/* ============================================================
   BRAINSWITCH LABS — shared design system
   Warm near-black ground · luminous pink accent · editorial type
   ============================================================ */

:root {
  /* color — warm, desaturated near-black ground from background.png */
  --bg:        #161313;
  --bg-2:      #1d1919;
  --bg-3:      #241f1f;
  --surface:   rgba(255, 250, 249, 0.035);
  --surface-2: rgba(255, 250, 249, 0.06);
  --line:      rgba(255, 246, 245, 0.10);
  --line-soft: rgba(255, 246, 245, 0.06);

  --ink:       #f4efee;
  --ink-soft:  #c3b9b8;
  --ink-mute:  #8c8180;
  --ink-faint: #5f5755;

  /* accent — luminous pink (tweakable). default = hot rose */
  --accent:      oklch(0.71 0.19 4);
  --accent-2:    oklch(0.80 0.13 8);
  --accent-deep: oklch(0.55 0.18 2);
  --accent-glow: oklch(0.71 0.19 4 / 0.45);

  /* type (display family is tweakable via [data-font]) */
  --font-display: "Spectral", Georgia, serif;
  --font-body: "Hanken Grotesk", system-ui, sans-serif;

  --maxw: 1240px;
  --gutter: clamp(22px, 5vw, 64px);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

[data-font="modern"]   { --font-display: "Space Grotesk", system-ui, sans-serif; }
[data-font="editorial"]{ --font-display: "Newsreader", Georgia, serif; }

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* ground texture: the warm-black plate, faint vignette + grain */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -3;
  background:
    radial-gradient(120% 80% at 50% -10%, rgba(255, 90, 140, 0.10), transparent 55%),
    radial-gradient(90% 70% at 100% 100%, rgba(120, 60, 90, 0.10), transparent 60%),
    url("assets/background.png");
  background-size: cover, cover, cover;
  background-position: center;
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  opacity: 0.4;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}
html.no-grain body::after { opacity: 0; }

/* ---------- typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.04;
  letter-spacing: -0.015em;
  margin: 0;
  text-wrap: balance;
}
.display {
  font-size: clamp(2.6rem, 6.4vw, 5.6rem);
  font-weight: 400;
}
h2 { font-size: clamp(2rem, 4.2vw, 3.4rem); font-weight: 400; }
h3 { font-size: clamp(1.3rem, 2.2vw, 1.7rem); }
p  { margin: 0 0 1.1em; text-wrap: pretty; }
a  { color: inherit; text-decoration: none; }

.eyebrow {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin: 0 0 1.4rem;
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 1px;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}
.lede {
  font-size: clamp(1.15rem, 1.9vw, 1.5rem);
  line-height: 1.5;
  color: var(--ink-soft);
  font-weight: 350;
  max-width: 44ch;
}
.muted { color: var(--ink-mute); }
.serif-accent { font-family: var(--font-display); font-style: italic; }
.tnum { font-variant-numeric: tabular-nums; }

/* ---------- layout ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding-inline: var(--gutter); }
.wrap-narrow { max-width: 880px; margin: 0 auto; padding-inline: var(--gutter); }
section { position: relative; }
.section-pad { padding-block: clamp(80px, 12vw, 160px); }

.grid { display: grid; gap: clamp(28px, 4vw, 64px); }
.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 860px) {
  .cols-2, .cols-3 { grid-template-columns: 1fr; }
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.6em;
  font-family: var(--font-body);
  font-size: 0.92rem; font-weight: 600; letter-spacing: 0.01em;
  padding: 0.92em 1.5em;
  border-radius: 999px;
  white-space: nowrap;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.4s var(--ease), background 0.3s, box-shadow 0.4s, border-color 0.3s;
  will-change: transform;
}
.btn .arr { transition: transform 0.4s var(--ease); }
.btn:hover .arr { transform: translateX(4px); }
.btn-primary {
  background: linear-gradient(180deg, var(--accent-2), var(--accent));
  color: #1a0d12;
  box-shadow: 0 8px 30px -8px var(--accent-glow), inset 0 1px 0 rgba(255,255,255,0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 40px -8px var(--accent-glow), inset 0 1px 0 rgba(255,255,255,0.4); }
.btn-ghost {
  background: var(--surface);
  border-color: var(--line);
  color: var(--ink);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { background: var(--surface-2); border-color: var(--accent); color: #fff; }

