/* ========== FONT CHỮ CHO TIẾNG VIỆT ========== */
* {
  font-family: "Inter", "Be Vietnam Pro", Arial, Helvetica, sans-serif;
}

/* Font cho tiêu đề chính */
h1,
h2,
.commitment-title,
.hero h1,
.courses-hero h1 {
  font-family: "Playfair Display", "Times New Roman", serif;
}

/* Font cho tiêu đề phụ */
h3,
h4,
.commitment-subtitle,
.card-title {
  font-family: "Be Vietnam Pro", "Segoe UI", sans-serif;
  font-weight: 600;
}
* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
  color: black;
}
ul {
  list-style-type: none;
}
a {
  text-decoration: none;
}
/* ========== HEADER MÀU TRẮNG ========== */
header {
  background: #ffffff;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
  position: relative;
  z-index: 99;
}

/* Phần information top - màu trắng */
.information {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 50px;
  background: #ffffff;
  border-bottom: 1px solid #f0f0f0;
  flex-wrap: wrap;
  gap: 15px;
}

.informationtext {
  display: flex;
  align-items: center;
}

/* Logo */
.informationtextlogo {
  flex-shrink: 0;
}

.informationimg {
  width: 55px;
  height: 55px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid #e67e22;
  transition: transform 0.3s ease;
}

.informationimg:hover {
  transform: scale(1.05);
}

/* Tên trung tâm */
.informationtextname {
  flex: 2;
  justify-content: center;
}

.informationtextname2 {
  font-size: 28px;
  font-weight: 800;
  color: #e67e22;
  letter-spacing: 2px;
  font-family: "Times New Roman", Times, serif;
}

/* Liên hệ Zalo */
.informationtextcall {
  gap: 10px;
  background: #f8f9fa;
  padding: 8px 18px;
  border-radius: 50px;
  transition: all 0.3s ease;
  border: 1px solid #e9ecef;
}

.informationtextcall:hover {
  background: #fff5e6;
  border-color: #e67e22;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(230, 126, 34, 0.15);
}

.callimg {
  width: 28px;
  height: 28px;
}

.informationtextcall1 {
  font-size: 11px;
  color: #6c757d;
  letter-spacing: 1px;
}

.informationtextcall2 {
  font-size: 14px;
  font-weight: 700;
  color: #e67e22;
}

/* Hỗ trợ 24/7 */
.informationtextsupport {
  gap: 10px;
  background: #f8f9fa;
  padding: 8px 18px;
  border-radius: 50px;
  transition: all 0.3s ease;
  border: 1px solid #e9ecef;
}

.informationtextsupport:hover {
  background: #e8f5e9;
  border-color: #4caf50;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(76, 175, 80, 0.15);
}

.supportimg {
  width: 28px;
  height: 28px;
}

.informationtextsupport1 {
  font-size: 11px;
  color: #6c757d;
  letter-spacing: 1px;
}

.informationtextsupport2 {
  font-size: 16px;
  font-weight: 700;
  color: #4caf50;
}

/* ========== RESPONSIVE CHO HEADER MÀU TRẮNG ========== */

/* Tablet */
@media screen and (max-width: 1024px) {
  .information {
    padding: 10px 25px;
  }

  .informationtextname2 {
    font-size: 22px;
  }

  .informationtextcall2 {
    font-size: 12px;
  }

  .informationtextsupport2 {
    font-size: 14px;
  }
}

/* Mobile */
@media screen and (max-width: 768px) {
  .information {
    flex-direction: column;
    padding: 12px 20px;
    gap: 12px;
  }

  .informationtextlogo {
    order: 1;
  }

  .informationtextname {
    order: 2;
    width: 100%;
  }

  .informationtextname2 {
    font-size: 20px;
    text-align: center;
  }

  .informationtextcall {
    order: 3;
    width: 100%;
    justify-content: center;
    padding: 8px 15px;
  }

  .informationtextcall2 {
    font-size: 13px;
  }

  .informationtextsupport {
    order: 4;
    width: 100%;
    justify-content: center;
    padding: 8px 15px;
  }

  .informationtextsupport2 {
    font-size: 14px;
  }
}

/* Mobile nhỏ */
@media screen and (max-width: 480px) {
  .information {
    padding: 10px 15px;
  }

  .informationtextname2 {
    font-size: 18px;
  }

  .informationtextcall2 {
    font-size: 11px;
  }

  .informationtextsupport2 {
    font-size: 12px;
  }

  .callimg,
  .supportimg {
    width: 22px;
    height: 22px;
  }

  .informationtextcall,
  .informationtextsupport {
    padding: 6px 12px;
  }

  .informationtextcall1,
  .informationtextsupport1 {
    font-size: 9px;
  }
}
/* ========== NAVIGATION HIỆN ĐẠI - MÀU CAM ========== */

