@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@500;700&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Orbitron', sans-serif;
  background-color: #0f0f0f;
  color: #fff;
  scroll-behavior: smooth;
}

a {
  text-decoration: none;
  color: inherit;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(10px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 40px;
  z-index: 1000;
  transition: all 0.3s ease;
}

.header.shrink {
  height: 60px;
  background-color: rgba(0, 0, 0, 0.7);
}

.logo {
  height: 70px;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 30px;
}

.nav-links li a {
  font-weight: bold;
  font-size: 14px;
  color: #ffe066;
  position: relative;
  text-transform: uppercase;
}

.nav-links li a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: #ffe066;
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.nav-links li a:hover::after {
  width: 100%;
}

.hero {
  background: url('./images/s2.png') center/cover no-repeat;
  height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero .overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
}

.hero-content {
  position: relative;
  z-index: 1;
  bottom: -230px;
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.hero h1 span {
  color: #ffe066;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  color: #ccc;
}

.btn {
  padding: 0.8rem 2rem;
  background: #ccaf39;
  border-radius: 5px;
  font-weight: 600;
  font-size: 1rem;
  color: #fff;
  position: relative;
  overflow: hidden;
  transition: 0.3s;
  z-index: 1;
}

.btn:hover {
  background: rgb(95, 95, 9);
}

/* Ripple effect */
.btn::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: 0.6s ease;
  z-index: 0;
}

.btn:active::before {
  width: 200%;
  height: 200%;
}

/* Sections */
.features-section {
  background-color: #121212;
  padding: 6rem 1rem;
  color: #fff;
}

.features-flex {
  display: flex;
  flex-wrap: wrap;
  gap: 4rem;
  align-items: center;
  justify-content: center;
}

.features-image {
  flex: 1 1 400px;
  text-align: center;
}

.features-image img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 10px 20px rgba(0,0,0,0.4);
}

.features-content {
  flex: 1 1 400px;
}

.features-content h2 {
  font-size: 2.2rem;
  margin-bottom: 2rem;
  color: #ffe066;
  position: relative;
}

.features-content h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background-color: #ffe066;
  margin-top: 10px;
  border-radius: 4px;
}

.features-list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 1.5rem;
}

.features-list li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background-color: #1f1f1f;
  padding: 1.2rem;
  border-radius: 10px;
  transition: 0.3s ease;
  border-left: 4px solid #ffe066;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.features-list li:hover {
  transform: translateX(6px);
  background-color: #2a2a2a;
}

.features-list li span {
  font-size: 1.8rem;
  color: #ffe066;
}

.features-list li p {
  font-size: 1rem;
  color: #eee;
  line-height: 1.5;
}



footer {
  background-color: #000;
  text-align: center;
  padding: 2rem 1rem;
  color: #ffe066;
}

/* Animation */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 1s forwards;
}

.fade-in.delay-1 {
  animation-delay: 0.5s;
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.6s ease;
}

.reveal.show {
  opacity: 1;
  transform: translateY(0);
}

.feature-card img {
    width: 345px;
    height: 300px;
    object-fit: contain;
    margin-bottom: 1rem;
}

/* RESPONSIVE HEADER */

.menu-toggle {
  display: none;
  font-size: 2rem;
  color: #ffe066;
  cursor: pointer;
}

@media (max-width: 768px) {
  .header {
    padding: 0 20px;
  }

  .logo {
    height: 70px;
  }

.nav-links {
  position: absolute;
  top: 70px;
  right: 0;
  background-color: rgba(15, 15, 15, 0.95);
  flex-direction: column;
  align-items: flex-start;
  padding: 20px;
  width: 100%;
  display: none; /* Ẩn hẳn khi chưa mở */
}

.nav-links.open {
  display: flex;  /* Chỉ hiện khi mở menu */
}


  .nav-links li {
    width: 100%;
    padding: 10px 0;
  }

  .nav-links li a {
    font-size: 16px;
    color: #ffe066;
  }

  .menu-toggle {
    display: block;
  }
}


.material-symbols-outlined {
  font-variation-settings:
    'FILL' 0,
    'wght' 400,
    'GRAD' 0,
    'opsz' 48;
  font-size: 24px;
  line-height: 1;
}

@media (max-width: 768px) {
  .hero-content {
    bottom: -200px; /* nhẹ hơn trên mobile */
    padding: 0 1rem;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .btn {
    font-size: 0.9rem;
    padding: 0.6rem 1.5rem;
  }
}

@media (max-width: 992px) {
  .features-flex {
    flex-direction: column;
  }

  .features-content,
  .features-image {
    flex: 1 1 100%;
    text-align: center;
  }

  .features-image iframe {
    width: 100%;
    height: auto;
    max-height: 300px;
  }
}

.team-section {
  background-color: #000;
  color: #fff;
  text-align: center;
  padding: 4rem 2rem;
}

.team-title {
  font-size: 3rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
  color: #ffe066;
}

.team-subtitle {
  font-size: 1rem;
  color: #ccc;
  margin-bottom: 3rem;
}

.team-members {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
}

.member-card {
  background-color: #1a1a1a;
  padding: 2rem 1rem;
  border-radius: 8px;
  width: 220px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
}

.member-card img {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1rem;
}

.member-card h3 {
  font-size: 1.2rem;
  color: #ffe066;
  margin-bottom: 0.5rem;
}

.member-card .username {
  color: #ccc;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.member-card .role {
  color: red;
  font-style: italic;
  font-size: 0.9rem;
}

.member-card .role1 {
  color: rgb(21, 158, 221);
  font-style: italic;
  font-size: 0.9rem;
}

.member-card .role3 {
  color: rgb(151, 11, 233);
  font-style: italic;
  font-size: 0.9rem;
}
.member-card {
  background-color: #1a1a1a;
  padding: 2rem 1rem;
  border-radius: 8px;
  width: 220px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.member-card:hover {
  transform: translateY(-10px) scale(1.03);
  box-shadow: 0 8px 20px rgba(255, 224, 102, 0.4);
  background-color: #222;
}

.member-card img {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1rem;
  transition: transform 0.3s ease;
}

.member-card:hover img {
  transform: scale(1.05) rotate(1deg);
}