/* ===========================================
   COMPONENT: Navbar
   =========================================== */

.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: all var(--transition-base);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
}
.navbar.scrolled {
  background: var(--color-white);
  box-shadow: var(--shadow-md);
  padding: 0.625rem 0;
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.nav-logo {
  flex-shrink: 0;
}
.nav-logo img {
  height: 64px;
  width: auto;
  display: block;
  object-fit: contain;
  transition: filter var(--transition-base);
}
.navbar.scrolled .nav-logo img { height: 52px; }
/* No filter — logo renders naturally over rgba navbar background */

/* Nav Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-links > li > a {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 0.4rem 0.6rem;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-navy);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.navbar.scrolled .nav-links > li > a { color: var(--color-navy); }
.nav-links > li > a:hover { color: var(--color-teal); }

/* Chevron */
.nav-chevron {
  width: 12px; height: 12px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2.5;
  transition: transform var(--transition-fast);
}
.has-dropdown:hover .nav-chevron { transform: rotate(180deg); }

/* Dropdown */
.has-dropdown { position: relative; }
.dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 220px;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-gray-200);
  padding: var(--space-2);
  z-index: 100;
}
.has-dropdown:hover .dropdown-menu { display: block; }
.dropdown-header {
  padding: 0.5rem 0.75rem;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gray-400);
}
.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0.625rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}
.dropdown-item:hover { background: var(--color-gray-100); }
.di-icon {
  width: 32px; height: 32px;
  background: rgba(14,139,127,0.1);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-teal);
  font-size: var(--text-sm);
  flex-shrink: 0;
}
.di-title {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-navy);
}

/* CTA Button in Nav */
.nav-links > li > a.nav-cta {
  background: var(--gradient-teal);
  color: var(--color-white);
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  box-shadow: var(--shadow-teal);
}
.nav-links > li > a.nav-cta:hover { transform: translateY(-1px); color: var(--color-white); }

/* Nav Right (phone CTA) */
.nav-right {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  padding-left: var(--space-2);
  margin-left: var(--space-1);
  border-left: 1px solid var(--color-gray-200);
}
.navbar.scrolled .nav-right { border-left-color: var(--color-gray-200); }
.nav-cta-call {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-navy);
  white-space: nowrap;
  transition: color var(--transition-fast);
}
.navbar.scrolled .nav-cta-call { color: var(--color-navy); }
.nav-cta-call:hover { color: var(--color-teal); }

/* Mobile toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--color-navy);
  border-radius: 2px;
  transition: all var(--transition-fast);
}
.navbar.scrolled .nav-toggle span { background: var(--color-navy); }
/* When menu open — always white (dark overlay) */
.nav-toggle.active span { background: var(--color-white) !important; }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Bridge the 8px gap so hover isn't lost when mouse moves from trigger to menu */
.dropdown-menu::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 0;
  right: 0;
  height: 10px;
}

/* Premium compact items inside wide dropdowns */
.dropdown-wide .dropdown-item {
  padding: 0.45rem 0.6rem;
  gap: var(--space-2);
  border-radius: var(--radius-md);
}
.dropdown-wide .di-icon {
  width: 28px;
  height: 28px;
  font-size: 0.75rem;
  border-radius: 6px;
}
.dropdown-wide .di-title {
  font-size: 0.8rem;
}
.dropdown-wide .dropdown-cols {
  gap: 2px;
  padding: 2px 0;
}

/* Wide multi-column dropdown (Orthopedics) */
.dropdown-wide {
  min-width: 500px;
  width: min(620px, calc(100vw - 40px));
  left: 50%;
  right: auto;
  transform: translateX(-50%) translateY(8px);
}
.has-dropdown:hover .dropdown-wide { transform: translateX(-50%) translateY(0); }
.dropdown-cols { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4px; padding: 4px 0; }
.dropdown-col { padding: 4px; }

/* ── Tablet-only: shrink nav to fit (960-1100px) ── */
@media (min-width: 961px) and (max-width: 1100px) {
  .nav-links { gap: 4px; }
  .nav-links > li > a { padding: 0.35rem 0.4rem; font-size: 0.72rem; }
  .nav-cta-call { font-size: 0.7rem; }
  .nav-logo img { height: 48px; }
  .navbar.scrolled .nav-logo img { height: 42px; }
  .nav-right { padding-left: 8px; margin-left: 4px; }
}

/* ── Mobile menu ── */
@media (max-width: 960px) {
  .nav-toggle { display: flex; order: 100; margin-left: auto; }
  .nav-right, .navbar.scrolled .nav-right { display: none; }
  .nav-container { gap: 8px; }

