/* Inferno — foglio di stile della discesa.
   Le sezioni sono ordinate: reset, font, token, layout, componenti,
   responsive, reduced-motion. */

*, *::before, *::after { box-sizing: border-box; }

/* Niente overflow su #descent: è antenato delle copertine e delle gallery
   pinnate, e ScrollTrigger va in conflitto con un pin dentro un contenitore
   overflow clip/hidden/auto. Lo scroll orizzontale si evita clippando i singoli
   contenitori che traboccano (nastri, braci, atmosfere), non la pagina. */

/* ── Font ───────────────────────────────────────────────────────────── */
@font-face { font-family: 'Manufacturing Consent'; font-style: normal; font-weight: 400; font-display: swap; src: url('fonts/manufacturing-consent-400.woff2') format('woff2'); }
@font-face { font-family: 'Cinzel'; font-style: normal; font-weight: 400; font-display: swap; src: url('fonts/cinzel-400.woff2') format('woff2'); }
@font-face { font-family: 'Cinzel'; font-style: normal; font-weight: 600; font-display: swap; src: url('fonts/cinzel-600.woff2') format('woff2'); }
@font-face { font-family: 'Cinzel'; font-style: normal; font-weight: 700; font-display: swap; src: url('fonts/cinzel-700.woff2') format('woff2'); }
@font-face { font-family: 'Cormorant Garamond'; font-style: normal; font-weight: 300; font-display: swap; src: url('fonts/cormorant-300.woff2') format('woff2'); }
@font-face { font-family: 'Cormorant Garamond'; font-style: normal; font-weight: 400; font-display: swap; src: url('fonts/cormorant-400.woff2') format('woff2'); }
@font-face { font-family: 'Cormorant Garamond'; font-style: italic; font-weight: 400; font-display: swap; src: url('fonts/cormorant-400i.woff2') format('woff2'); }

/* ── Token attivi ───────────────────────────────────────────────────────
   Questi sono i valori che GSAP interpola durante il passaggio fra mondi.
   Partono dal mondo 1. */
:root {
  --bg: #120e0a;
  --surface: #1e1811;
  --surface-2: #2a2118;
  --accent: #b8860b;
  --accent-2: #8a6a3a;
  --text: #d9cfc0;
  --text-dim: #8f8474;
  --rule: #3a3128;
  --particle: #b8860b;

  --font-display: 'Manufacturing Consent', cursive;
  --font-ui: 'Cinzel', serif;
  --font-prose: 'Cormorant Garamond', serif;

  --measure: 62ch;
  --gutter: clamp(20px, 5vw, 64px);
  --shell: 1180px;
}

/* ── Sorgenti dei quattro mondi ─────────────────────────────────────────
   Tabella di lookup: il JS legge questi valori da config.js, e questi
   selettori fanno da fallback a step se CSS.registerProperty non c'è. */
[data-world="1"] {
  --bg: #120e0a;
  --surface: #1e1811;
  --surface-2: #2a2118;
  --accent: #b8860b;
  --accent-2: #8a6a3a;
  --text: #d9cfc0;
  --text-dim: #8f8474;
  --rule: #3a3128;
  --particle: #b8860b;
}
[data-world="2"] {
  --bg: #0e0303;
  --surface: #1c0707;
  --surface-2: #2a0808;
  --accent: #ff3b1f;
  --accent-2: #8b0000;
  --text: #e8d5cc;
  --text-dim: #9b7a70;
  --rule: #3d1512;
  --particle: #ff6a3c;
}
[data-world="3"] {
  --bg: #0d0c12;
  --surface: #17161f;
  --surface-2: #22202d;
  --accent: #c9b83a;
  --accent-2: #7a4fa0;
  --text: #ded8c8;
  --text-dim: #8d8779;
  --rule: #33303f;
  --particle: #c9b83a;
}
[data-world="4"] {
  --bg: #05080f;
  --surface: #0c131c;
  --surface-2: #131d29;
  --accent: #9fc7e8;
  --accent-2: #5b7f9e;
  --text: #e6f0f8;
  --text-dim: #8296a6;
  --rule: #22303d;
  --particle: #cfe4f5;
}

