* {margin:0; padding:0; box-sizing:border-box; font-family: 'Segoe UI', sans-serif;}
body {background:#f9fafb; color:#333; line-height:1.6;}
html, body {height:100%;}
.page-bg { 
  background-image:url("Background.jpg");
  background-size:cover;
  background-position:center center;
  background-repeat:no-repeat;
  background-attachment:fixed;
  min-height:100vh;
}

header {
  background:#1e3a8a;
  color:#fff;
  padding:15px 50px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  position:fixed;
  top:0; z-index:1000;
  left:0; right:0;
}
.logo {
  display:flex;
  align-items:center;
  gap:12px;
}
.logo img {
  height:60px;
}
.logo span {
  font-size:1.4rem;
  font-weight:bold;
  color:#fff;
  letter-spacing:1px;
}
header img {height:50px;}
nav a {
  color:#fff;
  margin-left:20px;
  text-decoration:none;
  font-weight:500;
}
nav a:hover {color:#3b82f6;}

section {padding:80px 50px; max-width:1200px; margin:auto;}
body {padding-top:80px;}
.hero {
  display:flex;
  flex-direction:column;
  align-items:center;
  text-align:center;
  gap:20px;
}
#gioi-thieu { color:#fff; }
#gioi-thieu h2 { color:#fff; }
.hero h1 {font-size:2.5rem; color:#1e3a8a;}
.hero p {font-size:1.2rem; color:#555;}
.btn {
  display:inline-block;
  padding:12px 25px;
  margin-top:20px;
  background:#3b82f6;
  color:#fff;
  border-radius:8px;
  text-decoration:none;
  font-weight:bold;
  transition:0.3s;
}
.btn:hover {background:#2563eb;}

.features {
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
  gap:30px;
  margin-top:40px;
}
.feature {
  background:#fff;
  border-radius:10px;
  box-shadow:0 4px 10px rgba(0,0,0,0.05);
  padding:20px;
  text-align:center;
  transition:transform 0.3s;
}
.feature:hover {transform:translateY(-5px);}
.feature h3 {color:#1e3a8a; margin-bottom:10px;}

.demo {
  text-align:center;
}
.demo-link {
  text-decoration:none;
  color:inherit;
  display:block;
  margin:20px auto;
  max-width:800px;
}
.demo-link h3 {
  color:#1e3a8a;
  margin-bottom:15px;
  font-size:1.5rem;
  text-align:center;
}
.demo img {
  max-width:100%;
  height:auto;
  border-radius:10px;
  display:block;
  margin:0 auto;
}

.contact form {
  display:grid;
  gap:15px;
  max-width:500px;
  margin:auto;
}
.contact input, .contact textarea {
  padding:12px;
  border:1px solid #ccc;
  border-radius:8px;
  font-size:1rem;
}
.contact button {
  padding:12px;
  border:none;
  background:#1e3a8a;
  color:#fff;
  border-radius:8px;
  cursor:pointer;
  font-weight:bold;
}
.contact button:hover {background:#3b82f6;}

footer {
  background:#1e3a8a;
  color:#fff;
  text-align:center;
  padding:20px;
  margin-top:50px;
}

.messenger-button {
  position:fixed;
  right:20px;
  bottom:20px;
  width:56px;
  height:56px;
  background:#0084ff;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 8px 20px rgba(0,0,0,0.2);
  transition:transform .2s ease, box-shadow .2s ease;
}
.messenger-button:hover { 
  transform:translateY(-2px); 
  box-shadow:0 12px 24px rgba(0,0,0,0.25);
}
.messenger-button svg { 
  width:28px; 
  height:28px; 
  fill:#fff;
}

#why-vr360 {
  padding:80px 50px; 
  background:#f9fafb; 
  text-align:center;
}
#why-vr360 h2 {
  font-size:2rem; 
  color:#111; 
  margin-bottom:15px;
}
#why-vr360 p {
  max-width:700px; 
  margin:auto; 
  color:#555; 
  font-size:1.1rem; 
  margin-bottom:50px;
}