/* ---------- nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background 0.4s, border-color 0.4s, backdrop-filter 0.4s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: color-mix(in oklab, var(--bg) 72%, transparent);
  backdrop-filter: blur(18px) saturate(1.2);
  border-bottom-color: var(--line-soft);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto;
  padding: 1.05rem var(--gutter);
  display: flex; align-items: center; justify-content: space-between;
}
.brand { display: inline-flex; align-items: center; gap: 0.7em; font-weight: 600; letter-spacing: 0.02em; font-size: 1.02rem; white-space: nowrap; }
.brand .dot {
  width: 11px; height: 11px; border-radius: 50%; flex: 0 0 auto;
  background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in oklab, var(--accent) 22%, transparent), 0 0 16px var(--accent-glow);
  animation: pulse 3.4s var(--ease) infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px color-mix(in oklab, var(--accent) 22%, transparent), 0 0 14px var(--accent-glow); }
  50%      { box-shadow: 0 0 0 7px color-mix(in oklab, var(--accent) 8%, transparent), 0 0 26px var(--accent-glow); }
}
.brand b { font-family: var(--font-body); font-weight: 700; }
.brand span.lab { color: var(--ink-mute); font-weight: 400; }
.nav-links { display: flex; align-items: center; gap: clamp(1rem, 2.4vw, 2.3rem); }
.nav-links a {
  font-size: 0.9rem; color: var(--ink-soft); font-weight: 500;
  position: relative; padding: 0.3em 0; transition: color 0.25s;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 1px; width: 0;
  background: var(--accent); transition: width 0.35s var(--ease);
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-links a.active { color: var(--ink); }
.nav .btn { padding: 0.62em 1.15em; font-size: 0.85rem; }
.nav-toggle { display: none; padding: 0.5em 1em; font-size: 0.82rem; }
@media (max-width: 880px) {
  .nav-links { display: none; }
  .nav-toggle { display: inline-flex; }
}
.mobile-sheet {
  position: absolute; top: 100%; left: 0; right: 0;
  background: color-mix(in oklab, var(--bg) 94%, transparent);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--line);
  padding: 0.6rem var(--gutter) 1.4rem;
  display: flex; flex-direction: column; gap: 0.2rem;
  animation: sheetIn 0.35s var(--ease);
}
@keyframes sheetIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: none; } }
.mobile-sheet a { padding: 0.85em 0; color: var(--ink-soft); border-bottom: 1px solid var(--line-soft); font-size: 1.05rem; }
.mobile-sheet a.btn { margin-top: 0.9rem; justify-content: center; border-bottom: none; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line-soft); padding-block: clamp(56px, 8vw, 96px) 40px; position: relative; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr; gap: 32px; } }
.footer-grid h4 { font-family: var(--font-body); font-size: 0.74rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ink-mute); margin-bottom: 1.1em; font-weight: 600; }
.footer-grid a { display: block; color: var(--ink-soft); padding: 0.32em 0; font-size: 0.95rem; transition: color 0.2s; }
.footer-grid a:hover { color: var(--accent-2); }
.footer-bottom { max-width: var(--maxw); margin: 56px auto 0; padding-inline: var(--gutter); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--ink-faint); font-size: 0.82rem; border-top: 1px solid var(--line-soft); padding-top: 28px; }

/* ---------- cards / surfaces ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: clamp(24px, 3vw, 38px);
  backdrop-filter: blur(8px);
  transition: transform 0.5s var(--ease), border-color 0.4s, background 0.4s;
}
.card:hover { border-color: color-mix(in oklab, var(--accent) 45%, var(--line)); }

.pill {
  display: inline-flex; align-items: center; gap: 0.5em;
  font-size: 0.78rem; font-weight: 500; letter-spacing: 0.02em;
  padding: 0.42em 0.9em; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--line); color: var(--ink-soft);
}