/* Container chính của navigation */
.nav-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: linear-gradient(135deg, #e67e22, #d35400);
  padding: 0 40px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  position: relative;
  z-index: 1000;
}

/* Phần menu chính - căn giữa */
.nav-main {
  flex: 1;
  display: flex;
  justify-content: center;
}

/* Danh sách menu chính */
.nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 5px;
}

/* Mỗi item trong menu */
.nav-item {
  position: relative;
}

/* Link trong menu */
.nav-item > a {
  display: block;
  padding: 20px 22px;
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
  position: relative;
}

/* Hiệu ứng gạch chân khi hover */
.nav-item > a::after {
  content: "";
  position: absolute;
  bottom: 14px;
  left: 50%;
  width: 0;
  height: 3px;
  background: #ffffff;
  border-radius: 3px;
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

/* Khi hover vào link */
.nav-item > a:hover {
  color: #fff5e6;
}

/* Khi hover, gạch chân chạy ra */
.nav-item > a:hover::after {
  width: 70%;
}

/* Hiệu ứng active (trang hiện tại) */
.nav-item.active > a {
  color: #fff5e6;
}

.nav-item.active > a::after {
  width: 70%;
}

/* ===== DROPDOWN MENU ===== */
.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  background: #ffffff;
  min-width: 220px;
  list-style: none;
  padding: 12px 0;
  margin: 0;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 100;
  transform: translateY(10px);
}

.nav-item:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* Dropdown item */
.dropdown li a {
  display: block;
  padding: 10px 20px;
  color: #333;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s ease;
  position: relative;
}

/* Hiệu ứng hover cho dropdown item */
.dropdown li a:hover {
  background: linear-gradient(90deg, #e67e2220, #d3540020);
  color: #e67e22;
  padding-left: 28px;
}

/* Gạch chân cho dropdown item khi hover */
.dropdown li a::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 50%;
  width: 0;
  height: 2px;
  background: #e67e22;
  transform: translateY(-50%);
  transition: width 0.2s ease;
}

.dropdown li a:hover::before {
  width: 8px;
}

/* ===== DROPDOWN CẤP 2 (SUB MENU) ===== */
.dropdown-sub {
  position: relative;
}

.dropdown-sub > span {
  display: block;
  padding: 10px 20px;
  color: #333;
  font-size: 14px;
  font-weight: 600;
  cursor: default;
  position: relative;
}

.dropdown-sub > span::after {
  content: "›";
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  color: #e67e22;
}

.sub-dropdown {
  position: absolute;
  left: 100%;
  top: 0;
  background: #ffffff;
  min-width: 180px;
  list-style: none;
  padding: 10px 0;
  margin: 0;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.dropdown-sub:hover .sub-dropdown {
  opacity: 1;
  visibility: visible;
}

.sub-dropdown li a {
  display: block;
  padding: 8px 18px;
  color: #555;
  text-decoration: none;
  font-size: 13px;
  transition: all 0.2s ease;
}

.sub-dropdown li a:hover {
  background: #e67e2210;
  color: #e67e22;
  padding-left: 25px;
}

/* ===== NÚT ĐĂNG KÝ ===== */
.register-btn {
  flex-shrink: 0;
}

.register-btn a {
  display: block;
  background: #ffffff;
  color: #e67e22;
  padding: 10px 28px;
  border-radius: 40px;
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 1px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.register-btn a:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  background: #f5f5f5;
  color: #d35400;
}

/* ===== MOBILE MENU ===== */
.mobile-menu {
  display: none;
}

.menu-toggle {
  cursor: pointer;
  padding: 15px;
  z-index: 1001;
}

.menu-toggle .bar {
  width: 28px;
  height: 3px;
  background-color: white;
  margin: 5px 0;
  transition: 0.3s;
  border-radius: 3px;
}

/* Responsive cho màn hình nhỏ hơn 768px */
@media screen and (max-width: 768px) {
  .mobile-menu {
    display: block;
  }

  .nav-main {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: linear-gradient(135deg, #e67e22, #d35400);
    z-index: 200;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .nav-main.active {
    max-height: 500px;
    overflow-y: auto;
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
    justify-content: flex-start;
  }

  .nav-item > a {
    padding: 15px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  /* Hiện lại menu item trên mobile */
  .nav-item:first-child {
    display: block;
  }

  .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    display: none;
    box-shadow: none;
    background: rgba(255, 255, 255, 0.1);
    transform: none;
    border-radius: 0;
    margin: 0;
    width: 100%;
  }

