@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&family=Montserrat:wght@500;700&display=swap');

* { box-sizing: border-box; }

body {
  background: radial-gradient(1200px 600px at 10% 10%, rgba(255,110,196,0.06), transparent),
              linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%);
  font-family: 'Poppins', sans-serif;
  color: #f5f7fa;
  margin: 0;
  padding: 28px;
  -webkit-font-smoothing: antialiased;
}


h1 {
  font-family: 'Montserrat', sans-serif;
  font-size: 2.8rem;
  text-align: center;
  margin: 0 0 8px;
  background: linear-gradient(90deg, #ff6ec4, #7873f5 60%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: pulse 2.2s infinite alternate;
  font-weight: 800;
  letter-spacing: 0.4px;
}
@keyframes pulse { from { transform: scale(1); } to { transform: scale(1.06); } }

#attention {
  text-align: center;
  margin: 12px auto 20px;
  display: inline-block;
  padding: 10px 16px;
  background: rgba(255,255,255,0.03);
  border-radius: 12px;
  color: #00f7ff;
  font-weight: 600;
  box-shadow: 0 6px 18px rgba(0, 247, 255, 0.04);
  animation: blink 1.4s infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.45} }

/* Select */
select {
  display:block;
  margin: 18px auto;
  padding: 12px 18px;
  font-size: 1rem;
  border-radius: 12px;
  border: 2px solid rgba(0,247,255,0.9);
  background: rgba(255,255,255,0.02);
  color: #e9fbff;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease;
}
select:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(0,247,255,0.06); }


.video-list {
  max-width: 980px;
  margin: 22px auto;
  display: none;
  padding: 22px;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  backdrop-filter: blur(8px);
  box-shadow: 0 12px 40px rgba(3, 11, 24, 0.6);
  border: 1px solid rgba(255,255,255,0.03);
}


.video-link {
  display:block;
  margin: 10px 6px;
  padding: 12px 14px;
  font-size: 1.02rem;
  color: #ffd6f0;
  text-decoration: none;
  border-radius: 10px;
  transition: transform .18s ease, box-shadow .18s ease, color .18s ease;
  background: linear-gradient(90deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border-left: 4px solid transparent;
}
.video-link:hover {
  transform: translateX(8px);
  color: #fff;
  box-shadow: 0 10px 30px rgba(120,115,245,0.08), 0 0 12px rgba(0,247,255,0.06);
  border-left-color: rgba(255,110,196,0.9);
}


h3 {
  margin-top: 24px;
  margin-bottom: 6px;
  color: #aeefff;
  font-weight: 700;
  font-size: 1.15rem;
  text-shadow: 0 4px 18px rgba(0,247,255,0.04);
}


.accordion { margin: 14px 0 18px; }
.accordion-btn {
  width:100%;
  padding: 12px 14px;
  background: linear-gradient(90deg, rgba(0,0,0,0.35), rgba(255,255,255,0.02));
  border: 1px solid rgba(0,247,255,0.14);
  color: #eaffff;
  font-weight: 700;
  font-size: 1.02rem;
  border-radius: 10px;
  cursor: pointer;
  display:flex;
  justify-content: space-between;
  align-items: center;
  transition: transform .16s ease, box-shadow .16s ease, background .2s ease;
}
.accordion-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(0,247,255,0.05), inset 0 0 18px rgba(120,115,245,0.02);
  background: linear-gradient(90deg, rgba(0,247,255,0.03), rgba(255,110,196,0.02));
}

.plus {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ff9bd3;
  margin-left: 12px;
}


.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height .42s cubic-bezier(.2,.8,.2,1);
  margin-top: 10px;
  padding-left: 8px;
}
.accordion-content .video-link {
  margin-left: 6px;
  background: rgba(255,255,255,0.015);
  color: #ffdff4;
  padding-left: 18px;
}


.back-link {
  display:inline-block;
  margin: 28px auto;
  padding: 10px 18px;
  color: #00f7ff;
  background: rgba(255,255,255,0.02);
  border-radius: 12px;
  text-decoration:none;
  border: 1px solid rgba(0,247,255,0.12);
  transition: transform .16s ease, box-shadow .16s ease;
}
.back-link:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px rgba(0,247,255,0.05);
  color: #021022;
  background: linear-gradient(90deg,#00f7ff,#ff6ec4);
}