/* ==========================================================================
   header.css — Thanh điều hướng
   Nền chạy full-width, nội dung nằm trong .container
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-bg-header);
  border-bottom: 1px solid rgba(21, 80, 43, 0.07);
}

.header__inner {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: var(--header-h);
}

/* ---------------------------------------------------------------- Logo */
.brand {
  flex: none;
  display: inline-flex;
  align-items: center;
  margin-inline-end: 22px;
}
.brand img {
  height: 52px;
  width: auto;
}

/* ---------------------------------------------------------------- Menu */
.site-navigation {
  flex: 1 1 auto;
  min-width: 0;
}
/*
 * Cho phép xuống hàng: menu thật dài hơn bản dựng (6 mục, có mục "Gia công
 * OEM/ODM"), cộng lô-gô rộng 227px nên tổng bề ngang vượt container 1340px và
 * tràn đè lên ô tìm kiếm, hotline, nút báo giá. Bật wrap để menu tụt xuống
 * hàng dưới chứ không bao giờ chồng lên khối khác.
 */
.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 16px;
}
.nav-list > li {
  position: relative;
}
.nav-list > li > a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 24px 0;
  font-size: var(--fs-nav);
  font-weight: 500;
  color: var(--c-nav);
  white-space: nowrap;
}
.nav-list > li > a:hover {
  color: var(--c-green-800);
}
.nav-list > li.is-current > a {
  color: var(--c-green-800);
  font-weight: 600;
}
.nav-list > li.is-current > a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  border-radius: 3px 3px 0 0;
  background: var(--c-gold-500);
}

/* Menu con */
.has-sub > a .icon {
  font-size: 0.7em;
  transition: transform var(--t-fast);
}
.sub-menu {
  position: absolute;
  top: 100%;
  left: -14px;
  min-width: 232px;
  padding: 8px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity var(--t-base), transform var(--t-base), visibility var(--t-base);
}
.has-sub:hover > .sub-menu,
.has-sub:focus-within > .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.has-sub:hover > a .icon {
  transform: rotate(180deg);
}
.sub-menu a {
  display: block;
  padding: 9px 12px;
  font-size: 14px;
  color: var(--c-body);
  border-radius: var(--radius-xs);
}
.sub-menu a:hover {
  background: var(--c-surface-green);
  color: var(--c-green-800);
}

/* ---------------------------------------------------------------- Tìm kiếm */
.header__search {
  flex: 0 1 auto;
  position: relative;
  width: 176px;
  min-width: 0;
}
.header__search .input {
  height: 38px;
  padding: 0 40px 0 14px;
  font-size: 14px;
  border-radius: var(--radius-sm);
  background: #fff;
}
.header__search button {
  position: absolute;
  top: 50%;
  right: 4px;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  font-size: 17px;
  color: var(--c-green-800);
  border-radius: var(--radius-xs);
}
.header__search button:hover {
  background: var(--c-surface-green);
}

/* ---------------------------------------------------------------- Hotline */
.header__phone {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 16px 7px 8px;
  background: var(--c-green-800);
  border-radius: var(--radius-sm);
  color: #fff;
}
.header__phone:hover {
  background: var(--c-green-700);
  color: #fff;
}
.header__phone .phone-ring {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  font-size: 15px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
}
.header__phone b {
  display: block;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.01em;
}
.header__phone span {
  display: block;
  font-size: 12px;
  color: var(--c-on-dark-soft);
  line-height: 1.2;
}

.header__cta {
  flex: none;
}

/* ---------------------------------------------------------------- Nút menu mobile */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-inline-start: auto;
  font-size: 22px;
  color: var(--c-green-800);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
}
.nav-toggle .icon-close {
  display: none;
}
.nav-toggle[aria-expanded="true"] .icon-open {
  display: none;
}
.nav-toggle[aria-expanded="true"] .icon-close {
  display: block;
}

.nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: 98;
  background: rgba(16, 40, 24, 0.44);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t-base), visibility var(--t-base);
}
body.nav-open .nav-backdrop {
  opacity: 1;
  visibility: visible;
}

.site-header.is-stuck {
  box-shadow: 0 2px 14px rgba(20, 45, 30, 0.08);
}