/* TraceABEL Public Site v0.1.4
   Navy/dark theme · No external fonts · No tracking · Static only
   v0.1.4: English /en/ version + lang switcher */

/* ── Reset & base ─────────────────────────────────────────────────────────── */

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

:root {
  --navy-deep:    #0A1628;
  --navy-mid:     #0F2040;
  --navy-card:    #152A4A;
  --navy-border:  #1E3A5F;
  --accent:       #3A8FC4;
  --accent-soft:  #2A6A96;
  --text-primary: #E8EDF5;
  --text-sub:     #8FA8C0;
  --text-muted:   #5A7A96;
  --white:        #FFFFFF;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background-color: var(--navy-deep);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ── Layout ───────────────────────────────────────────────────────────────── */

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── Header ───────────────────────────────────────────────────────────────── */

header {
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--navy-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  height: 36px;
  width: auto;
  display: block;
}

.lang-link {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: 0.05em;
  border: 1px solid var(--navy-border);
  padding: 0.25rem 0.7rem;
  border-radius: 4px;
  transition: color 0.15s, border-color 0.15s;
}

.lang-link:hover {
  color: var(--text-sub);
  border-color: var(--accent-soft);
}

/* ── Hero — with A-mark watermark ─────────────────────────────────────────── */

.hero {
  position: relative;
  overflow: hidden;
  padding: 6rem 0 5rem;
  border-bottom: 1px solid var(--navy-border);
}

/* A-mark watermark: behind text, right side, very subtle */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("assets/traceabel-mark.svg");
  background-repeat: no-repeat;
  background-position: center right -40px;
  background-size: min(400px, 52vw);
  opacity: 0.045;
  pointer-events: none;
}

/* Ensure hero text stays above watermark */
.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  line-height: 1.3;
  color: var(--white);
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--text-sub);
  line-height: 1.8;
  max-width: 600px;
}

/* ── Sections ─────────────────────────────────────────────────────────────── */

.section {
  padding: 5rem 0;
  border-bottom: 1px solid var(--navy-border);
}

.section-alt {
  background-color: var(--navy-mid);
}

.section h2 {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
}

.lead {
  font-size: 1.05rem;
  color: var(--text-sub);
  margin-bottom: 1rem;
  max-width: 680px;
}

.section p {
  color: var(--text-sub);
  max-width: 680px;
}

/* ── Three pillars ────────────────────────────────────────────────────────── */

.pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.pillar {
  background-color: var(--navy-card);
  border: 1px solid var(--navy-border);
  border-radius: 8px;
  padding: 1.75rem 1.5rem;
}

.pillar-icon {
  font-size: 0.5rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
  letter-spacing: 0.3em;
}

.pillar h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 0.5rem;
}

.pillar p {
  font-size: 0.9rem;
  color: var(--text-sub);
  line-height: 1.6;
}

/* ── Contact section ──────────────────────────────────────────────────────── */

.section-contact {
  padding: 4rem 0;
}

.contact-email {
  font-size: 1.1rem;
  font-family: "SF Mono", "Fira Code", "Courier New", monospace;
  color: var(--accent);
  letter-spacing: 0.02em;
  margin-top: 0.5rem;
  user-select: all;
}

/* ── Footer ───────────────────────────────────────────────────────────────── */

footer {
  padding: 2rem 0;
  border-top: 1px solid var(--navy-border);
}

footer p {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

.footer-punchline {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.04em;
}

/* ── Responsive ───────────────────────────────────────────────────────────── */

@media (max-width: 600px) {
  .hero {
    padding: 4rem 0 3.5rem;
  }

  .hero::before {
    background-position: center right -60px;
    opacity: 0.03;
  }

  .section {
    padding: 3.5rem 0;
  }

  .pillars {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 0 1.25rem;
  }

  .site-logo {
    height: 30px;
  }
}