@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;700&display=swap');

body {
  font-family: 'Inter', Arial, sans-serif;
  background: #f3f6fb;
  color: #20253a;
  margin: 0;
  padding: 0;
}

.header {
  background: linear-gradient(90deg, #225bdd 0%, #15d4b7 100%);
  color: #fff;
  padding: 2rem 0 1.4rem 0;
  text-align: center;
  box-shadow: 0 2px 18px #225bdd23;
  margin-bottom: 24px;
}
.header h1 {
  letter-spacing: 2px;
  font-size: 2.2rem;
  margin: 0;
  font-weight: 700;
}
.header .subtitle {
  font-weight: 400;
  letter-spacing: 1px;
  color: #e7f5fa;
  margin-top: 8px;
}

.container {
  max-width: 660px;
  margin: 0 auto;
  padding: 24px 20px 0 20px;
}

.card-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.card {
  display: flex;
  align-items: center;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 16px #cfd8eb23;
  padding: 18px 20px;
  transition: transform 0.14s cubic-bezier(.4,.2,.2,1), box-shadow 0.2s;
}
.card:hover {
  transform: translateY(-4px) scale(1.018);
  box-shadow: 0 8px 24px #225bdd39;
}

.folder-icon, .video-icon {
  font-size: 2.4rem;
  margin-right: 24px;
  color: #225bdd;
  flex-shrink: 0;
}

.video-title {
  font-size: 1.17rem;
  font-weight: 600;
  letter-spacing: 0.4px;
  color: #20253a;
  text-decoration: none;
  transition: color 0.16s;
}

.card a.video-title:hover {
  color: #15d4b7;
  text-decoration: underline;
}

@media (max-width: 600px) {
  .container {
    padding: 8px 5vw 0 5vw;
  }
  .card {
    padding: 12px 10px;
  }
  .header h1 {
    font-size: 1.42rem;
  }
}