/* ============================================================
   HEADER & NAVIGATION
   ============================================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  height: 68px;
  gap: 32px;
}


/* ── Brand ── */

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}

.nav-wordmark {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--ink);
  white-space: nowrap;
}

/* ── Nav Links (desktop) ── */

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
  justify-content: center;
}

.nav-links > li > a {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  border-radius: var(--r-sm);
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
}

.nav-links > li > a:hover {
  color: var(--ink);
  background: var(--bg-elev);
}


/* ── Dropdown trigger chevron ── */

.nav-item-dropdown > a::after {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
  transition: transform 0.2s;
  flex-shrink: 0;
}

.nav-item-dropdown:hover > a::after,
.nav-item-dropdown.open > a::after {
  transform: rotate(-135deg) translateY(1px);
}


/* ── Dropdown menu ── */

.nav-item-dropdown {
  position: relative;
}

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-md);
  padding: 6px;
  min-width: 220px;
  list-style: none;
  z-index: 200;
}

.nav-item-dropdown:hover .nav-dropdown-menu,
.nav-item-dropdown.open .nav-dropdown-menu {
  display: block;
}

/* Invisible gap between trigger and menu prevents hover loss on diagonal mouse movement */
.nav-dropdown-menu::before {
  content: '';
  position: absolute;
  top: -12px;
  left: 0;
  width: 100%;
  height: 12px;
}

.nav-dropdown-menu li a {
  display: block;
  padding: 9px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted);
  border-radius: var(--r-sm);
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.nav-dropdown-menu li a:hover {
  background: var(--bg-elev);
  color: var(--ink);
}


/* ── Right cluster ── */

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}


/* ── Primary CTA button ── */

.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  background: var(--ink);
  color: #ffffff;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--r-md);
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.2s, transform 0.2s;
}

.nav-cta-btn svg {
  transition: transform 0.2s;
  flex-shrink: 0;
}

.nav-cta-btn:hover {
  background: var(--ink-soft);
  transform: translateY(-1px);
}

.nav-cta-btn:hover svg {
  transform: translateX(3px);
}


/* ── Hamburger ── */

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.2s;
}

.hamburger:hover {
  border-color: var(--line-strong);
}

.hamburger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}

.hamburger.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
}

.hamburger.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}


/* ============================================================
   MOBILE  (< 1024px)
   ============================================================ */

@media (max-width: 1024px) {

  .hamburger {
    display: flex;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    background: var(--bg);
    border-top: 1px solid var(--line);
    padding: 12px 20px 32px;
    overflow-y: auto;
    z-index: 99;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links > li > a {
    padding: 13px 4px;
    font-size: 1rem;
    border-radius: 0;
    border-bottom: 1px solid var(--line-soft);
    background: transparent;
  }

  .nav-links > li:last-child > a {
    border-bottom: none;
  }

  /* Flatten dropdowns on mobile */
  .nav-item-dropdown > a::after {
    display: none;
  }

  .nav-dropdown-menu {
    display: block;
    position: static;
    transform: none;
    box-shadow: none;
    border: none;
    border-left: 2px solid var(--line);
    border-radius: 0;
    padding: 4px 0 4px 16px;
    background: transparent;
    min-width: unset;
  }
  .nav-dropdown-menu li a {
    padding: 8px 4px;
    border-radius: 0;
    font-size: 0.9rem;
    color: var(--muted);
  }

  /* Hide CTA text on very small screens, keep button compact */
  .nav-cta-btn {
    font-size: 0.8rem;
    padding: 8px 14px;
  }
}