/* ---------- parallax / media ---------- */
.parallax-host { position: relative; overflow: clip; }
[data-parallax] { will-change: transform; }
.media-frame {
  position: relative; border-radius: 20px; overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 40px 80px -40px rgba(0,0,0,0.8);
}
.media-frame img { display: block; width: 100%; height: 100%; object-fit: cover; }
.media-frame::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(160deg, transparent 40%, rgba(20,16,16,0.4));
  pointer-events: none;
}

/* glowing orb decoration */
.orb {
  position: absolute; border-radius: 50%; filter: blur(60px); opacity: 0.5;
  background: radial-gradient(circle, var(--accent), transparent 70%);
  pointer-events: none; z-index: 0;
}

/* ---------- scroll reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}
[data-reveal].in { opacity: 1; transform: none; }
[data-reveal-delay="1"] { transition-delay: 0.08s; }
[data-reveal-delay="2"] { transition-delay: 0.16s; }
[data-reveal-delay="3"] { transition-delay: 0.24s; }
[data-reveal-delay="4"] { transition-delay: 0.32s; }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .brand .dot { animation: none; }
}

/* divider rule with glow node */
.rule { height: 1px; background: var(--line); position: relative; }
.rule::before { content: ""; position: absolute; left: 0; top: 0; width: 80px; height: 1px; background: var(--accent); box-shadow: 0 0 10px var(--accent-glow); }

/* stat */
.stat .n { font-family: var(--font-display); font-size: clamp(2.4rem, 5vw, 4rem); line-height: 1; color: var(--ink); }
.stat .n em { font-style: normal; color: var(--accent-2); }
.stat .l { color: var(--ink-mute); font-size: 0.92rem; margin-top: 0.6em; }

/* ---------- shared page hero (sub-pages) ---------- */
.page-hero { position: relative; padding-top: clamp(140px, 20vh, 220px); padding-bottom: clamp(50px, 8vw, 90px); overflow: clip; }
.page-hero-media { position: absolute; top: 0; right: 0; bottom: 0; width: 50%; z-index: 0;
  mask-image: linear-gradient(90deg, transparent, #000 55%); -webkit-mask-image: linear-gradient(90deg, transparent, #000 55%); }
.page-hero-media img { width: 100%; height: 120%; object-fit: cover; margin-top: -10%; opacity: 0.85; }
.page-hero-veil { position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: linear-gradient(90deg, var(--bg) 30%, transparent), linear-gradient(0deg, var(--bg), transparent 40%); }
.page-hero-inner { position: relative; z-index: 2; }
.page-hero-inner .display { font-size: clamp(2.3rem, 5.4vw, 4.6rem); margin-top: 0.2em; max-width: 16ch; }
.page-hero-inner .lede { margin-top: 1.5rem; }

/* ---------- shared cinematic band ---------- */
.band { position: relative; min-height: 62vh; display: flex; align-items: center; overflow: clip; }
.band-media { position: absolute; inset: -12% 0; z-index: 0; }
.band-media img { width: 100%; height: 100%; object-fit: cover; }
.band-veil { position: absolute; inset: 0; z-index: 1; background: linear-gradient(90deg, var(--bg), color-mix(in oklab, var(--bg) 45%, transparent) 55%, color-mix(in oklab, var(--bg) 70%, transparent)); }
.band-inner { position: relative; z-index: 2; width: 100%; }
.band blockquote { margin: 0; max-width: 24ch; }
.band blockquote p { font-family: var(--font-display); font-size: clamp(1.8rem, 3vw, 2.9rem); line-height: 1.18; font-weight: 400; color: var(--ink); }

/* ---------- shared section head ---------- */
.sec-head { max-width: 760px; margin-bottom: clamp(40px, 6vw, 72px); }
.sec-head h2 { margin-bottom: 1.1rem; }
.sec-head.center { margin-inline: auto; text-align: center; }
.center { text-align: center; }
.textlink { display: inline-flex; align-items: center; gap: 0.5em; margin-top: 1.6rem; font-weight: 600; color: var(--accent-2); font-size: 0.98rem; }
.textlink.sm { font-size: 0.88rem; margin-top: 1.2rem; }
.textlink .arr { transition: transform 0.4s var(--ease); }
.textlink:hover .arr { transform: translateX(4px); }