacing: 0.13em; text-transform: uppercase; color: var(--moon-faint); margin-right: 0.25rem; }

/* ---- 18. Spec strip (technique header) ------------------- */
.spec {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(8.5rem,1fr));
  gap: 1px; margin: 1.9rem 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft); border-radius: 2px; overflow: hidden;
}
.spec-item { background: var(--ink-2); padding: 0.95rem 1.1rem; }
.spec-label { font-size: 0.62rem; letter-spacing: 0.17em; text-transform: uppercase; color: var(--moon-faint); }
.spec-value { font-family: var(--display); font-size: 1.02rem; color: var(--moon); margin-top: 0.25rem; }

/* ---- 19. Hub group --------------------------------------- */
.group { margin-top: clamp(2.2rem,5vw,3.25rem); }
.group-head { display: flex; align-items: baseline; gap: 0.9rem; }
.group-head h2 { font-size: clamp(1.4rem,1.2rem+0.7vw,1.7rem); }
.group-head .count {
  font-size: 0.7rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--gold);
}
.group-head + p { margin-top: 0.5rem; color: var(--moon-dim); }

/* ---- 20. Filter bar -------------------------------------- */
.filters { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.7rem; }
.filter-btn {
  font-family: var(--body); font-size: 0.72rem; letter-spacing: 0.13em;
  text-transform: uppercase; color: var(--moon-dim); cursor: pointer;
  padding: 0.5rem 0.95rem; background: none;
  border: 1px solid var(--line-soft); border-radius: 1px;
  transition: color .2s, border-color .2s, background .2s;
}
.filter-btn:hover { color: var(--gold-lit); border-color: var(--line); }
.filter-btn[aria-pressed="true"] {
  color: var(--ink); background: var(--gold); border-color: var(--gold); font-weight: 500;
}

/* ---- 21. TOC --------------------------------------------- */
.toc {
  margin: 2rem 0; padding: 1.3rem 1.5rem;
  background: var(--ink-2); border: 1px solid var(--line-soft); border-radius: 2px;
}
.toc .toc-label { font-size: 0.68rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--gold); }
.toc ol { margin-top: 0.8rem; counter-reset: toc; }
.toc li { counter-increment: toc; padding: 0.32rem 0; border-top: 1px solid var(--line-soft); }
.toc li:first-of-type { border-top: none; }
.toc a { color: var(--moon-dim); }
.toc a::before {
  content: counter(toc,decimal-leading-zero); margin-right: 0.7rem;
  font-family: var(--display); color: var(--gold); font-size: 0.85em;
}
.toc a:hover { color: var(--gold-lit); }

/* ---- 22. FAQ accordion ----------------------------------- */
.faq { margin-top: 1.7rem; }
.faq details {
  border-top: 1px solid var(--line-soft);
}
.faq details:last-child { border-bottom: 1px solid var(--line-soft); }
.faq summary {
  list-style: none; cursor: pointer; padding: 1.1rem 2.2rem 1.1rem 0;
  position: relative; font-family: var(--display); font-weight: 600;
  font-size: 1.08rem; color: var(--moon); transition: color .2s;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 0.2rem; top: 0.95rem;
  font-family: var(--display); font-size: 1.4rem; color: var(--gold);
  transition: transform .25s;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq summary:hover { color: var(--gold-lit); }
.faq .answer { padding: 0 0 1.25rem; color: var(--moon-dim); }

/* ---- 23. Glossary ---------------------------------------- */
.gloss-nav {
  display: flex; flex-wrap: wrap; gap: 0.35rem; margin: 1.7rem 0 0.5rem;
}
.gloss-nav a {
  font-family: var(--display); font-size: 0.95rem; width: 2rem; height: 2rem;
  display: grid; place-items: center; color: var(--moon-dim);
  border: 1px solid var(--line-soft); border-radius: 1px; transition: all .2s;
}
.gloss-nav a:hover { color: var(--gold-lit); border-color: var(--line); }
.gloss-group { margin-top: 2.4rem; scroll-margin-top: 6rem; }
.gloss-letter {
  font-family: var(--display); font-size: 2.4rem; color: var(--line);
  font-weight: 600; line-height: 1; margin-bottom: 0.4rem;
}
.gloss-term {
  padding: 1rem 0; border-top: 1px solid var(--line-soft);
}
.gloss-term:last-child { border-bottom: 1px solid var(--line-soft); }
.gloss-term dt { font-family: var(--display); font-weight: 600; font-size: 1.12rem; color: var(--moon); }
.gloss-term dd { color: var(--moon-dim); font-size: 0.95rem; margin-top: 0.25rem; }

