/*
 * nav.css — sticky glass header, mega menu dropdowns, mobile drawer.
 */

/* ── HEADER WRAPPER ─────────────────────────────────────── */
.tsu-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  display: flex;
  justify-content: center;
  padding: 16px 20px;
  transition: padding var(--dur-slow) var(--ease-out);
  pointer-events: none;
}

/* ── PILL BAR ────────────────────────────────────────────── */
.tsu-header__bar {
  display: flex;
  align-items: center;
  gap: 28px;
  background: rgba(255,255,255,0.10);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: var(--radius-pill);
  padding: 10px 14px 10px 18px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.18);
  max-width: 1200px;
  width: 100%;
  pointer-events: auto;
  transition:
    background       var(--dur-slow) var(--ease-out),
    border-color     var(--dur-slow) var(--ease-out),
    box-shadow       var(--dur-slow) var(--ease-out),
    padding          var(--dur-slow) var(--ease-out);
}

/* ── SCROLLED STATE ──────────────────────────────────────── */
.tsu-header.is-scrolled .tsu-header__bar {
  background: rgba(255,255,255,0.94);
  border-color: rgba(229,231,235,1);
  box-shadow: 0 4px 24px rgba(15,23,42,0.08);
}
.tsu-header.is-scrolled { padding-block: 8px; }

/* ── LOGO ────────────────────────────────────────────────── */
.tsu-header__logo {
  display: block;
  height: 32px;
  width: auto;
  flex-shrink: 0;
  transition: opacity var(--dur-base) var(--ease-out);
}
.tsu-header__logo:hover { opacity: 0.85; }
.tsu-header__logo--white { display: block; }
.tsu-header__logo--color  { display: none;  }
.tsu-header.is-scrolled .tsu-header__logo--white { display: none;  }
.tsu-header.is-scrolled .tsu-header__logo--color  { display: block; }

/* ── DESKTOP NAV ─────────────────────────────────────────── */
.tsu-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.tsu-nav__link {
  font-family: var(--font-body);
  font-weight: var(--fw-medium);
  font-size: var(--fs-sm);
  color: rgba(255,255,255,0.86);
  background: transparent;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  text-decoration: none;
  transition:
    color       var(--dur-base) var(--ease-out),
    background  var(--dur-base) var(--ease-out);
  white-space: nowrap;
}
.tsu-nav__link:hover {
  background: rgba(255,255,255,0.12);
  color: #fff;
}
.tsu-nav__link.is-active {
  background: rgba(255,255,255,0.16);
  color: #fff;
}
/* Scrolled colours */
.tsu-header.is-scrolled .tsu-nav__link        { color: var(--ink-800); }
.tsu-header.is-scrolled .tsu-nav__link:hover  { background: var(--bg-soft); color: var(--ink-800); }
.tsu-header.is-scrolled .tsu-nav__link.is-active {
  background: var(--brand-emerald-tint);
  color: var(--brand-emerald-dark);
}

/* Chevron rotation when mega menu is open */
.tsu-nav-item--mega .tsu-nav__link svg {
  transition: transform var(--dur-base) var(--ease-out);
}
.tsu-nav-item--mega:hover .tsu-nav__link svg,
.tsu-nav-item--mega:focus-within .tsu-nav__link svg {
  transform: rotate(180deg);
}

/* ── CTA AREA ────────────────────────────────────────────── */
.tsu-header__cta {
  margin-left: auto;
  display: flex;
  gap: 8px;
  align-items: center;
}
.tsu-header__phone {
  font-family: var(--font-body);
  font-weight: var(--fw-semibold);
  font-size: 13px;
  color: #fff;
  background: transparent;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  padding: 8px;
  text-decoration: none;
  transition: color var(--dur-base) var(--ease-out);
  white-space: nowrap;
}
.tsu-header.is-scrolled .tsu-header__phone { color: var(--ink-800); }

/* ── MOBILE BURGER ───────────────────────────────────────── */
.tsu-nav-burger {
  display: none;
  margin-left: auto;
  background: transparent;
  border: none;
  padding: 8px;
  color: #fff;
  transition: color var(--dur-base) var(--ease-out);
}
.tsu-header.is-scrolled .tsu-nav-burger { color: var(--ink-800); }


/* ═══════════════════════════════════════════════════════════
   MEGA MENU
   ═══════════════════════════════════════════════════════════ */

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

/* Base mega panel */
.tsu-mega {
  position: absolute;
  top: calc(100% + 14px);
  background: #fff;
  border-radius: 16px;
  box-shadow:
    0 4px 6px -2px rgba(0,0,0,0.05),
    0 20px 48px -8px rgba(0,0,0,0.18),
    0 0 0 1px rgba(0,0,0,0.06);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-6px);
  transition:
    opacity 180ms cubic-bezier(0.4,0,0.2,1),
    transform 180ms cubic-bezier(0.4,0,0.2,1),
    visibility 0s 180ms;
  z-index: calc(var(--z-nav) + 10);
}

/* Show on hover or keyboard focus */
.tsu-nav-item--mega:hover .tsu-mega,
.tsu-nav-item--mega:focus-within .tsu-mega {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
  transition:
    opacity 180ms cubic-bezier(0.4,0,0.2,1),
    transform 180ms cubic-bezier(0.4,0,0.2,1),
    visibility 0s;
}

