/* ot-tpl — top navigation, brand and search */

.ot-nav {
  position: sticky;
  top: 0;
  z-index: var(--ot-z-nav);
  background: rgba(8, 8, 10, .78);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid var(--ot-border);
}
.ot-nav__inner {
  max-width: var(--ot-container);
  margin: 0 auto;
  height: var(--ot-nav-h);
  padding: 0 var(--ot-sp-6);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--ot-sp-6);
}
@media (max-width: 768px) {
  .ot-nav__inner { height: var(--ot-nav-h-m); padding: 0 var(--ot-sp-4); gap: var(--ot-sp-3); }
}

.ot-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--ot-sp-2);
  font-weight: var(--ot-fw-b);
  font-size: var(--ot-fs-lg);
  letter-spacing: -0.02em;
  color: var(--ot-text);
}
.ot-brand__dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--ot-accent);
  box-shadow: 0 0 16px var(--ot-accent-glow);
}
.ot-brand img { max-height: 32px; width: auto; }

/* Category strip */
.ot-nav__menu {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: var(--ot-sp-2);
  overflow: visible;
  scrollbar-width: none;
}
.ot-nav__menu::-webkit-scrollbar { display: none; }

.ot-nav__item {
  position: relative;
  height: 36px;
  padding: 0 var(--ot-sp-4);
  display: inline-flex;
  align-items: center;
  border-radius: var(--ot-r-pill);
  font-size: var(--ot-fs-sm);
  color: var(--ot-text-mute);
  white-space: nowrap;
  transition: all var(--ot-dur-1) var(--ot-ease);
}
.ot-nav__item:hover {
  color: var(--ot-text);
  background: var(--ot-surface-1);
}
.ot-nav__item--active {
  background: var(--ot-accent-soft);
  color: var(--ot-accent);
}

/* Dropdown for menu items with children */
.ot-nav__group {
  position: relative;
  display: inline-flex;
  align-items: center;
}
.ot-nav__group::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  height: 8px;
}
.ot-nav__pop {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 220px;
  padding: var(--ot-sp-2);
  background: var(--ot-bg-elev);
  border: 1px solid var(--ot-border-hi);
  border-radius: var(--ot-r-sm);
  box-shadow: var(--ot-shadow-2);
  display: none;
  z-index: 1;
}
.ot-nav__group:hover .ot-nav__pop,
.ot-nav__group:focus-within .ot-nav__pop { display: block; }
.ot-nav__pop a {
  display: block;
  padding: var(--ot-sp-2) var(--ot-sp-3);
  border-radius: var(--ot-r-xs);
  color: var(--ot-text-mute);
  font-size: var(--ot-fs-sm);
}
.ot-nav__pop a:hover { background: var(--ot-surface-1); color: var(--ot-text); }

/* Right side actions */
.ot-nav__actions {
  display: flex;
  align-items: center;
  gap: var(--ot-sp-3);
}

/* Search */
.ot-search {
  position: relative;
}
.ot-search__btn {
  width: 40px; height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--ot-surface-1);
  border: 1px solid var(--ot-border);
  color: var(--ot-text-mute);
  transition: all var(--ot-dur-1) var(--ot-ease);
}
.ot-search__btn:hover {
  color: var(--ot-accent);
  border-color: var(--ot-accent-soft);
}
.ot-search__btn svg { width: 18px; height: 18px; }

.ot-search__panel {
  position: fixed;
  inset: 0;
  z-index: var(--ot-z-modal);
  background: var(--ot-overlay);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: none;
  padding: var(--ot-sp-16) var(--ot-sp-4) var(--ot-sp-4);
}
.ot-search__panel--open { display: block; }
.ot-search__form {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  gap: var(--ot-sp-3);
  align-items: center;
  background: var(--ot-bg-elev);
  border: 1px solid var(--ot-border-hi);
  border-radius: var(--ot-r);
  padding: var(--ot-sp-3) var(--ot-sp-4);
}
.ot-search__input {
  flex: 1;
  height: 40px;
  font-size: var(--ot-fs-lg);
  color: var(--ot-text);
  background: transparent;
}
.ot-search__input::placeholder { color: var(--ot-text-dim); }
.ot-search__hotline {
  max-width: 720px;
  margin: var(--ot-sp-5) auto 0;
  display: flex;
  gap: var(--ot-sp-2);
  flex-wrap: wrap;
  align-items: center;
}
.ot-search__hotline-label {
  font-family: var(--ot-font-mono);
  font-size: var(--ot-fs-xs);
  color: var(--ot-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-right: var(--ot-sp-2);
}
.ot-search__close {
  position: absolute;
  top: var(--ot-sp-5);
  right: var(--ot-sp-5);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--ot-surface-1);
  color: var(--ot-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

/* Mobile menu drawer */
.ot-nav__burger {
  display: none;
  width: 40px; height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--ot-surface-1);
  border: 1px solid var(--ot-border);
}
.ot-nav__burger span,
.ot-nav__burger span::before,
.ot-nav__burger span::after {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ot-text);
  border-radius: 2px;
  transition: all var(--ot-dur-1) var(--ot-ease);
}
.ot-nav__burger span { position: relative; }
.ot-nav__burger span::before { content: ""; position: absolute; top: -6px; left: 0; }
.ot-nav__burger span::after  { content: ""; position: absolute; top:  6px; left: 0; }

.ot-drawer {
  position: fixed;
  inset: 0;
  z-index: var(--ot-z-drawer);
  background: var(--ot-overlay);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: none;
}
.ot-drawer--open { display: block; }
.ot-drawer__panel {
  position: absolute;
  top: 0; left: 0; bottom: 0;
  width: min(320px, 86vw);
  background: var(--ot-bg-elev);
  border-right: 1px solid var(--ot-border-hi);
  padding: var(--ot-sp-5);
  overflow-y: auto;
}
.ot-drawer__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--ot-sp-6);
}
.ot-drawer__close {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--ot-surface-1);
  color: var(--ot-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.ot-drawer__list a {
  display: block;
  padding: var(--ot-sp-3) var(--ot-sp-4);
  border-radius: var(--ot-r-sm);
  color: var(--ot-text-mute);
  font-size: var(--ot-fs-md);
  margin-bottom: 4px;
}
.ot-drawer__list a:hover { background: var(--ot-surface-1); color: var(--ot-text); }
.ot-drawer__group {
  margin-bottom: 4px;
}
.ot-drawer__row {
  display: grid;
  grid-template-columns: 1fr 44px;
  align-items: center;
  gap: var(--ot-sp-1);
}
.ot-drawer__row > a {
  margin-bottom: 0;
}
.ot-drawer__toggle {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--ot-r-sm);
  color: var(--ot-text-mute);
  background: var(--ot-surface-1);
}
.ot-drawer__toggle svg {
  transition: transform var(--ot-dur-1) var(--ot-ease);
}
.ot-drawer__group--open .ot-drawer__toggle {
  color: var(--ot-text);
  background: var(--ot-accent-soft);
}
.ot-drawer__group--open .ot-drawer__toggle svg {
  transform: rotate(180deg);
}
.ot-drawer__children {
  padding-left: var(--ot-sp-4);
}
.ot-drawer__children[hidden] {
  display: none;
}
.ot-drawer__children a {
  padding: var(--ot-sp-2) var(--ot-sp-3);
  font-size: var(--ot-fs-sm);
}

@media (max-width: 1023px) {
  .ot-nav__menu { display: none; }
  .ot-nav__burger { display: inline-flex; }
}