/* ── Tipografia ─────────────────────────────────────────────────────── */
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-prose);
  font-weight: 300;
  font-size: clamp(19px, 2.1vw, 23px);
  line-height: 1.9;
  transition: background-color .4s linear;
}

h1, h2 { font-family: var(--font-display); font-weight: 400; }
h3, h4 { font-family: var(--font-ui); font-weight: 600; }

.label {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: .35em;
  text-transform: uppercase;
  color: var(--accent);
}

.prose { max-width: var(--measure); }

blockquote.verse {
  margin: 0;
  padding-left: 22px;
  border-left: 1px solid var(--accent);
  font-style: italic;
  color: var(--text-dim);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
}
.skip-link:focus {
  left: 8px;
  top: 8px;
  z-index: 100;
  padding: 10px 16px;
  background: #000;
  color: #fff;
}

#particles {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* Velo di desaturazione: sopra il contenuto (z-index 2) ma sotto la chrome
   fissa (HUD 30, nav 40), così il colore drena solo dalla discesa e non dai
   comandi. backdrop-filter desatura ciò che sta dietro senza toccare il layout
   né creare containing block per i pin. Opacità animata da atmosphere.js. */
#descent-veil {
  position: fixed;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  opacity: 0;
  backdrop-filter: saturate(.5) brightness(.9);
  -webkit-backdrop-filter: saturate(.5) brightness(.9);
}

/* ── Nav fissa ──────────────────────────────────────────────────────── */
#topnav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 14px var(--gutter);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}

.topnav__home {
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--text-dim);
  text-decoration: none;
  white-space: nowrap;
}

.topnav__nav { display: flex; gap: 22px; margin-left: auto; }

.topnav__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--text-dim);
  text-decoration: none;
  transition: color .25s;
}
.topnav__link:hover,
.topnav__link[aria-current="true"] { color: var(--accent); }
.topnav__num { font-weight: 700; }

/* Hamburger: nascosto al desktop, unico comando di navigazione sotto i 768px.
   Sta sopra al pannello a tutto schermo (che è un fratello dentro l'header),
   così resta premibile per chiudere. */
.topnav__burger {
  display: none;
  position: relative;
  z-index: 2;
  margin-left: auto;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: none;
  border: 0;
  color: var(--text);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.topnav__burger-box { position: relative; display: block; width: 24px; height: 14px; }
.topnav__burger-bar {
  position: absolute;
  left: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transition: transform .3s ease, opacity .2s ease;
}
.topnav__burger-bar:nth-child(1) { top: 0; }
.topnav__burger-bar:nth-child(2) { top: 50%; }
.topnav__burger-bar:nth-child(3) { top: 100%; }

#topnav.is-open .topnav__burger { color: var(--accent); }
#topnav.is-open .topnav__burger-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
#topnav.is-open .topnav__burger-bar:nth-child(2) { opacity: 0; }
#topnav.is-open .topnav__burger-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

#progress-track {
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: var(--rule);
}
#progress-bar {
  height: 100%;
  width: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* ── HUD ────────────────────────────────────────────────────────────── */
#hud {
  position: fixed;
  top: 50%;
  left: var(--gutter);
  z-index: 30;
  width: 140px;
  transform: translateY(-50%);
  pointer-events: none;
}

.hud__row { margin: 0 0 14px; line-height: 1.3; }
.hud__key {
  display: block;
  font-family: var(--font-ui);
  font-size: 10px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.hud__val {
  display: block;
  font-family: var(--font-ui);
  font-size: 15px;
  letter-spacing: .12em;
  color: var(--text);
}
.hud__val--big { font-size: 26px; color: var(--accent); line-height: 1.1; }
.hud__val--sub { font-size: 12px; color: var(--text-dim); line-height: 1.3; }

.hud__depth { position: relative; height: 180px; margin-top: 24px; }
.hud__depth-line {
  position: absolute;
  left: 3px; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--rule), var(--accent));
}
.hud__depth-marker {
  position: absolute;
  left: 0; top: 0;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

/* ── Titolo di pagina e footer ──────────────────────────────────────── */
.page-title {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 34vh var(--gutter) 22vh;
  font-size: clamp(44px, 8vw, 104px);
  line-height: 1.05;
  text-align: center;
}
.page-title__over {
  display: block;
  margin-bottom: 18px;
  font-family: var(--font-ui);
  font-size: 13px;
  letter-spacing: .5em;
  text-transform: uppercase;
  color: var(--accent);
}

