/* ==========================================================================
   layout.css — Navbar & Footer styles for 704 Diesel & Welding Services
   All values reference CSS variables from /css/base.css
   ========================================================================== */

/* ==========================================================================
   1. HEADER / TOP BAR
   ========================================================================== */

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  transition: background var(--duration-normal) var(--ease-default),
              box-shadow var(--duration-normal) var(--ease-default);
}

.top-bar {
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-2) 0;
  font-size: var(--font-size-xs);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.top-bar .container {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}

.top-bar a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-default);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.top-bar a:hover {
  color: var(--color-accent);
}

.top-bar-left {
  display: flex;
  gap: var(--space-4);
  align-items: center;
}

.top-bar-right {
  display: flex;
  gap: var(--space-4);
  align-items: center;
  color: rgba(255, 255, 255, 0.7);
}

/* Hide top bar on mobile — too cluttered */
@media (max-width: 768px) {
  .top-bar {
    display: none;
  }
}

/* ==========================================================================
   2. MAIN NAVBAR
   ========================================================================== */

.navbar {
  background: var(--color-primary);
  padding: var(--space-3) 0;
}

.navbar .container {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.navbar-brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.navbar-brand img {
  height: 48px;
  width: auto;
}

.navbar-nav {
  display: none;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  margin: 0;
  padding: 0;
}

@media (min-width: 1025px) {
  .navbar-nav {
    display: flex;
  }
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--nav-link-padding);
  font-size: var(--nav-link-font-size);
  font-weight: var(--font-weight-medium);
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: color var(--duration-fast) var(--ease-default),
              background var(--duration-fast) var(--ease-default);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent);
  background: rgba(255, 255, 255, 0.05);
}

/* Chevron icon inside nav links */
.nav-link .nav-chevron {
  width: 14px;
  height: 14px;
  opacity: 0.6;
  transition: transform var(--duration-fast) var(--ease-default);
}

.has-megamenu:hover .nav-link .nav-chevron,
.has-dropdown:hover .nav-link .nav-chevron {
  transform: rotate(180deg);
  opacity: 1;
}

.navbar-cta {
  display: none;
}

@media (min-width: 1025px) {
  .navbar-cta {
    display: flex;
  }
}

/* ==========================================================================
   3. HEADER SCROLLED STATE
   ========================================================================== */

header.scrolled {
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

header.scrolled .top-bar {
  display: none;
}

/* ==========================================================================
   4. MEGAMENU (Services — 7 items)
   ========================================================================== */

.has-megamenu,
.has-dropdown {
  position: relative;
}

/* --- Megamenu panel --- */
.megamenu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 700px;
  background: #111;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  padding: var(--space-6);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
  z-index: var(--z-dropdown);
}

/* Invisible bridge — prevents gap between trigger and panel closing the menu */
.megamenu::before {
  content: '';
  position: absolute;
  bottom: 100%;
  left: 0;
  width: 100%;
  height: 20px;
}

/* Adjust bridge for scrolled header (top-bar hidden, smaller gap) */
header.scrolled .megamenu::before {
  height: 12px;
}

header.scrolled .megamenu {
  transform: translateX(-50%) translateY(4px);
}

.has-megamenu:hover .megamenu,
.has-megamenu:focus-within .megamenu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

/* Megamenu section heading */
.megamenu-heading {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-widest);
  color: var(--color-accent);
  margin-bottom: var(--space-3);
  padding: 0 var(--space-3);
}

/* Megamenu link grid */
.megamenu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: var(--space-2);
  list-style: none;
  padding: 0;
  margin: 0;
}

.megamenu-grid a {
  display: block;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: background 0.15s ease, color 0.15s ease;
}

.megamenu-grid a:hover {
  background: rgba(59, 247, 209, 0.1);
  color: var(--color-accent);
}

/* --- Standard dropdown (Service Areas — 6 items) --- */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 240px;
  background: #111;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  padding: var(--space-2);
  list-style: none;
  margin: 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: var(--z-dropdown);
}

