/* ==========================================================================
   header-footer.css — Header + Footer bám sát Figma (node 1134:25)
   ========================================================================== */

/* -------- Sentinel cho IntersectionObserver -------- */
.header-sentinel {
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}

/* ===================== Header ===================== */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1030;
  background-color: transparent;
  transition:
    background-color var(--transition-base),
    backdrop-filter var(--transition-base),
    box-shadow var(--transition-base),
    transform 0.35s var(--ease-out-soft, ease);
}

.site-header .navbar {
  min-height: 80px;
  transition: min-height 0.3s var(--ease-out-soft, ease);
}

.site-header.is-scrolled {
  background-color: rgba(8, 15, 29, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.25);
}

/* Khi cuộn xuống: header thu gọn chiều cao */
.site-header.is-scrolled .navbar {
  min-height: 60px;
}

.site-header.is-scrolled .brand-logo {
  height: 44px;
}

/* Tự ẩn sau vài giây — trượt lên khỏi màn hình */
.site-header.is-hidden {
  transform: translateY(-100%);
}

/* Vùng cảm ứng mỏng ở đỉnh để hover gọi header hiện lại khi đang ẩn */
.header-hover-zone {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 24px;
  z-index: 1029;
  pointer-events: auto;
}

/* Logo */
.brand-logo {
  height: 56px;
  width: auto;
  display: block;
}

/* Nav links — trắng, 18px medium, tracking nhẹ */
.site-header .nav-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: #ffffff;
  font-weight: 500;
  font-size: 1.0625rem;
  letter-spacing: 0.02em;
  padding-inline: 0;
  transition: color var(--transition-base);
}

.site-header .navbar-nav {
  gap: 28px;
}

.site-header .nav-link:hover,
.site-header .nav-link.active {
  color: var(--dsh-red);
}

/* Caret dropdown */
.nav-caret::after {
  content: "";
  width: 12px;
  height: 12px;
  margin-left: 2px;
  background: currentColor;
  -webkit-mask: url("../images/caret-down.svg") center / contain no-repeat;
  mask: url("../images/caret-down.svg") center / contain no-repeat;
}

/* Dropdown menu "Về chúng tôi" — nền tối, viền vàng mảnh, khớp header */
.site-header .dropdown-menu.dsh-dropdown {
  --bs-dropdown-min-width: 232px;
  background: rgba(8, 15, 29, 0.97);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--dsh-line);
  border-radius: var(--radius);
  padding: 8px;
  margin-top: 14px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

.site-header .dsh-dropdown .dropdown-item {
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 10px 14px;
  border-radius: 6px;
  transition:
    background-color 0.25s ease,
    color 0.25s ease,
    padding-left 0.25s var(--ease-out-soft, ease);
}

.site-header .dsh-dropdown .dropdown-item:hover,
.site-header .dsh-dropdown .dropdown-item:focus,
.site-header .dsh-dropdown .dropdown-item.active {
  background: rgba(154, 18, 32, 0.18);
  color: #ffffff;
  padding-left: 18px;
}

/* CTA "Liên hệ ngay" — đỏ, chữ 13px */
.btn-contact {
  --bs-btn-padding-x: 24px;
  --bs-btn-padding-y: 10px;
  --bs-btn-border-radius: 0.25rem;
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
}

/* Toggler trên nền tối */
.site-header .navbar-toggler {
  border-color: rgba(255, 255, 255, 0.35);
}
.site-header .navbar-toggler:focus {
  box-shadow: none;
}
.site-header .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255,255,255,0.85)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

@media (max-width: 991.98px) {
  .site-header .navbar-collapse {
    background-color: rgba(8, 15, 29, 0.96);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    margin-top: var(--space-3);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    border: 1px solid var(--dsh-line);
  }
  .site-header .navbar-nav {
    gap: 8px;
  }

  /* Logo gọn hơn trên mobile (khớp op1-3-mobile) */
  .brand-logo {
    height: 40px;
  }

