* { margin: 0; padding: 0; box-sizing: border-box; }
body { background: #0f172a; color: #f8fafc; font-family: 'Montserrat', sans-serif; line-height: 1.6; }
.container { width: 100%; max-width: 1080px; margin: 0 auto; padding: 20px; }
.header { text-align: center; margin-bottom: 30px; }
.header h1 { font-size: 48px; color: #38bdf8; }
.logo { width: 200px; margin: 0 auto 20px; display: block; }

.hero { height: 600px; background: linear-gradient(135deg, rgba(15,23,42,0.85), rgba(30,41,59,0.85)), url('https://source.unsplash.com/random/1080x1080/?space,galaxy') no-repeat center center/cover; display: flex; justify-content: center; align-items: center; text-align: center; padding: 0 40px; border-radius: 24px; }
.hero h1 { font-size: 60px; font-weight: 700; color: #f8fafc; text-shadow: 0 0 20px rgba(56,189,248,0.5); }
.hero p { max-width: 650px; margin: 20px auto; font-size: 18px; opacity: 0.85; }
.btn { display: inline-block; margin-top: 30px; padding: 15px 35px; background: #38bdf8; color: #0f172a; text-decoration: none; border-radius: 40px; font-weight: 700; }

.section { padding: 60px 0; text-align: center; }
.section h2 { font-size: 36px; margin-bottom: 50px; color: #ffffff; }
.cards { display: flex; flex-wrap: wrap; justify-content: center; gap: 30px; }

.card { background: #1e293b; padding: 40px 30px; border-radius: 20px; width: 300px; box-shadow: 0 15px 30px rgba(0,0,0,0.4);
        opacity: 0; transform: translateY(18px); transition: opacity .35s ease, transform .35s ease; }

.card iframe { width: 100%; height: 180px; border-radius: 10px; border: 0; }
.card p { margin-top: 15px; opacity: 0.8; }

.card-buttons { display: flex; justify-content: space-between; gap: 10px; margin-top: 20px; }
.btn-like { background: #38bdf8; color: #0f172a; padding: 10px 20px; border-radius: 40px; font-weight: 700; border: 0; cursor: pointer; flex:1; }
.btn-comment { background: #f8fafc; color: #0f172a; padding: 10px 20px; border-radius: 40px; font-weight: 700; border: 0; cursor: pointer; flex:1; }

.footer { padding: 50px 0; text-align: center; background: #0b1220; font-size: 14px; opacity: 0.9; border-radius: 18px; margin-top: 30px; }
.footer a { color: #38bdf8; margin: 0 10px; display: inline-block; }

@media (max-width: 768px) {
  .hero h1 { font-size: 36px; }
  .cards { flex-direction: column; align-items: center; }
  .card { width: 100%; }
  .hero { height: auto; padding: 60px 18px; }
}