* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Arial", sans-serif;
}

header {
    background-color: #083d8c;
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 50px;
}

.logo {
    font-size: 20px;
    font-weight: bold;
}
.logo .blue {
    color: white;
}
.logo .yellow {
    background-color: #ffcc00;
    color: black;
    padding: 2px 6px;
    margin-left: 4px;
    border-radius: 3px;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 25px;
    align-items: center;
}
nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 8px 0;
    display: inline-block;
    transition: 0.3s;
}
nav ul li:nth-child(n+2):nth-child(-n+7) a:hover {
    color: #ffcc00;
    border-bottom: 2px solid #ffcc00;
    transform: translateY(-2px);
}
nav .highlight {
    background-color: #ffcc00;
    color: black;
    padding: 8px 12px;
    border-radius: 4px;
}

nav .highlight:hover {
    background-color: #ffd633;
}
.hero {
    position: relative;
    background: url("cd-cong-nghe-va-quan-tri-sonadezi4-17339701698181842662676.webp") center/cover no-repeat;
    height: 90vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;

}

.hero .overlay {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-color: rgba(0,0,0,0.5);
}

.hero .content {
    position: relative;
    color: white;
    z-index: 1;
    width: 80%;
}

.hero h1 {
    font-size: 40px;
    font-weight: bold;
    margin-bottom: 15px;
}

.hero p {
    font-size: 16px;
    margin-bottom: 30px;
}
.search-box {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.search-box select,
.search-box input {
    padding: 10px;
    width: 220px;
    border: none;
    border-radius: 5px;
}

.search-box button {
    background-color: #ffcc00;
    color: black;
    border: none;
    padding: 10px 20px;
    font-weight: bold;
    border-radius: 5px;
    cursor: pointer;
}

.search-box button:hover {
    background-color: #ffd633;
}
.features {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 40px;
    padding: 80px 100px;
    background-color: #fff;
    text-align: center;
}

.feature {
    width: 25%;
    color: #333;
}

.feature img {
    width: 80px;
    margin-bottom: 20px;
}

.feature h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
}

.feature p {
    font-size: 15px;
    line-height: 1.6;
    color: #555;
}

.divider {
    width: 1px;
    height: 120px;
    background-color: #ccc;
    align-self: center;
}
@media (max-width: 900px) {
    .features {
        flex-direction: column;
        align-items: center;
    }
    .divider {
        display: none;
    }
    .feature {
        width: 80%;
    }
}
.dropdown {
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #083d8c;
    min-width: 180px;
    border-radius: 4px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    z-index: 999;
}

.dropdown-menu li {
    width: 100%;
}

.dropdown-menu a {
    display: block;
    padding: 10px 15px;
    color: white;
    text-decoration: none;
    font-weight: 500;
}

.dropdown-menu a:hover {
    background-color: #0c55c3;
    color: #ffcc00;
}
.dropdown:hover .dropdown-menu {
    display: block;
}
.footer {
  font-family: Arial, sans-serif;
}
.footer-top {
  background-color: #f7c600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 30px 60px;
  flex-wrap: wrap;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 15px;
  font-size: 18px;
  color: #222;
  max-width: 500px;
}

.footer-left .player-img {
  height: 120px;
}

.footer-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.footer-form input {
  padding: 10px 15px;
  border: none;
  border-radius: 4px;
  width: 200px;
  font-size: 15px;
}

.footer-form button {
  background-color: #0b3c89;
  color: white;
  padding: 10px 20px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.footer-form button:hover {
  background-color: #002b6d;
}
.footer-bottom {
  background-color: #0b3c89;
  color: white;
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  padding: 40px 60px;
}

.footer-col {
  width: 30%;
  min-width: 280px;
  margin-bottom: 30px;
}

.footer-col h3 {
  margin-bottom: 15px;
  border-bottom: 1px solid rgba(255,255,255,0.3);
  padding-bottom: 10px;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col ul li {
  margin: 5px 0;
}
.contact-box {
  background-color: #113c7b;
  border-radius: 8px;
  padding: 15px 20px;
  text-align: center;
}

.contact-box span {
  display: block;
  font-size: 22px;
  color: #22b2f2;
  margin: 5px 0;
}

.contact-box button {
  background-color: #f7c600;
  color: #000;
  border: none;
  border-radius: 4px;
  padding: 8px 18px;
  cursor: pointer;
  transition: transform 0.2s;
}

.contact-box button:hover {
  transform: scale(1.05);
}
.footer-top {
  background-color: #ffc107;
  padding: 40px 20px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.footer-signup {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  width: 100%;
  gap: 15px;
}

.signup-text {
  flex: 1 1 350px;
  font-size: 20px;
  font-weight: bold;
  color: #1c1c1c;
}

.signup-form {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.signup-form input {
  padding: 10px;
  border-radius: 5px;
  border: none;
  min-width: 180px;
}

.signup-form button {
  background-color: #0b3c89;
  color: white;
  border: none;
  padding: 10px 25px;
  border-radius: 5px;
  font-weight: bold;
  cursor: pointer;
}

.signup-form button:hover {
  background-color: #072a61;
}
.footer-main {
  background-color: #0b3c89;
  color: white;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  padding: 40px 20px;
  gap: 20px;
}

.footer-column {
  flex: 1 1 300px;
  min-width: 280px;
}

.footer-column h4 {
  margin-bottom: 15px;
  font-size: 18px;
  border-bottom: 2px solid #ffc107;
  display: inline-block;
  padding-bottom: 5px;
}

.footer-column p,
.footer-column li {
  font-size: 15px;
  line-height: 1.6;
}

.footer-column ul {
  list-style: none;
  padding: 0;
}

.footer-column a {
  color: #ddd;
  text-decoration: none;
}

.footer-column a:hover {
  color: #ffc107;
}
.contact-box {
  background-color: rgba(255, 255, 255, 0.1);
  padding: 15px;
  border-radius: 8px;
  text-align: center;
}

.contact-box span {
  display: block;
  font-size: 20px;
  font-weight: bold;
  color: #00b3ff;
  margin: 10px 0;
}

.contact-box button {
  background-color: #ffc107;
  border: none;
  color: #0b3c89;
  padding: 8px 18px;
  font-weight: bold;
  border-radius: 5px;
  cursor: pointer;
}

.contact-box button:hover {
  background-color: #ffdb4d;
}
.footer-social {
  background-color: #082b63;
  text-align: center;
  padding: 20px 0;
}

.footer-social p {
  font-size: 16px;
  margin-bottom: 8px;
  font-weight: bold;
  letter-spacing: 1px;
}

.social-icons a {
  color: white;
  margin: 0 10px;
  font-size: 22px;
  transition: color 0.3s, transform 0.3s;
}

.social-icons a:hover {
  color: #ffc107;
  transform: scale(1.2);
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  scroll-behavior: smooth;
  font-family: "Segoe UI", sans-serif;
}