.page-foot {
  position: relative;
  z-index: 2;
  padding: 90px var(--gutter) 60px;
  text-align: center;
  border-top: 1px solid var(--rule);
}
.page-foot__quote { margin: 0 0 28px; font-style: italic; color: var(--text-dim); }
.page-foot__nav { display: flex; justify-content: center; gap: 26px; flex-wrap: wrap; }
.page-foot__nav a {
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: .25em;
  text-transform: uppercase;
  color: var(--text-dim);
  text-decoration: none;
}
.page-foot__nav a:hover { color: var(--accent); }
.page-foot__copy {
  margin-top: 30px;
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: .25em;
  color: var(--text-dim);
}

/* ── Focus visibile ─────────────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ── Macro-sezione ──────────────────────────────────────────────────── */
.macro {
  position: relative;
  z-index: 2;
  padding-bottom: clamp(80px, 14vh, 180px);
}

/* ── Copertina ──────────────────────────────────────────────────────── */
.cover {
  position: relative;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 24vh var(--gutter) 18vh;
  text-align: center;
}
.cover__numeral {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-display);
  font-size: clamp(180px, 34vw, 420px);
  line-height: 1;
  color: var(--accent);
  opacity: .12;
  pointer-events: none;
  user-select: none;
}
.cover__title {
  position: relative;
  margin: 0;
  font-size: clamp(48px, 9vw, 120px);
  line-height: 1.02;
}
.cover__range {
  position: relative;
  margin: 18px 0 0;
  font-family: var(--font-ui);
  font-size: 13px;
  letter-spacing: .4em;
  text-transform: uppercase;
  color: var(--accent);
}
.cover__rule {
  position: relative;
  width: min(420px, 70vw);
  height: 1px;
  margin: 34px auto;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

/* Fregio SVG che sostituisce il filetto quando DrawSVG è attivo. */
.cover__flourish-holder {
  position: relative;
  width: min(420px, 70vw);
  margin: 30px auto;
  color: var(--accent);
}
.cover__flourish { display: block; width: 100%; height: auto; overflow: visible; }
.cover__flourish-gem { fill: color-mix(in srgb, var(--accent) 22%, transparent); }
.cover__gloss {
  position: relative;
  margin: 0 auto;
  font-style: italic;
  color: var(--text-dim);
}

/* ── Nastro dei cerchi ──────────────────────────────────────────────────
   Gallery orizzontale pinnata (pattern canonico GSAP: vedi initRails).
   Base / senza JS: il nastro è scorribile lateralmente (overflow-x auto),
   così tutte le schede restano raggiungibili senza pin.
   .is-pinned: la aggiunge il JS solo alle mappe che verranno effettivamente
   pinnate — height esatta di 100vh e overflow hidden per il pin pulito. */
.circle-map {
  padding-block: clamp(50px, 9vh, 110px);
  overflow-x: auto;
  scrollbar-width: none;
}
.circle-map::-webkit-scrollbar { display: none; }

/* Con JS: la mappa è alta 100vh + corsa (spazio reale nel flusso). overflow
   deve tornare visible perché position: sticky non funziona dentro un
   antenato con overflow diverso da visible. */
.circle-map.is-pinned {
  height: calc(100vh + var(--rail-travel, 0px));
  padding-block: 0;
  overflow: visible;
}
.circle-map__sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: clamp(28px, 5vh, 56px);
  overflow: hidden;
}

.circle-map__title {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
/* Stesso box del titolo: bordo sinistro allineato. Il testo resta leggibile
   grazie al max-width interno, ma parte dallo stesso punto del titolo. */
.circle-map__lead {
  max-width: var(--shell);
  margin: 14px auto 0;
  padding: 0 var(--gutter);
  color: var(--text-dim);
  font-style: italic;
  text-wrap: pretty;
}
.circle-map__grid {
  display: flex;
  flex-wrap: nowrap;
  gap: clamp(16px, 2vw, 28px);
  width: max-content;
  /* Sinistra: scavalca l'HUD fisso così la prima card non ci finisce sotto.
     Destra: margine ampio perché l'ultima card entri bene prima dello sblocco. */
  padding: 8px clamp(120px, 12vw, 200px) 8px clamp(180px, 15vw, 250px);
  will-change: transform;
}

