/* ===== Design tokens ===== */
:root {
  --bg:        #0a0a0c;
  --bg-elev:   #141418;
  --bg-card:   #16161b;
  --text:      #f2f2f4;
  --text-dim:  #a9a9b3;
  --accent:    #e4002b;       /* CODEC Market red, matched to the wave mark */
  --accent-2:  #ff3355;
  --border:    #26262e;
  --maxw:      1120px;
  --radius:    14px;
  --space:     clamp(3rem, 8vw, 6rem);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* ===== Reset / base ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 0.5em; }
h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
h3 { font-size: 1.25rem; }
p  { margin: 0 0 1rem; }
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 1.5rem; }
.lead { font-size: 1.2rem; color: var(--text-dim); max-width: 60ch; }

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform .15s ease, background .15s ease;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-2); transform: translateY(-2px); }
.btn-lg { padding: 0.95rem 2rem; font-size: 1.05rem; }

/* ===== Header ===== */
#site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10,10,12,0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; font-weight: 700; }
.brand-name { font-size: 1.1rem; letter-spacing: -0.01em; }
.brand-mark { width: 36px; height: 36px; object-fit: contain; }
#primary-nav { display: flex; align-items: center; gap: 1.75rem; }
#primary-nav ul { display: flex; gap: 1.5rem; list-style: none; margin: 0; padding: 0; }
#primary-nav a { color: var(--text-dim); font-weight: 500; transition: color .15s ease; }
#primary-nav a:hover { color: var(--text); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: .2s; }

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 78vh;
  display: flex; align-items: center;
  text-align: center;
  background: #000 url("../assets/img/hero-bg.png") center / cover no-repeat;
  overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, rgba(10,10,12,0.25), rgba(10,10,12,0.9));
}
.hero-inner { position: relative; z-index: 1; margin-inline: auto; }
.hero h1 { font-size: clamp(2.8rem, 8vw, 5.5rem); margin-bottom: 0.2em; }
.hero-tagline { font-size: clamp(1.1rem, 2.5vw, 1.5rem); color: var(--text-dim); max-width: 30ch; margin: 0 auto 2rem; }

/* ===== Sections ===== */
.section { padding: var(--space) 0; border-top: 1px solid var(--border); }
.section-one { text-align: center; }
.section-one .lead { margin-inline: auto; }
.section-about p { max-width: 75ch; color: var(--text-dim); font-size: 1.1rem; }

/* ===== Feature grid ===== */
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
}
.feature-card h3 { color: var(--accent-2); }
.feature-card p { color: var(--text-dim); margin: 0; }
.feature-card-wide { grid-column: 1 / -1; }

/* ===== Collaborators ===== */
.section-collab { text-align: center; }
.collab-logos {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center;
  gap: clamp(2rem, 6vw, 5rem); margin-top: 2.5rem;
}
.collab-logos img {
  height: 60px; width: auto; object-fit: contain;
  filter: grayscale(1) brightness(1.6); opacity: 0.75;
  transition: filter .2s ease, opacity .2s ease;
}
.collab-logos img:hover { filter: none; opacity: 1; }

/* ===== Footer ===== */
.site-footer { border-top: 1px solid var(--border); padding: 2.5rem 0; }
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 0.75rem; text-align: center; }
.copyright { color: var(--text-dim); font-size: 0.9rem; margin: 0; }

/* ===== Responsive ===== */
@media (max-width: 760px) {
  .nav-toggle { display: flex; }
  #primary-nav {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 1rem;
    background: var(--bg-elev); border-bottom: 1px solid var(--border);
    padding: 1.25rem 1.5rem;
    transform: translateY(-120%); opacity: 0; pointer-events: none;
    transition: transform .25s ease, opacity .25s ease;
  }
  #primary-nav.nav-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  #primary-nav ul { flex-direction: column; gap: 1rem; }
  .feature-grid { grid-template-columns: 1fr; }
}