/*
 * Shared site header: the six-section navigation (NARR-NAV).
 * Self-contained on purpose: hand-written pages under public/ that do not
 * load style.css (post-llm-case, licensing) link this file too, so every
 * value has its own fallback and nothing depends on page tokens.
 * Phone width: the nav wraps onto rows. No horizontal scroll, no script.
 */
.aien-header {
  --an-bg: rgba(8, 9, 12, 0.92);
  --an-border: #1c2536;
  --an-text: #f1f5f9;
  --an-text-2: #94a3b8;
  --an-muted: #8ea0b5;
  --an-blue: #2d7ff9;
  --an-green: #00e599;
  --an-sans: "Space Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --an-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  box-sizing: border-box;
  border-bottom: 1px solid var(--an-border);
  background: var(--an-bg);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  padding: 14px 0;
  font-family: var(--an-sans);
  line-height: 1.4;
  color: var(--an-text);
  z-index: 50;
}

.aien-header *,
.aien-header *::before,
.aien-header *::after {
  box-sizing: border-box;
}

.aien-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
}

.aien-header .aien-brand,
.aien-header .aien-brand:hover {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--an-text);
  text-decoration: none;
}

.aien-brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--an-blue);
  background: linear-gradient(135deg, #131822 0%, #1e2638 100%);
  border: 1px solid var(--an-blue);
  box-shadow: 0 0 12px rgba(45, 127, 249, 0.15);
  flex: none;
}

.aien-brand-copy {
  display: flex;
  flex-direction: column;
}

.aien-brand-name {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
  color: var(--an-text);
}

.aien-brand-tag {
  font-family: var(--an-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--an-muted);
}

.aien-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
}

.aien-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.aien-nav-primary {
  gap: 6px 20px;
}

.aien-nav .aien-nav-secondary {
  gap: 6px 14px;
  padding-left: 20px;
  border-left: 1px solid var(--an-border);
}

.aien-nav a.aien-nav-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--an-text-2);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.aien-nav a.aien-nav-minor {
  font-family: var(--an-mono);
  font-size: 12px;
  color: var(--an-muted);
  text-decoration: none;
  padding: 4px 0;
}

.aien-nav a[href="/#waitlist"] {
  color: var(--an-green);
}

.aien-nav a.aien-nav-link:hover,
.aien-nav a.aien-nav-minor:hover {
  color: var(--an-text);
  border-bottom-color: var(--an-blue);
}

.aien-nav a.aien-nav-link:focus-visible,
.aien-nav a.aien-nav-minor:focus-visible,
.aien-brand:focus-visible {
  outline: 2px solid var(--an-green);
  outline-offset: 3px;
}

/* Wide screens: the header stays pinned while reading. A page with its own
   sticky bar opts out with data-sticky="off" on the header. */
@media (min-width: 1100px) {
  .aien-header {
    position: sticky;
    top: 0;
  }
}

/* Narrow screens: brand on its own row, sections wrap below it. */
@media (max-width: 1099px) {
  .aien-nav {
    width: 100%;
  }
}

@media (max-width: 600px) {
  .aien-header-inner {
    padding: 0 16px;
  }

  .aien-nav-primary {
    gap: 4px 16px;
  }

  .aien-nav a.aien-nav-link {
    font-size: 13.5px;
  }

  .aien-nav .aien-nav-secondary {
    width: 100%;
    padding-left: 0;
    padding-top: 8px;
    border-left: none;
    border-top: 1px solid var(--an-border);
  }
}

.aien-header[data-sticky="off"] {
  position: static;
}