  /* Full-screen dark overlay */
  .nav-links {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(160deg, #0b1f2e 0%, #0d2a2a 55%, #0F172A 100%);
    flex-direction: column;
    align-items: stretch;
    padding: 5.5rem 1.25rem 5rem;
    gap: 2px;
    overflow-y: auto;
    z-index: 999;
    /* Subtle teal glow top-left */
    box-shadow: inset 60px 0 120px rgba(14,184,166,0.07);
  }
  .nav-links.open {
    display: flex;
    animation: nav-menu-open 0.22s ease forwards;
  }
  @keyframes nav-menu-open {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
  }

  /* Hamburger icon — navy on white navbar; white when menu open (dark overlay) */
  .nav-toggle span { background: var(--color-navy); }
  .navbar.scrolled .nav-toggle span { background: var(--color-navy); }
  .nav-links.open ~ * .nav-toggle span,
  .nav-toggle.active span { background: var(--color-white); }

  /* Top-level links */
  .nav-links > li > a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: #ffffff;
    font-size: 1rem;
    font-weight: 600;
    padding: 0.85rem 0.9rem;
    border-radius: 10px;
    transition: background 0.15s, color 0.15s;
    letter-spacing: 0.01em;
  }
  .nav-links > li > a:hover { background: rgba(255,255,255,0.1); color: #fff; }

  /* Active / open dropdown trigger */
  .has-dropdown.open > a {
    color: var(--color-teal-light);
    background: rgba(20,184,166,0.1);
  }

  /* Chevron color */
  .nav-chevron { stroke: currentColor; }

  /* Divider before About / Contact */
  .nav-links > li:nth-last-child(3) { margin-top: 0.5rem; border-top: 1px solid rgba(255,255,255,0.08); padding-top: 0.5rem; }

  /* CTA button */
  .nav-links > li > a.nav-cta {
    background: linear-gradient(135deg, var(--color-teal-dark) 0%, var(--color-teal) 100%);
    color: #fff !important;
    font-weight: 700;
    text-align: center;
    justify-content: center;
    padding: 0.8rem 1rem;
    margin-top: 0.5rem;
    border-radius: 999px;
    box-shadow: 0 4px 18px rgba(20,184,166,0.35);
  }

  /* ── Dropdown container ── */
  .dropdown-menu {
    display: none;
    position: static;
    box-shadow: none;
    border: none;
    padding: 0.35rem 0 0.6rem 0;
    background: transparent;
    width: 100%;
    counter-reset: drop-item;
  }
  .has-dropdown.open .dropdown-menu { display: block; }

  /* Section label */
  .dropdown-header {
    font-size: 0.58rem;
    letter-spacing: 0.12em;
    color: var(--color-teal-light);
    padding: 0.35rem 0.6rem 0.4rem;
    text-transform: uppercase;
    font-weight: 800;
    border-bottom: 1px solid rgba(94,234,212,0.18);
    margin-bottom: 0.4rem;
    opacity: 0.75;
  }

  /* Premium numbered items */
  .dropdown-item {
    counter-increment: drop-item;
    display: flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.55rem 0.75rem 0.55rem 0.6rem;
    margin-bottom: 3px;
    border-radius: 10px;
    background: linear-gradient(90deg, rgba(20,184,166,0.09), rgba(20,184,166,0.03));
    border-left: 2.5px solid rgba(94,234,212,0.3);
    transition: background 0.15s, border-color 0.15s;
    text-decoration: none;
  }
  .dropdown-item:hover {
    background: linear-gradient(90deg, rgba(20,184,166,0.18), rgba(20,184,166,0.07));
    border-left-color: var(--color-teal-light);
  }
  .dropdown-item::before {
    content: counter(drop-item, decimal-leading-zero);
    font-size: 0.6rem;
    font-weight: 800;
    color: var(--color-teal-light);
    min-width: 18px;
    flex-shrink: 0;
    line-height: 1;
    opacity: 0.8;
  }
  .di-icon {
    width: 26px; height: 26px;
    font-size: 0.7rem;
    flex-shrink: 0;
    background: rgba(20,184,166,0.15);
    color: var(--color-teal-light);
  }
  .di-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: rgba(255,255,255,0.88);
    line-height: 1.2;
  }

  /* Wide dropdown reset — kill ALL desktop hover transforms on mobile */
  .dropdown-wide,
  .has-dropdown:hover .dropdown-wide,
  .has-dropdown.open .dropdown-wide {
    min-width: 0;
    width: 100%;
    left: auto !important;
    right: auto !important;
    transform: none !important;
  }
  /* Kill hover-show on mobile — JS .open class controls visibility */
  .has-dropdown:hover .dropdown-menu { display: none; }
  .has-dropdown.open .dropdown-menu  { display: block; }
  .dropdown-cols { grid-template-columns: 1fr; gap: 0; padding: 0; }
  .dropdown-col { padding: 0; }
}