/* ═══════════════════════════════════════════════════════════
   LAYOUT — Navigation, ruler strip, footer
   ═══════════════════════════════════════════════════════════ */

/* ── Navigation ──────────────────────────────────────────── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  background: rgba(14, 26, 35, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px dashed var(--border);
  display: flex;
  align-items: center;
  padding: 0 var(--space-10);
}

.nav-inner {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}
.nav-logo {
  height: 32px;
  width: auto;
  display: block;
  flex-shrink: 0;
  filter: brightness(0) invert(1);
  opacity: 0.9;
  transition: opacity 0.2s;
}
.nav-brand:hover .nav-logo { opacity: 1; }

.nav-name {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--text);
  letter-spacing: 0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}
.nav-links a {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: var(--weight-medium);
  color: var(--text-secondary);
  text-decoration: none;
  letter-spacing: 0.02em;
  position: relative;
  transition: color 0.2s;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1px;
  background: var(--primary);
  transition: width 0.25s ease;
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }

/* Active nav state via aria-current */
.nav-links a[aria-current="page"] {
  color: var(--primary);
}
.nav-links a[aria-current="page"]::after {
  width: 100%;
}

/* CTA Email button */
.nav-cta {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: var(--weight-semibold);
  color: #fff !important;
  background: var(--primary);
  border: 1.5px solid var(--primary);
  padding: 7px 16px;
  border-radius: 3px;
  letter-spacing: 0.03em;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  white-space: nowrap;
  text-decoration: none;
}
.nav-cta:hover {
  background: var(--primary-hover) !important;
  border-color: var(--primary-hover);
  transform: scale(1.02);
  box-shadow: 0 4px 16px rgba(1, 158, 219, 0.3);
  color: #fff !important;
}
.nav-cta::after { display: none !important; }
.nav-cta:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

/* ── Hamburger toggle (hidden on desktop) ────────────────── */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 3px;
  cursor: pointer;
  flex-shrink: 0;
}
.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--text);
  border-radius: 1px;
  transition: transform 0.25s ease, opacity 0.2s ease;
  transform-origin: center;
}

/* Open state — morph to × */
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ── Mobile breakpoint ───────────────────────────────────── */
@media (max-width: 768px) {
  nav {
    padding: 0 var(--space-5);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    /* Off-screen by default */
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: rgba(14, 26, 35, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px dashed var(--border);
    padding: var(--space-4) var(--space-5) var(--space-6);
    transform: translateY(-110%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s ease, opacity 0.25s ease;
    z-index: 98;
  }

  .nav-links.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links li {
    width: 100%;
    border-bottom: 1px solid var(--border);
  }

  .nav-links li:last-child {
    border-bottom: none;
    padding-top: var(--space-5);
  }

  .nav-links a {
    display: block;
    padding: var(--space-4) 0;
    font-size: var(--text-base);
  }

  .nav-links a::after {
    display: none;
  }

  .nav-cta {
    display: flex;
    justify-content: center;
    width: 100%;
    padding: 14px;
    font-size: var(--text-sm);
    text-align: center;
    border-radius: 3px;
  }
}

/* ── Ruler Strip ─────────────────────────────────────────── */
.ruler {
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  height: var(--ruler-h);
  z-index: 99;
  background: rgba(23, 38, 51, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.ruler-ticks {
  display: flex;
  height: 100%;
  align-items: flex-end;
  padding-bottom: 3px;
}
.ruler-tick {
  flex-shrink: 0;
  width: 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
}
.ruler-tick span {
  display: block;
  width: 1px;
  background: var(--border);
}
.ruler-tick span.major { height: 8px; background: var(--border-bright); }
.ruler-tick span.minor { height: 4px; }
.ruler-label {
  font-family: var(--font-mono);
  font-size: 7px;
  color: var(--text-muted);
  position: absolute;
  bottom: 3px;
  pointer-events: none;
}

/* ── Footer ──────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: var(--space-16) 0 0;
  position: relative;
}
footer .dot-grid-subtle {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.5;
}
footer .container { position: relative; z-index: 1; }

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
  padding-bottom: var(--space-12);
}

.footer-name {
  font-family: var(--font-display);
  font-weight: var(--weight-extrabold);
  font-size: var(--text-2xl);
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: var(--space-2);
}
.footer-tagline {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.footer-social-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-5);
  align-items: center;
}
.footer-social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 16px;
  transition: color 0.2s, transform 0.15s;
}
.footer-social-link:hover {
  color: var(--primary);
  transform: translateY(-2px);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  align-items: flex-end;
}
.footer-link {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: var(--weight-medium);
  color: var(--text-secondary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: color 0.2s;
  letter-spacing: 0.02em;
}
.footer-link:hover { color: var(--primary); }
.footer-link-icon {
  width: 14px;
  height: 14px;
  opacity: 0.6;
}

.footer-bottom {
  border-top: 1px dashed var(--border);
  padding: 16px 0;
  display: flex;
  justify-content: center;
}
.footer-bottom span {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-links { align-items: flex-start; }
}

@media (max-width: 600px) {
  nav { padding: 0 var(--space-5); }
  .nav-links { gap: var(--space-5); }
  .nav-name { display: none; }
}