/* Fleet mega — wide 3-column */
.tsu-mega--fleet {
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  width: 720px;
}
.tsu-nav-item--mega:hover .tsu-mega--fleet,
.tsu-nav-item--mega:focus-within .tsu-mega--fleet {
  transform: translateX(-50%) translateY(0);
}

/* Services mega — 2-column */
.tsu-mega--services {
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  width: 480px;
}
.tsu-nav-item--mega:hover .tsu-mega--services,
.tsu-nav-item--mega:focus-within .tsu-mega--services {
  transform: translateX(-50%) translateY(0);
}

/* Inner grid */
.tsu-mega__inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  padding: 28px 28px 20px;
}
.tsu-mega__inner--2col {
  grid-template-columns: repeat(2, 1fr);
}

/* Column label */
.tsu-mega__col { padding: 0 16px; }
.tsu-mega__col:first-child { padding-left: 0; }
.tsu-mega__col:last-child  { padding-right: 0; }
.tsu-mega__col + .tsu-mega__col {
  border-left: 1px solid var(--border-default, #e5e7eb);
}

.tsu-mega__label {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: var(--fw-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand-emerald, #0E7A4B);
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-default, #e5e7eb);
}

/* Link list */
.tsu-mega__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.tsu-mega__link {
  display: flex;
  align-items: center;
  font-family: var(--font-body);
  font-size: 13.5px;
  font-weight: var(--fw-regular, 400);
  color: var(--ink-600, #4b5563);
  padding: 6px 8px;
  border-radius: 6px;
  text-decoration: none;
  transition:
    color 120ms ease,
    background 120ms ease,
    padding-left 120ms ease;
  line-height: 1.3;
}
.tsu-mega__link::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--brand-emerald, #0E7A4B);
  margin-right: 8px;
  flex-shrink: 0;
  opacity: 0;
  transition: opacity 120ms ease;
}
.tsu-mega__link:hover {
  color: var(--brand-emerald, #0E7A4B);
  background: var(--brand-emerald-tint, #e8f5ef);
  padding-left: 12px;
}
.tsu-mega__link:hover::before { opacity: 1; }

/* Footer strip */
.tsu-mega__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  border-top: 1px solid var(--border-default, #e5e7eb);
  background: var(--bg-soft, #f9fafb);
  border-radius: 0 0 16px 16px;
}

.tsu-mega__footer-link {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: var(--fw-semibold);
  color: var(--brand-emerald, #0E7A4B);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  transition: gap 120ms ease;
}
.tsu-mega__footer-link:hover { gap: 10px; color: var(--brand-emerald-dark, #065f35); }


/* ── MOBILE DRAWER ───────────────────────────────────────── */
.tsu-drawer {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-nav) - 1);
  padding-top: 80px;
  background: rgba(15,23,42,0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: #fff;
  transform: translateX(100%);
  transition: transform var(--dur-slow) var(--ease-out);
}
.tsu-drawer.is-open { transform: translateX(0); }

.tsu-drawer__inner {
  padding: 24px 28px 40px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  height: 100%;
  overflow-y: auto;
}

.tsu-drawer__link {
  font-family: var(--font-display);
  font-weight: var(--fw-semibold);
  font-size: 26px;
  color: #fff;
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  text-align: left;
  padding: 14px 0;
  cursor: pointer;
  text-decoration: none;
  display: block;
  transition: color var(--dur-base) var(--ease-out);
  width: 100%;
}
.tsu-drawer__link:hover { color: var(--brand-emerald-400, #34d399); }

/* Accordion */
.tsu-drawer__accordion {
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.tsu-drawer__accordion > summary {
  list-style: none;
}
.tsu-drawer__accordion > summary::-webkit-details-marker { display: none; }

.tsu-drawer__link--accordion {
  border-bottom: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.tsu-drawer__chevron {
  display: flex;
  align-items: center;
  transition: transform var(--dur-base) var(--ease-out);
  color: rgba(255,255,255,0.5);
}
.tsu-drawer__accordion[open] .tsu-drawer__chevron {
  transform: rotate(180deg);
}

/* Accordion sub-panel */
.tsu-drawer__sub {
  padding: 0 0 16px 4px;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.tsu-drawer__sub-label {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: var(--fw-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand-emerald-400, #34d399);
  margin: 14px 0 6px;
}
.tsu-drawer__sublink {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: var(--fw-regular, 400);
  color: rgba(255,255,255,0.72);
  padding: 7px 8px;
  border-radius: 6px;
  text-decoration: none;
  display: block;
  transition: color 120ms ease, background 120ms ease;
}
.tsu-drawer__sublink:hover {
  color: #fff;
  background: rgba(255,255,255,0.06);
}
.tsu-drawer__sublink--all {
  margin-top: 6px;
  color: var(--brand-emerald-400, #34d399);
  font-weight: var(--fw-semibold);
}
.tsu-drawer__sublink--all:hover { color: #fff; background: transparent; }

.tsu-drawer__actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

/* ── RESPONSIVE ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .tsu-header__phone span { display: none; }
  .tsu-header__phone { padding: 8px 4px; }
}
@media (max-width: 900px) {
  .tsu-nav-desktop, .tsu-header__cta { display: none !important; }
  .tsu-nav-burger { display: inline-flex !important; }
}

/* ── CLOSE BUTTON ────────────────────────────────────────── */
.tsu-drawer__close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(255,255,255,0.08);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  cursor: pointer;
  transition: background var(--dur-base) var(--ease-out);
}
.tsu-drawer__close-btn:hover { background: rgba(255,255,255,0.16); }