.features-grid {
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:30px;
}
.feature-box {
  background:#fff;
  padding:30px 20px;
  border-radius:12px;
  box-shadow:0 4px 15px rgba(0,0,0,0.05);
  transition:transform 0.3s;
}
.feature-box:hover {
  transform:translateY(-5px);
}
.feature-box .icon {
  font-size:2rem;
  margin-bottom:15px;
  color:#1e3a8a;
}
.feature-box h3 {
  margin-bottom:10px;
  color:#111;
}
.feature-box p {
  color:#555;
  font-size:0.95rem;
}

#lien-he {
  padding:80px 50px; 
  background:#f9fafb;
}
#lien-he h2 {
  text-align:center; 
  font-size:2rem; 
  margin-bottom:40px;
}

.contact-container {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  max-width:1000px;
  margin:auto;
}

.contact-info {
  display:flex;
  flex-direction:column;
  gap:20px;
}
.contact-card {
  display:flex;
  gap:15px;
  background:#fff;
  padding:20px;
  border-radius:12px;
  box-shadow:0 4px 12px rgba(0,0,0,0.05);
  align-items:center;
}
.contact-card .icon {
  font-size:2rem;
  background:#e0e7ff;
  padding:15px;
  border-radius:12px;
  color:#1e3a8a;
}
.contact-card h3 {
  margin:0;
  font-size:1.1rem;
  color:#111;
}
.contact-card p {
  margin:5px 0;
  color:#555;
}
.contact-card a {
  color:#3b82f6;
  text-decoration:none;
  font-weight:500;
}

.contact-form form {
  display:flex;
  flex-direction:column;
  gap:15px;
}
.contact-form input,
.contact-form textarea {
  width:100%;
  padding:12px 15px;
  border:1px solid #ddd;
  border-radius:8px;
  font-size:1rem;
}
.contact-form button {
  padding:14px;
  border:none;
  background:#1e3a8a;
  color:#fff;
  font-size:1rem;
  font-weight:600;
  border-radius:8px;
  cursor:pointer;
  transition:0.3s;
}
.contact-form button:hover {
  background:#3b82f6;
}

@media(max-width:768px) {
  .contact-container {
    grid-template-columns:1fr;
  }
}
/* Pricing Section */
#pricing {
  padding: 80px 20px;
  background: #f7fafc;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}

#pricing .container {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

#pricing h2 {
  font-size: 2.2rem;
  color: #0f172a;
  margin-bottom: 10px;
}

#pricing .intro {
  color: #475569;
  max-width: 800px;
  margin: 0 auto 40px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: #fff;
  border-radius: 14px;
  padding: 28px;
  box-shadow: 0 10px 30px rgba(2, 6, 23, 0.06);
  position: relative;
  overflow: hidden;
  text-align: left;
}

.card.popular {
  background: linear-gradient(180deg, #fff 0%, #fbfdff 100%);
  box-shadow: 0 18px 40px rgba(2, 6, 23, 0.12);
  transform: translateY(-6px);
}

.card .badge {
  position: absolute;
  top: 18px;
  right: 18px;
  background: #ffedd5;
  color: #b45309;
  padding: 6px 10px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.8rem;
}

.card-header h3 {
  margin: 0;
  font-size: 1.125rem;
  color: #0f172a;
}

.card-header .subtitle {
  color: #64748b;
  font-size: 0.9rem;
  margin-top: 6px;
}

.features {
  list-style: none;
  padding: 0;
  margin: 20px 0 22px;
  color: #334155;
  line-height: 1.7;
}

.features li {
  font-size: 0.95rem;
}

.btn {
  display: inline-block;
  text-decoration: none;
  padding: 12px 18px;
  background: #1e3a8a;
  color: #fff;
  border-radius: 10px;
  font-weight: 600;
  transition: transform .16s ease, box-shadow .16s ease;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.08);
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.12);
}

/* Responsive */
@media (max-width: 960px) {
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .card.popular {
    transform: none;
  }
}