/* SIGNAL — near-black, acid green, technical grid */

:root {
  --bg: #0a0c08;
  --bg-raise: #11140d;
  --line: #232818;
  --ink: #e8f0e0;
  --ink-dim: #9aa590;
  --acid: #b8ff2e;
  --acid-dim: #7ba81e;
  --font-display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-display);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  background-attachment: fixed;
}

.wrap { max-width: 72rem; margin: 0 auto; padding: 0 1.5rem; }

/* nav */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 3.5rem; }
.logo {
  display: flex; align-items: center; gap: 0.65rem;
  color: var(--ink); text-decoration: none;
}
.logo-symbol { height: 24px; width: auto; color: var(--acid); flex-shrink: 0; }
.logo-wordmark { height: 12px; width: auto; color: var(--ink); }
.logo:hover .logo-wordmark { color: var(--acid); }
.logo-tick {
  font-family: var(--font-mono); font-weight: 500; font-size: 1.05rem;
  color: var(--acid); animation: blink 1.2s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.nav nav { display: flex; gap: 1.75rem; align-items: center; }
.nav nav a {
  font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.08em;
  color: var(--ink-dim); text-decoration: none; text-transform: uppercase;
}
.nav nav a:hover { color: var(--ink); }
.nav-cta {
  color: var(--acid) !important;
  border: 1px solid var(--acid-dim); padding: 0.35rem 0.8rem;
}
.nav-cta:hover { background: var(--acid); color: var(--bg) !important; }

/* hero */
.hero { padding: 7rem 0 4rem; position: relative; overflow: hidden; }
.hero-mark {
  position: absolute; z-index: -1; pointer-events: none;
  width: clamp(20rem, 42vw, 38rem); height: auto;
  right: -6rem; top: 50%; transform: translateY(-50%) rotate(8deg);
  color: var(--acid); opacity: 0.07;
}
.kicker {
  font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.22em;
  color: var(--acid); margin-bottom: 1.5rem; display: flex; align-items: center; gap: 0.6rem;
}
.dot {
  width: 8px; height: 8px; background: var(--acid); border-radius: 50%;
  box-shadow: 0 0 12px var(--acid); animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 50% { opacity: 0.35; } }
.hero h1 {
  font-size: clamp(2.8rem, 7vw, 5.5rem); font-weight: 700;
  letter-spacing: -0.03em; line-height: 1.02; max-width: 14ch;
}
.tagline { max-width: 44rem; margin-top: 1.5rem; font-size: 1.15rem; color: var(--ink-dim); }
.cta-row { display: flex; gap: 1rem; margin-top: 2.5rem; flex-wrap: wrap; }

.btn {
  font-family: var(--font-mono); font-size: 0.85rem; letter-spacing: 0.06em;
  text-decoration: none; padding: 0.85rem 1.6rem; text-transform: uppercase;
  transition: all 0.15s;
}
.btn-primary { background: var(--acid); color: var(--bg); font-weight: 500; }
.btn-primary:hover { box-shadow: 0 0 24px color-mix(in srgb, var(--acid) 55%, transparent); }
.btn-ghost { border: 1px solid var(--line); color: var(--ink); }
.btn-ghost:hover { border-color: var(--acid-dim); color: var(--acid); }
.btn-big { font-size: 1rem; padding: 1.1rem 2.2rem; display: inline-block; }

/* media placeholders */
.media { width: 100%; }
.placeholder {
  aspect-ratio: 16 / 9; width: 100%;
  border: 1px solid var(--line); background: var(--bg-raise);
  background-image: repeating-linear-gradient(
    -45deg, transparent, transparent 14px, color-mix(in srgb, var(--line) 60%, transparent) 14px,
    color-mix(in srgb, var(--line) 60%, transparent) 15px);
  display: grid; place-items: center; position: relative;
}
.placeholder::before, .placeholder::after {
  content: ""; position: absolute; width: 14px; height: 14px;
  border-color: var(--acid-dim); border-style: solid;
}
.placeholder::before { top: -1px; left: -1px; border-width: 2px 0 0 2px; }
.placeholder::after { bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }
.ph-label {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.2em;
  color: var(--ink-dim); border: 1px dashed var(--line); padding: 0.5rem 1rem;
}
figcaption {
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--ink-dim);
  margin-top: 0.7rem; letter-spacing: 0.04em;
}
.showcase { padding: 1rem 0 5rem; }

/* sections */
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700; letter-spacing: -0.02em;
  margin-bottom: 1rem; display: flex; align-items: baseline; gap: 1rem;
}
.index { font-family: var(--font-mono); font-size: 0.85rem; color: var(--acid); font-weight: 400; }
.section-sub { color: var(--ink-dim); margin-bottom: 2.5rem; }

/* features */
.features { padding: 4rem 0; border-top: 1px solid var(--line); }
.feature-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1px; background: var(--line); border: 1px solid var(--line); margin-top: 2.5rem;
}
.feature { background: var(--bg); padding: 1.75rem; transition: background 0.15s; }
.feature:hover { background: var(--bg-raise); }
.feature-head { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 2.5rem; }
.feature .icon { width: 28px; height: 28px; color: var(--acid); }
.feature-num { font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-dim); }
.feature h3 { font-size: 1.05rem; font-weight: 500; margin-bottom: 0.5rem; }
.feature p { font-size: 0.9rem; color: var(--ink-dim); }

/* gallery */
.gallery { padding: 4rem 0; border-top: 1px solid var(--line); }
.gallery-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr)); gap: 2rem; }

/* alpha */
.alpha { padding: 5rem 0; border-top: 1px solid var(--line); }
.alpha-inner { max-width: 46rem; }
.alpha-body { color: var(--ink-dim); margin: 1.5rem 0 2.5rem; font-size: 1.05rem; }
.alpha-note { font-family: var(--font-mono); font-size: 0.78rem; color: var(--ink-dim); margin-top: 1.5rem; letter-spacing: 0.04em; }

/* footer */
footer { border-top: 1px solid var(--line); padding: 2rem 0; }
.footer-inner {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--ink-dim); letter-spacing: 0.04em;
}
.footer-brand { display: flex; align-items: center; gap: 0.6rem; }
.footer-links { display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap; }
.footer-links a { color: var(--ink-dim); text-decoration: none; }
.footer-links a:hover { color: var(--acid); }
.footer-symbol { height: 18px; width: auto; color: var(--ink-dim); }

@media (max-width: 40rem) {
  .hero { padding: 4rem 0 3rem; }
  .nav nav { gap: 1rem; }
}