/* Bridge for standard dropdown */
.dropdown-menu::before {
  content: '';
  position: absolute;
  bottom: 100%;
  left: 0;
  width: 100%;
  height: 16px;
}

header.scrolled .dropdown-menu {
  transform: translateX(-50%) translateY(4px);
}

header.scrolled .dropdown-menu::before {
  height: 8px;
}

.has-dropdown:hover .dropdown-menu,
.has-dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.dropdown-menu li a {
  display: block;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}

.dropdown-menu li a:hover {
  background: rgba(59, 247, 209, 0.1);
  color: var(--color-accent);
}

/* ==========================================================================
   5. HAMBURGER / MOBILE TOGGLE
   ========================================================================== */

.navbar-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  cursor: pointer;
  color: #fff;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: color var(--duration-fast) var(--ease-default);
  min-width: 44px;
  min-height: 44px;
}

.navbar-toggle:hover {
  color: var(--color-accent);
}

@media (min-width: 1025px) {
  .navbar-toggle {
    display: none;
  }
}

/* ==========================================================================
   6. MOBILE DRAWER
   ========================================================================== */

.mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(360px, 100vw);
  height: 100vh;
  background: #111;
  z-index: var(--z-drawer);
  transform: translateX(100%);
  transition: transform var(--duration-moderate) var(--ease-default);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  padding: var(--space-6);
}

.mobile-drawer.open {
  transform: translateX(0);
}

/* Overlay backdrop — pointer-events: none by default to avoid blocking page clicks */
.mobile-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: var(--z-backdrop);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease-default),
              visibility var(--duration-normal) var(--ease-default);
}

.mobile-drawer-overlay.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* Close (X) button inside drawer */
.mobile-drawer-close {
  background: transparent;
  border: none;
  color: #fff;
  cursor: pointer;
  align-self: flex-end;
  padding: var(--space-2);
  margin-bottom: var(--space-4);
  border-radius: var(--radius-md);
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--duration-fast) var(--ease-default);
}

.mobile-drawer-close:hover {
  color: var(--color-accent);
}

/* Mobile nav list */
.mobile-nav {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.mobile-nav a {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: background var(--duration-fast), color var(--duration-fast);
  min-height: 44px;
  display: flex;
  align-items: center;
}

.mobile-nav a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-accent);
}

/* Section label within mobile nav (e.g., "Services", "Service Areas") */
.mobile-nav-section-title {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-widest);
  color: var(--color-accent);
  padding: var(--space-3) var(--space-4) var(--space-1);
}

/* Sub-items indented beneath section */
.mobile-nav-sub {
  padding-left: var(--space-4);
}

.mobile-nav-sub a {
  font-size: var(--font-size-sm);
  padding: var(--space-2) var(--space-4);
  color: rgba(255, 255, 255, 0.7);
  min-height: 44px;
}

.mobile-nav-sub a:hover {
  color: var(--color-accent);
  background: rgba(255, 255, 255, 0.05);
}

/* CTA buttons pinned to the bottom of the drawer */
.mobile-drawer-cta {
  margin-top: auto;
  padding-top: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* ==========================================================================
   7. FOOTER
   ========================================================================== */

.footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  padding: var(--space-16) 0 var(--space-8);
}

.footer .container {
  flex-direction: column;
  gap: var(--space-12);
}

/* Four-column grid: brand (wide) + 3 link/contact columns */
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* Brand column */
.footer-brand img {
  height: 56px;
  width: auto;
  margin-bottom: var(--space-4);
}

.footer-brand p {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
  line-height: var(--line-height-relaxed);
  max-width: 280px;
}

/* Column headings */
.footer-heading {
  font-family: var(--font-heading);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  color: #fff;
  margin-bottom: var(--space-4);
}

/* Footer link lists */
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-default);
}

.footer-links a:hover {
  color: var(--color-accent);
}

/* Contact info items (icon + text) */
.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-3);
}

.footer-contact-item svg {
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-contact-item a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-default);
}

.footer-contact-item a:hover {
  color: var(--color-accent);
}

/* Footer bottom bar */
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-bottom p {
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.4);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-default);
}

.footer-bottom a:hover {
  color: var(--color-accent);
}

/* Teal accent bar at top of footer */
.footer-accent-bar {
  height: 3px;
  background: var(--color-accent);
  width: 100%;
}