/* ---- 24. Related / prev-next ----------------------------- */
.related {
  margin-top: clamp(2.4rem,6vw,3.5rem); padding-top: 1.7rem;
  border-top: 1px solid var(--line);
}
.related .eyebrow { display: block; margin-bottom: 0.9rem; }
.related-links { display: flex; flex-wrap: wrap; gap: 0.6rem 1.6rem; }
.related-links a {
  font-size: 0.92rem; color: var(--moon-dim);
  border-bottom: 1px solid transparent; transition: color .2s, border-color .2s;
}
.related-links a:hover { color: var(--gold-lit); border-color: var(--line); }

/* ---- 25. Footer ------------------------------------------ */
.footer {
  text-align: center; margin-top: 2rem;
  padding: clamp(2.8rem,7vw,4rem) 1.5rem 3rem;
  border-top: 1px solid var(--line);
}
.footer .glyph { color: var(--gold); font-size: 1.05rem; }
.footer .fname {
  font-family: var(--display); font-weight: 600; letter-spacing: 0.26em;
  text-transform: uppercase; font-size: 0.88rem; margin-top: 0.55rem;
}
.footer p { color: var(--moon-faint); font-size: 0.82rem; margin-top: 0.5rem; }
.footer .wip {
  display: inline-block; margin-top: 0.9rem;
  font-size: 0.66rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--haze); border: 1px solid var(--line-haze);
  padding: 0.25rem 0.7rem; border-radius: 1px;
}

/* ---- 26. Reveal ------------------------------------------ */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .85s ease, transform .85s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---- 27. Prose lists (bullets, numbered) ----------------- */
.prose ul.bullets,
.steps ul.bullets {
  margin-top: 0.7rem;
  padding-left: 0;
}
.prose ul.bullets li,
.steps ul.bullets li {
  position: relative;
  padding-left: 1.4rem;
  margin-top: 0.45rem;
  color: var(--moon-dim);
  line-height: 1.7;
}
.prose ul.bullets li:first-child,
.steps ul.bullets li:first-child { margin-top: 0.15rem; }
.prose ul.bullets li::before,
.steps ul.bullets li::before {
  content: "\2022";
  position: absolute;
  left: 0.35rem;
  top: 0;
  color: var(--gold);
  font-size: 0.9em;
  line-height: 1.85;
}
.prose ol.numbered {
  margin-top: 0.9rem;
  padding-left: 0;
  counter-reset: nlist;
}
.prose ol.numbered li {
  position: relative;
  padding-left: 2rem;
  margin-top: 0.6rem;
  color: var(--moon-dim);
  counter-increment: nlist;
  line-height: 1.72;
}
.prose ol.numbered li:first-child { margin-top: 0; }
.prose ol.numbered li::before {
  content: counter(nlist, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.05em;
  font-family: var(--display);
  font-weight: 600;
  color: var(--gold);
  font-size: 0.9em;
  font-variant-numeric: lining-nums;
  letter-spacing: 0.02em;
}

/* small refinements for filled-in technique pages */
.steps h3 + p { margin-top: 0.2rem; }
.steps p + p { margin-top: 0.7rem; }

/* ---- 28. Responsive -------------------------------------- */
@media (max-width: 560px) {
  .nav { justify-content: center; }
  .wordmark { letter-spacing: 0.2em; }
  .steps > li { grid-template-columns: 2.5rem 1fr; gap: 0 0.9rem; }
  .steps .num { font-size: 1.25rem; }
  .lead::first-letter { font-size: 2.9em; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .star, .moon-mark { animation: none !important; }
  .reveal { transition: none; opacity: 1; transform: none; }
}