:root {
  --bg: #0a0a10;
  --card: #121218;
  --surface: #1e1e2e;
  --accent: #9B3DB5;
  --accent-h: #c462e0;
  --accent-dim: rgba(155,61,181,0.15);
  --text: #ede9e3;
  --text-2: rgba(237,233,227,0.6);
  --text-3: rgba(237,233,227,0.3);
  --border: rgba(80,80,126,0.4);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scrollbar-width: thin;
  scrollbar-color: var(--accent) var(--bg);
}
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: rgba(155,61,181,0.4); border-radius: 3px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'IBM Plex Sans', sans-serif;
  font-weight: 300;
  min-height: 100vh;
  padding: 5rem 3rem 8rem;
}

/* NAV */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  background: rgba(10,10,16,0.95);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  display: flex; align-items: center; justify-content: space-between;
  height: 52px;
}
.nav-logo {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.65rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--accent); white-space: nowrap; flex-shrink: 0;
}
.nav-links { display: flex; align-items: center; }
.nav-link {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.6rem; letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--text-3); text-decoration: none;
  padding: 0 0.75rem; height: 52px;
  display: flex; align-items: center;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color 0.2s, border-color 0.2s;
}
.nav-link:hover { color: var(--text-2); }
.nav-link.active { color: var(--accent-h); border-bottom-color: var(--accent); }

.nav-toggle {
  display: none; flex-direction: column; justify-content: center;
  gap: 5px; width: 32px; height: 32px;
  background: none; border: none; cursor: pointer; padding: 4px; flex-shrink: 0;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--text-3); border-radius: 2px; transition: background 0.2s;
}
.nav-toggle:hover span { background: var(--accent-h); }

.nav-drawer {
  display: none; position: fixed; top: 52px; left: 0; right: 0; z-index: 199;
  background: rgba(10,10,16,0.98);
  border-bottom: 1px solid var(--border);
  flex-direction: column; padding: 0.5rem 0 1rem;
}
.nav-drawer.open { display: flex; }
.nav-drawer .nav-link {
  height: 44px; padding: 0 2rem;
  border-bottom: none; border-left: 2px solid transparent;
}
.nav-drawer .nav-link.active {
  border-left-color: var(--accent); color: var(--accent-h);
}

@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .nav-links { display: none; }
  .nav { padding: 0 1rem; }
}

/* PROGRESS BAR */
.progress-bar {
  position: fixed; top: 0; left: 0; height: 2px; z-index: 300;
  background: linear-gradient(90deg, var(--accent), var(--accent-h));
  width: 0%; opacity: 0; transition: opacity 0.3s; pointer-events: none;
}

/* PAGE HEADER */
.page-header { text-align: center; margin-bottom: 5rem; }
.page-header .mono-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.65rem; letter-spacing: 0.25em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 1.25rem;
}
.page-header h1 {
  font-family: 'Instrument Serif', serif;
  font-size: 3rem; color: var(--text); line-height: 1.1; margin-bottom: 1rem;
}
.page-header p {
  font-size: 0.95rem; color: var(--text-2);
  max-width: 520px; margin: 0 auto; line-height: 1.6;
}
.size-badge {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.6rem; letter-spacing: 0.12em; text-transform: uppercase;
  background: var(--accent-dim); color: var(--accent-h);
  border: 1px solid rgba(155,61,181,0.3);
  border-radius: 4px; padding: 0.25rem 0.75rem; margin-top: 1rem;
}

/* SECTION */
.section { margin-bottom: 6rem; }
.section-header { display: flex; align-items: center; gap: 1.5rem; margin-bottom: 2.5rem; }
.section-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--accent); white-space: nowrap;
}
.section-rule { flex: 1; height: 1px; background: linear-gradient(90deg, rgba(155,61,181,0.5), transparent); }
.section-desc {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.65rem; color: var(--text-3); white-space: nowrap;
}

/* GRAPHIC WRAP */
.banner-wrap { display: flex; flex-direction: column; gap: 0.75rem; margin-bottom: 2.5rem; }
.slides-row { display: flex; gap: 2rem; flex-wrap: wrap; }
.slide-wrap { display: flex; flex-direction: column; gap: 0.75rem; }

/* BUTTON ROW */
.btn-row { display: flex; align-items: center; flex-wrap: wrap; gap: 0.4rem; }
.dl-btn {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.6rem; letter-spacing: 0.15em; text-transform: uppercase;
  color: rgba(155,61,181,0.8); background: transparent;
  border: 1px solid rgba(155,61,181,0.3); border-radius: 4px;
  padding: 0.35rem 1rem; cursor: pointer;
  transition: border-color 0.2s, color 0.2s; white-space: nowrap;
}
.dl-btn:hover { border-color: var(--accent-h); color: var(--accent-h); }
.share-btn {
  display: inline-flex; align-items: center; gap: 0.35rem;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.55rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: rgba(155,61,181,0.75); background: transparent;
  border: 1px solid rgba(155,61,181,0.25); border-radius: 4px;
  padding: 0.3rem 0.7rem; cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s; white-space: nowrap;
}
.share-btn:hover { border-color: rgba(155,61,181,0.7); color: #c462e0; background: rgba(155,61,181,0.08); }
.share-btn svg { flex-shrink: 0; opacity: 0.8; }

/* SHARED DECORATIONS */
.glow-blob { position: absolute; border-radius: 50%; pointer-events: none; }
.dot-grid {
  position: absolute; pointer-events: none;
  background-image: radial-gradient(circle, rgba(155,61,181,0.22) 1px, transparent 1px);
  background-size: 18px 18px;
}

/* SCROLL REVEAL */
[data-reveal] {
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.7s cubic-bezier(0.16,1,0.3,1), transform 0.7s cubic-bezier(0.16,1,0.3,1);
}
[data-reveal].revealed { opacity: 1; transform: none; }

/* SHARE TOAST */
.share-toast {
  position: fixed; bottom: 2rem; left: 50%; transform: translateX(-50%);
  background: rgba(155,61,181,0.9); color: #ede9e3;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 0.6rem 1.4rem; border-radius: 4px;
  opacity: 0; pointer-events: none; transition: opacity 0.3s; z-index: 9999;
}
.share-toast.show { opacity: 1; }

/* SCROLL TOP */
.scroll-top {
  position: fixed; bottom: 1.5rem; right: 1.5rem;
  width: 38px; height: 38px; border-radius: 50%;
  background: var(--accent); color: var(--text);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transform: translateY(10px);
  transition: opacity 0.3s, transform 0.3s;
  cursor: pointer; z-index: 50; border: none;
}
.scroll-top.visible { opacity: 1; transform: none; }
.scroll-top:hover { background: var(--accent-h); }

/* MOBILE */
@media (max-width: 720px) {
  html, body { overflow-x: hidden; }
  body { padding: 4rem 0.5rem 6rem; }
  .btn-row { width: 100%; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
}