/* Aporia house style, re-implemented (not copied) from the tokens used on
   crowintelligence.org/aporia. Self-contained; no build step. */

:root {
  --bg: #1a1a1f;
  --surface: #24242b;
  --border: #3a3a44;
  --text: #e8e6e1;
  --text-dim: #9a988f;
  --accent: #e8c97e;
  --accent-hover: #d4b56a;

  --font-serif: "IM Fell English", Georgia, serif;
  --font-mono: "Courier Prime", ui-monospace, "Courier New", monospace;

  --maxw: 900px;
  --pad: 80px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover { color: var(--accent-hover); }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: var(--pad) 24px;
  text-align: center;
}

.kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-dim);
  margin: 0 0 18px;
}

/* ── Brand bar: fixed at the top, overlays the full-bleed hero and stays
   stuck while the page scrolls. Links back to crowintelligence.org. ── */
.brand-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 48px;
  background: rgba(26, 26, 31, 0.85);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  z-index: 200;
}
.brand-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  opacity: 0.85;
  transition: opacity 0.2s ease;
}
.brand-link:hover { opacity: 1; }
.brand-logo {
  height: 28px;
  width: auto;
  display: block;
}

/* ── Site nav inside the brand bar (matches the Aporia hub) ── */
.brand-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
}
.brand-nav a {
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  text-decoration: none;
  margin-left: 22px;
  transition: color 0.2s ease;
}
.brand-nav a:hover { color: var(--accent); }

.nav-toggle {
  display: none;
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-dim);
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .brand-nav {
    display: none;
    position: absolute;
    top: 48px;
    left: 0;
    right: 0;
    background: rgba(26, 26, 31, 0.97);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 24px;
    gap: 16px;
  }
  .brand-nav.open { display: flex; }
  .brand-nav a { margin-left: 0; }
}

.i { font-style: italic; }

.section-rule {
  border: none;
  border-top: 1px solid var(--border);
  opacity: 0.35;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
}

/* Fixed full-page backdrop: the flat 2D spiral, scrolled over by the
   content. A heavy dark veil keeps body text legible; z-index:-1 sits it
   behind all normal-flow content (the hero's own montage covers it while
   the hero is on screen). */
.site-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(rgba(20, 20, 25, 0.86), rgba(20, 20, 25, 0.86)),
    #000 url("../imgs/handwriting_2d.png") center / cover no-repeat;
}

/* ───────────────────────────── HERO ──────────────────────────────── */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background: #000 url("../imgs/haus_montage.png") center / cover no-repeat;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  /* Symmetric veil — centred text sits in a balanced field (the old
     left-dark / right-light gradient made it read left-shifted). */
  background:
    radial-gradient(ellipse at center,
                     rgba(18, 18, 22, 0.58) 0%,
                     rgba(14, 14, 17, 0.86) 100%);
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
  width: 100%;
  text-align: center;
}

.hero__title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.6rem, 7vw, 5.4rem);
  line-height: 1.08;
  margin: 0.2em auto 0.5em;
  max-width: 16ch;
  text-align: center;
  text-wrap: balance;
}

.hero__lede {
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  color: var(--text);
  max-width: 42ch;
  margin: 0 auto 2em;
}

.hero__scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--text-dim);
}
.hero__scroll-cue .chev {
  width: 9px;
  height: 9px;
  border-right: 1px solid var(--text-dim);
  border-bottom: 1px solid var(--text-dim);
  transform: rotate(45deg);
  animation: cue 1.8s ease-in-out infinite;
}
@keyframes cue {
  0%, 100% { transform: rotate(45deg) translate(0, 0); opacity: 0.4; }
  50%      { transform: rotate(45deg) translate(3px, 3px); opacity: 1; }
}

/* ─────────────────────────── THE TOUR ────────────────────────────── */

.section-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.9rem, 3.4vw, 2.8rem);
  line-height: 1.15;
  margin: 0 0 0.5em;
}

.section-lede {
  color: var(--text-dim);
  max-width: 54ch;
  margin: 0 auto 2.4em;
}

/* Methodology paragraphs in the colophon — readable, slightly wider. */
.method {
  color: var(--text-dim);
  max-width: 64ch;
  margin: 0 auto 1.3em;
}
.method b { color: var(--text); font-weight: 400; }
.method i { color: var(--accent); font-style: normal; }

.media {
  margin: 0;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  background: #000;
}
.media iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

/* Near-square plate for the punctuation-spiral figure. */
.figure-plate {
  margin: 0 auto;
  max-width: 720px;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  background: var(--bg);
}
.figure-plate img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* Landscape plate for the colophon villa photo. The aspect-ratio lives on
   the <img> so the <figcaption> can flow below it without being clipped. */
.figure-wide {
  margin: 0 auto 2.4em;
  max-width: var(--maxw);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  background: var(--bg);
}
.figure-wide img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.figure-wide figcaption {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.95em;
  line-height: 1.55;
  color: var(--text-dim);
  padding: 1.1em 1.4em 1.25em;
  border-top: 1px solid var(--border);
  text-align: left;
}

/* Sources list — mono, dim, centred. */
.sources {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
  list-style: none;
  padding: 0;
  margin: 0 auto;
  max-width: 60ch;
}
.sources li {
  margin: 0 0 0.5em;
}
.sources b { color: var(--text); font-weight: 700; }

.cta-row { margin: 2.4em 0 0; }

.cta-button {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  background: transparent;
  border: 1px solid var(--accent);
  border-radius: 4px;
  padding: 14px 26px;
  transition: background 0.2s ease, color 0.2s ease;
}
.cta-button:hover,
.cta-button:focus-visible {
  background: var(--accent);
  color: var(--bg);
  outline: none;
}

/* ─────────────────────── scroll reveal ───────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.is-visible,
.reveal.is-active {
  opacity: 1;
  transform: none;
}

/* ────────────────────────── footer ───────────────────────────────── */

.site-footer {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
  padding: 48px 24px 56px;
}
.site-footer .sep { margin: 0 10px; opacity: 0.5; }

/* ───────────────────────── responsive ────────────────────────────── */

@media (max-width: 640px) {
  :root { --pad: 44px; }
  body { font-size: 16px; }
  .hero__content { padding: 0 22px; }
  .hero__title { font-size: clamp(2.1rem, 9vw, 3rem); }
  .brand-bar { height: 38px; padding: 0 16px; }
  .brand-logo { height: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero__scroll-cue .chev { animation: none; }
}