  .nav-item.has-dropdown:hover .dropdown,
  .nav-item.has-dropdown .dropdown.show {
    display: block;
  }

  .dropdown li a {
    padding: 12px 20px 12px 40px;
    color: #fff;
  }

  .dropdown li a:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #fff5e6;
  }

  .sub-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    display: none;
    box-shadow: none;
    padding-left: 20px;
    width: 100%;
  }

  .dropdown-sub:hover .sub-dropdown,
  .dropdown-sub .sub-dropdown.show {
    display: block;
  }

  .dropdown-sub > span {
    padding: 12px 20px 12px 40px;
    color: #fff;
    display: block;
  }

  .dropdown-sub > span::after {
    right: 20px;
  }

  .register-btn {
    margin: 15px 20px;
  }

  .register-btn a {
    text-align: center;
  }
}

/* ===== HIỆU ỨNG ĐẸP THÊM ===== */

/* Hiệu ứng sáng lướt khi hover */
.nav-item > a {
  position: relative;
  overflow: hidden;
}

.nav-item > a::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.15),
    transparent
  );
  transition: left 0.5s ease;
}

.nav-item > a:hover::before {
  left: 100%;
}

/* ========== FOOTER ========== */
.footer {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  color: #ffffff;
  margin-top: 60px;
  position: relative;
}

.footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #e67e22, #d35400, #e67e22);
}

.footer-container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 60px 40px 30px;
}

.footer-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

/* Logo */
.footer-logo {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 20px;
}

.footer-logo img {
  width: 55px;
  height: 55px;
  border-radius: 50%;
  border: 2px solid #e67e22;
}

.footer-logo h3 {
  font-size: 20px;
  background: linear-gradient(135deg, #e67e22, #d35400);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 700;
}

.footer-desc {
  color: #b0b0b0;
  line-height: 1.7;
  margin-bottom: 25px;
  font-size: 14px;
}

/* Social icons */
.footer-social {
  display: flex;
  gap: 15px;
}

.social-icon {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  font-size: 20px;
  text-decoration: none;
  color: white;
}

.social-icon:hover {
  background: linear-gradient(135deg, #e67e22, #d35400);
  transform: translateY(-3px);
}

/* Footer headings */
.footer-col h4 {
  font-size: 18px;
  margin-bottom: 25px;
  position: relative;
  padding-bottom: 12px;
  color: #ffffff;
}

.footer-col h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 3px;
  background: linear-gradient(90deg, #e67e22, #d35400);
  border-radius: 3px;
}

/* Contact list */
.footer-contact {
  list-style: none;
  padding: 0;
}

.footer-contact li {
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: #b0b0b0;
  font-size: 14px;
  line-height: 1.5;
}

.footer-contact li span {
  font-size: 18px;
  min-width: 30px;
}

/* Footer links */
.footer-links {
  list-style: none;
  padding: 0;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: #b0b0b0;
  text-decoration: none;
  transition: all 0.3s ease;
  font-size: 14px;
  display: inline-block;
}

.footer-links a:hover {
  color: #e67e22;
  transform: translateX(5px);
}

/* Footer bottom */
.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 20px;
}

.footer-bottom p {
  color: #888;
  font-size: 13px;
  margin: 5px 0;
}

.footer-bottom span {
  color: #e67e22;
  font-weight: 600;
}

/* Responsive footer */
@media screen and (max-width: 768px) {
  .footer-container {
    padding: 40px 20px 20px;
  }

  .footer-row {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-logo {
    justify-content: center;
  }

  .footer-desc {
    text-align: center;
  }

  .footer-social {
    justify-content: center;
  }

  .footer-col h4 {
    text-align: center;
  }

  .footer-col h4::after {
    left: 50%;
    transform: translateX(-50%);
  }

  .footer-contact li {
    justify-content: center;
  }

  .footer-links {
    text-align: center;
  }

  .footer-links a:hover {
    transform: translateX(0) scale(1.05);
  }
}
/* ========== FIX FOOTER LUÔN Ở DƯỚI CÙNG ========== */
html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1;
}

.footer {
  margin-top: auto;
}
/* ========== STICKY NAVIGATION - HOẠT ĐỘNG 100% ========== */

/* Header - không sticky */
header {
  position: relative;
  z-index: 99;
}

/* Navigation - sẽ dính */
.nav-wrapper {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: linear-gradient(135deg, #e67e22, #d35400);
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
}

/* Đảm bảo body không bị ảnh hưởng */
body {
  overflow-x: hidden;
}

/* Tạo hiệu ứng khi cuộn */
@keyframes slideDown {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.nav-wrapper {
  animation: slideDown 0.3s ease-out;
}