  /* CTA mobile: nền trắng, chữ đỏ (nhãn ngắn "Liên hệ") */
  .btn-contact {
    --bs-btn-color: var(--dsh-red);
    --bs-btn-bg: #ffffff;
    --bs-btn-border-color: #ffffff;
    --bs-btn-hover-color: var(--dsh-red);
    --bs-btn-hover-bg: rgba(255, 255, 255, 0.9);
    --bs-btn-hover-border-color: rgba(255, 255, 255, 0.9);
    --bs-btn-border-radius: 8px;
    font-weight: 600;
  }

  /* Hamburger: nút vuông bo góc, viền mảnh sáng */
  .site-header .navbar-toggler {
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: 10px;
    background-color: rgba(0, 0, 0, 0.18);
  }
}

/* ===================== Footer ===================== */
.site-footer {
  background-color: var(--dsh-navy);
}

/* -------- CTA banner nền ảnh cầu -------- */
.cta-banner {
  position: relative;
  background-color: #101c36;
  min-height: clamp(360px, 30vw, 640px);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.cta-banner .cta-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* Neo lên trên (~35%) để giữ trời + trụ + mặt cầu, cắt tiền cảnh dưới như thiết kế */
  object-position: center 54%;
}

/* Lớp phủ tối trên ảnh cầu: nhẹ ở trên → đậm dần thành navy ở đáy để hoà vào 4 cột */
.cta-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: linear-gradient(
    180deg,
    rgba(8, 15, 29, 0.32) 0%,
    rgba(8, 15, 29, 0.2) 45%,
    rgba(16, 28, 54, 0.85) 100%
  );
}

.cta-inner {
  position: relative;
  z-index: 1;
  padding: clamp(3rem, 8vw, 6rem) 1rem;
}

.cta-title {
  color: #ffffff;
  font-family: var(--font-body);
  font-weight: 800;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  font-size: clamp(2rem, 5vw, 3.75rem);
  line-height: 1.3;
  margin-bottom: clamp(1.5rem, 4vw, 2.75rem);
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.4);
}

.cta-btn {
  --bs-btn-padding-x: 36px;
  --bs-btn-padding-y: 16px;
  --bs-btn-border-radius: 8px;
  font-size: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.cta-btn .btn-arrow {
  width: 14px;
  height: 14px;
}

/* -------- Khối cột -------- */
.footer-main {
  padding-block: clamp(3rem, 6vw, 4.5rem);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-logo {
  height: 72px;
  width: auto;
}

.site-footer h6 {
  color: #ffffff;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.01em;
  margin-bottom: var(--space-4);
}

.site-footer .footer-link {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  display: inline-block;
  font-size: 0.875rem;
  padding-block: 5px;
  transition:
    color var(--transition-base),
    padding-left var(--transition-base);
}

.site-footer .footer-link:hover {
  color: var(--dsh-red);
  padding-left: 4px;
}

/* Liên hệ (icon đỏ vuông + nhãn) */
.footer-contact li {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  margin-bottom: var(--space-3);
}

.footer-contact .contact-ic {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background-color: var(--dsh-red);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.footer-contact .contact-ic img {
  width: 12px;
  height: 12px;
}

.footer-contact span small {
  display: block;
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.72rem;
  margin-bottom: 2px;
}

.footer-contact span strong {
  display: block;
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 700;
}

/* Social — ô viền vuông */
.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid rgba(255, 255, 255, 0.74);
  color: #ffffff;
  transition:
    background-color var(--transition-base),
    border-color var(--transition-base);
}

.social-links a img {
  width: 13px;
  height: 13px;
}

.social-links a:hover {
  background-color: var(--dsh-red);
  border-color: var(--dsh-red);
}

/* -------- Thanh dưới cùng -------- */
.footer-bottom {
  padding-block: var(--space-4);
}

.footer-bottom p,
.footer-bottom .footer-link {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.875rem;
}

.footer-bottom .footer-link {
  padding-block: 0;
}