.circle-card {
  flex: 0 0 clamp(270px, 27vw, 340px);
  align-self: stretch;
  display: flex;
  flex-direction: column;
  padding: 34px 30px 28px;
  background: color-mix(in srgb, var(--surface) 45%, transparent);
  border: none;
  border-top: 1px solid color-mix(in srgb, var(--accent) 55%, transparent);
  transition: background-color .35s, transform .35s;
}
@media (hover: hover) and (pointer: fine) {
  .circle-card:hover {
    transform: translateY(-6px);
    background: color-mix(in srgb, var(--surface) 75%, transparent);
  }
}
.circle-card__num {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .42em;
  text-transform: uppercase;
  color: var(--accent);
}
.circle-card__name {
  margin: 14px 0 22px;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(24px, 2.2vw, 32px);
  line-height: 1.08;
  letter-spacing: .01em;
  color: var(--text);
}
.circle-card__body { margin: 0; font-size: 15.5px; line-height: 1.6; }
.circle-card__body dt {
  font-family: var(--font-ui);
  font-size: 9px;
  letter-spacing: .32em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-top: 16px;
}
.circle-card__body dd { margin: 5px 0 0; color: var(--text-dim); }
.circle-card__cat {
  margin-top: auto;
  padding-top: 18px;
  font-family: var(--font-ui);
  font-size: 9px;
  letter-spacing: .32em;
  text-transform: uppercase;
  color: var(--text-dim);
  opacity: .7;
}

/* ── Traccia ────────────────────────────────────────────────────────── */
.track {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(60px, 10vh, 130px) var(--gutter);
}
.track__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(40px, 7vh, 80px);
  padding-bottom: 26px;
  border-bottom: 1px solid var(--rule);
}
.track__num { margin: 0; }
.track__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(32px, 5vw, 58px);
  line-height: 1.1;
  color: var(--text);
}
.track__cantos {
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.track__play {
  justify-self: start;
  margin-top: 8px;
  padding: 13px 30px;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--accent);
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  border: 1px solid var(--accent-2);
  cursor: pointer;
  transition: background-color .25s, color .25s, box-shadow .25s;
}
.track__play:disabled { opacity: .55; cursor: not-allowed; }
.track__play:not(:disabled):hover {
  background: var(--accent-2);
  color: var(--text);
  box-shadow: 0 0 26px color-mix(in srgb, var(--accent) 40%, transparent);
}
.panel { margin-block: clamp(64px, 10vh, 120px); }
.panel:first-child { margin-top: 0; }
.panel p { margin: 0; }

/* ── Coda ───────────────────────────────────────────────────────────── */
#coda {
  position: relative;
  z-index: 2;
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(90px, 16vh, 200px) var(--gutter);
  text-align: center;
}
.coda__verse { display: inline-block; text-align: left; margin-bottom: 40px; }
.coda__verse p { margin: 0; font-size: clamp(22px, 3vw, 30px); color: var(--text); }
.coda__verse cite {
  display: block;
  margin-top: 12px;
  font-family: var(--font-ui);
  font-style: normal;
  font-size: 11px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.coda__title { margin: 0 0 40px; font-size: clamp(34px, 6vw, 68px); }
.coda__actions { display: flex; justify-content: center; gap: 18px; flex-wrap: wrap; }
.coda__btn {
  padding: 14px 32px;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--text-dim);
  text-decoration: none;
  border: 1px solid var(--rule);
  transition: color .25s, border-color .25s;
}
.coda__btn:hover { color: var(--accent); border-color: var(--accent); }
.coda__btn--primary { color: var(--accent); border-color: var(--accent-2); }

/* ── Overlay del player ─────────────────────────────────────────────── */
#player-overlay {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: grid;
  place-items: center;
  padding: var(--gutter);
}
#player-overlay[hidden] { display: none; }

.player__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, .82);
  backdrop-filter: blur(6px);
}
.player__panel {
  position: relative;
  width: min(620px, 100%);
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--accent-2);
  box-shadow: 0 0 60px rgba(0, 0, 0, .8);
}
.player__close {
  position: absolute;
  top: 10px; right: 14px;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
}
.player__close:hover { color: var(--accent); }
.player__eyebrow { margin: 0 0 8px; }
.player__title { margin: 0 0 22px; font-size: clamp(26px, 4vw, 40px); }
.player__frame iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
}

