/* ==========================================================================
   Header + Hero + Feature Strip — DentalGrowthWorks
   Premium dental digital agency / modern SaaS direction.
   Uses design tokens defined in style.css :root.
   ========================================================================== */

/* ---------------------------------------------------------------------- */
/* HEADER                                                                   */
/* ---------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 16px;
  z-index: 200;
  transition: padding var(--dur) var(--ease);
}

.site-header .nav-inner {
  background: var(--white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px -20px rgba(11, 42, 87, 0.18);
  padding: 16px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  transition: padding var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.site-header.is-scrolled .nav-inner {
  padding: 11px 26px;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-color: var(--border-light);
  box-shadow: 0 12px 28px -18px rgba(11, 42, 87, 0.22);
}

.site-header .logo { display: inline-flex; align-items: center; }
.site-header .logo-img {
  width: clamp(168px, 14vw, 204px);
  height: auto;
  display: block;
}

.site-header nav[aria-label="Primary"] { flex: 1; display: flex; justify-content: center; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links > li { position: relative; }

.nav-links > li > a,
.nav-link-toggle {
  position: relative;
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--ink-900);
  background: none;
  border: none;
  padding: 6px 1px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-body);
  transition: color var(--dur) var(--ease);
}

.nav-links > li > a::after,
.nav-link-toggle::after {
  content: "";
  position: absolute;
  left: 1px;
  right: 1px;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}

.nav-links > li > a:hover,
.nav-link-toggle:hover,
.nav-link-toggle[aria-expanded="true"] {
  color: var(--blue-600);
}

.nav-links > li > a:hover::after,
.nav-link-toggle:hover::after,
.nav-link-toggle[aria-expanded="true"]::after {
  transform: scaleX(1);
}

.nav-link-toggle .chevron { font-size: 0.7rem; transition: transform var(--dur) var(--ease); color: var(--slate-400); }
.nav-link-toggle[aria-expanded="true"] .chevron { transform: rotate(180deg); }

.nav-dropdown {
  position: absolute;
  top: calc(100% + 16px);
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  min-width: 240px;
  background: var(--white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  box-shadow: 0 24px 48px -24px rgba(11, 42, 87, 0.32);
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s;
  z-index: 50;
}

.has-dropdown:hover .nav-dropdown,
.nav-dropdown.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown a {
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-900);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-dropdown a:hover { background: var(--surface-50); color: var(--blue-600); }

.nav-cta { display: flex; align-items: center; gap: 14px; }

.btn-header-cta {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  background: var(--gradient-accent);
  color: var(--white);
  font-weight: 700;
  font-size: 0.92rem;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  box-shadow: 0 10px 22px -10px rgba(23, 136, 242, 0.55);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), filter 0.25s var(--ease);
}

.btn-header-cta-icon { display: inline-flex; }
.btn-header-cta-icon svg { width: 16px; height: 16px; }

.btn-header-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px -10px rgba(23, 136, 242, 0.6);
  filter: brightness(1.04);
}
.btn-header-cta:focus-visible { outline: 2px solid var(--blue-600); outline-offset: 3px; }

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-light);
  background: var(--white);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.menu-toggle-bars { position: relative; width: 18px; height: 12px; display: inline-block; }
.menu-toggle-bars span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--ink-900);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease), top 0.3s var(--ease);
}
.menu-toggle-bars span:nth-child(1) { top: 0; }
.menu-toggle-bars span:nth-child(2) { top: 5px; }
.menu-toggle-bars span:nth-child(3) { top: 10px; }
.menu-toggle[aria-expanded="true"] .menu-toggle-bars span:nth-child(1) { top: 5px; transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle-bars span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] .menu-toggle-bars span:nth-child(3) { top: 5px; transform: rotate(-45deg); }

/* Mobile drawer */
.nav-drawer {
  position: fixed;
  top: 0;
  right: 0;
  height: 100%;
  width: min(86vw, 360px);
  background: var(--white);
  z-index: 400;
  transform: translateX(100%);
  transition: transform 0.4s var(--ease);
  box-shadow: -20px 0 60px -30px rgba(11, 42, 87, 0.4);
  overflow-y: auto;
}
.nav-drawer.is-open { transform: translateX(0); }
.nav-drawer-inner { padding: 28px 26px 40px; display: flex; flex-direction: column; gap: 28px; }
.nav-drawer-logo .logo-img { width: 168px; height: auto; }
.nav-drawer-links { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; }
.nav-drawer-links li { border-bottom: 1px solid var(--border-light); }
.nav-drawer-links a { display: block; padding: 16px 2px; font-size: 1.05rem; font-weight: 700; color: var(--ink-900); }
.nav-drawer-cta { text-align: center; }

.nav-drawer-scrim {
  position: fixed;
  inset: 0;
  background: rgba(11, 42, 87, 0.35);
  z-index: 390;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s var(--ease), visibility 0.4s;
}
.nav-drawer-scrim.is-open { opacity: 1; visibility: visible; }

@media (max-width: 1080px) {
  .site-header nav[aria-label="Primary"] { display: none; }
  .menu-toggle { display: inline-flex; }
}

@media (max-width: 560px) {
  .btn-header-cta { display: none; }
  .nav-cta { gap: 0; }
}

@media (max-width: 480px) {
  .site-header .nav-inner { padding: 12px 16px; }
  .site-header.is-scrolled .nav-inner { padding: 9px 14px; }
}

/* FEATURE STRIP                                                           */
/* ---------------------------------------------------------------------- */

.feature-strip {
  background: var(--white);
  border-top: 1px solid var(--border-light);
  box-shadow: 0 -20px 40px -34px rgba(11, 42, 87, 0.2) inset;
  padding: 40px 0;
}

.feature-strip-inner {
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.feature-strip-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 6px 24px;
  border-left: 1px solid var(--border-light);
}
.feature-strip-item:first-child { border-left: none; padding-left: 6px; }

.feature-strip-icon { width: 34px; height: 34px; flex-shrink: 0; margin-top: 2px; }

.feature-strip-item h3 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--ink-900);
  margin: 0 0 4px;
  letter-spacing: -0.005em;
}
.feature-strip-item p {
  font-size: 0.85rem;
  line-height: 1.45;
  color: var(--slate-600);
  margin: 0;
}

@media (max-width: 1080px) {
  .feature-strip-inner { grid-template-columns: repeat(2, 1fr); gap: 24px 0; }
  .feature-strip-item:nth-child(3) { border-left: none; padding-left: 6px; }
}

@media (max-width: 480px) {
  .feature-strip-inner { grid-template-columns: 1fr; gap: 22px; padding: 0 24px; }
  .feature-strip-item { border-left: none !important; padding: 0 !important; border-bottom: 1px solid var(--border-light); padding-bottom: 20px !important; }
  .feature-strip-item:last-child { border-bottom: none; }
}