/* ==========================================
   HEADER & FOOTER - SHARED STYLES (REFACTORED)
   File: header-footer.css
   Dùng chung cho tất cả các trang
   Class names: Rõ ràng, semantic, dễ hiểu
   ========================================== */

/* ==========================================
   PAGE CONTAINER
   ========================================== */
.page-container {
  background-color: #ffffff;
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ==========================================
   HEADER - FIXED NAVIGATION
   ========================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  z-index: 1000;
  padding: 16px 32px;
  transition: all 0.3s ease;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 40px;
  max-width: 1216px;
  margin: 0 auto;
  width: 100%;
}

.header-content .main-nav {
  margin-left: auto;
}

/* Position mobile menu toggle on the right */
.header-content .mobile-menu-toggle {
  margin-left: auto;
}

/* Logo Section */
.logo-link {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  transition: transform 0.3s;
}

.logo-link:hover {
  transform: scale(1.02);
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand-name {
  font-size: 24px;
  font-weight: 700;
  color: #193cb8;
  line-height: 1.2;
}

.brand-tagline {
  font-size: 14px;
  font-weight: 400;
  color: #666;
  line-height: 1.2;
}

/* Main Navigation */
.main-nav {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-link {
  text-decoration: none;
  color: #333;
  font-size: 16px;
  font-weight: 500;
  transition: all 0.3s;
  position: relative;
  padding: 8px 0;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #193cb8, #155dfc);
  transition: width 0.3s ease;
}

.nav-link:hover,
.active {
  color: #193cb8;
}

.nav-link:hover::after {
  width: 100%;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.mobile-menu-toggle span {
  width: 28px;
  height: 3px;
  background-color: #193cb8;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translateY(10px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translateY(-10px);
}

/* ==========================================
   FOOTER SECTION
   ========================================== */
.site-footer {
  background-color: #1a1a2e;
  color: #ffffff;
  padding: 60px 32px 30px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 60px;
  max-width: 1216px;
  margin: 0 auto 40px;
  padding: 0 32px;
}

.footer-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer-title {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin: 0;
  white-space: nowrap;
}

.footer-description {
  font-size: 14px;
  color: #b0b0b0;
  line-height: 1.6;
  margin: 12px 0 0 0;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 12px;
}

.footer-link-item {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-link {
  text-decoration: none;
  color: #ffffff;
  font-size: 14px;
  transition: color 0.3s;
}

.footer-link:hover {
  color: #155dfc;
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid #333;
  max-width: 1216px;
  margin: 0 auto;
  padding-left: 32px;
  padding-right: 32px;
}

.footer-copyright {
  font-size: 14px;
  color: #888;
  margin: 0;
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */

/* Tablet: 800px - 1279px */
@media (max-width: 1279px) and (min-width: 800px) {
  .site-header {
    padding: 14px 24px;
  }

  .brand-name {
    font-size: 20px;
  }

  .brand-tagline {
    font-size: 12px;
  }

  .logo-icon i {
    font-size: 32px !important;
  }

  .main-nav {
    gap: 20px;
  }

  .nav-link {
    font-size: 14px;
  }

  .mobile-menu-toggle {
    display: none;
  }

  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }
}

/* Mobile: ≤ 799px */
@media (max-width: 799px) {
  .site-header {
    padding: 12px 16px;
  }

  .brand-name {
    font-size: 18px;
  }

  .brand-tagline {
    font-size: 11px;
  }

  .logo-icon i {
    font-size: 28px !important;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .main-nav {
    display: flex;
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding: 32px 20px;
    gap: 24px;
    transition: left 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  }

  .main-nav.active {
    left: 0;
  }

  .nav-link {
    font-size: 18px;
    width: 100%;
    text-align: center;
    padding: 16px 0;
    border-bottom: 1px solid #e5e7eb;
  }

  .nav-link:last-child {
    border-bottom: none;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 0 16px;
  }

  .site-footer {
    padding: 40px 16px 20px;
  }

  .footer-title {
    font-size: 18px;
  }

  .footer-link {
    font-size: 13px;
  }
}