/* Stato di partenza delle animazioni. Applicato solo quando il JS ha
   dichiarato di essere attivo, così senza JS non si nasconde nulla. */
.js-motion .panel,
.js-motion .circle-card {
  opacity: 0;
}
.js-motion .cover__title,
.js-motion .cover__range,
.js-motion .cover__gloss {
  opacity: 0;
}
/* Il filetto parte collassato solo quando l'animazione è attiva: senza JS
   (o con reduced-motion) resta a piena larghezza, mai invisibile. */
.js-motion .cover__rule {
  transform: scaleX(0);
}

/* ── Atmosfere ──────────────────────────────────────────────────────── */
.atmos {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

/* Braci alla deriva (MotionPath): dietro al testo, clippate dalla sezione. */
.ember-drift {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}
.ember-drift__dot {
  position: absolute;
  bottom: 6%;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--particle);
  box-shadow: 0 0 8px var(--particle);
  opacity: .5;
}

/* I — vento diagonale sulla selva e sulla bufera */
.atmos--wind {
  background-image: repeating-linear-gradient(
    115deg,
    transparent 0 60px,
    color-mix(in srgb, var(--accent) 6%, transparent) 60px 62px
  );
  background-size: 240px 240px;
  opacity: .5;
}

/* II — bagliore di fornace dal bordo inferiore */
.atmos--furnace {
  background-image: radial-gradient(
    ellipse 90% 40% at 50% 108%,
    color-mix(in srgb, var(--accent) 40%, transparent) 0%,
    transparent 70%
  );
}

/* III — pietra acida: il fondale dell'imbuto. Lo stringimento vero e proprio
   avviene sulla griglia delle bolge, animato da atmosphere.js. */
.atmos--funnel {
  background-image:
    radial-gradient(ellipse 70% 50% at 50% 0%, color-mix(in srgb, var(--accent-2) 22%, transparent) 0%, transparent 65%),
    radial-gradient(ellipse 50% 40% at 50% 100%, color-mix(in srgb, var(--accent) 12%, transparent) 0%, transparent 70%);
  opacity: .7;
}

/* IV — gelo che si cristallizza */
.atmos--frost {
  background-image:
    radial-gradient(circle at 20% 30%, color-mix(in srgb, var(--particle) 14%, transparent) 0 2px, transparent 3px),
    radial-gradient(circle at 68% 12%, color-mix(in srgb, var(--particle) 12%, transparent) 0 3px, transparent 4px),
    radial-gradient(circle at 84% 62%, color-mix(in srgb, var(--particle) 10%, transparent) 0 2px, transparent 3px);
  background-size: 320px 320px;
  opacity: 0;
}

/* ── Responsive ─────────────────────────────────────────────────────────
   Sotto i 768px l'HUD laterale non ha spazio: si toglie del tutto (hud.js
   smette anche di aggiornarlo) e la navigazione passa all'hamburger, che
   apre un pannello a tutto schermo. */
@media (max-width: 767px) {
  #hud { display: none; }

  /* Niente backdrop-filter qui: un filtro rende l'header il blocco contenitore
     dei suoi discendenti position:fixed, e il pannello del menu (inset: 0)
     verrebbe ritagliato sulla barra invece di coprire lo schermo. Sfondo pieno
     al suo posto. */
  #topnav {
    gap: 12px;
    padding: 12px var(--gutter);
    background: var(--bg);
    backdrop-filter: none;
  }
  .topnav__home { position: relative; z-index: 2; }
  .topnav__burger { display: inline-flex; }

  .topnav__nav {
    position: fixed;
    inset: 0;
    z-index: 1;
    flex-direction: column;
    justify-content: center;
    gap: 0;
    margin: 0;
    padding: 0 var(--gutter);
    background: color-mix(in srgb, var(--bg) 96%, transparent);
    backdrop-filter: blur(14px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity .3s ease, transform .3s ease, visibility .3s;
  }
  #topnav.is-open .topnav__nav {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .topnav__link {
    gap: 16px;
    padding: 20px 0;
    font-size: 16px;
    letter-spacing: .22em;
    color: var(--text);
    border-bottom: 1px solid var(--rule);
  }
  .topnav__link:last-child { border-bottom: 0; }
  .topnav__num {
    min-width: 2.4ch;
    font-size: 12px;
    color: var(--accent);
  }
  .topnav__link[aria-current="true"] .topnav__name { color: var(--accent); }
}