.lagu-section {
  background: radial-gradient(circle at center, #0b1f4d, #020617);
  padding: 100px 20px;
  color: white;
  position: relative;
  overflow: hidden;
}

.lagu-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(212, 175, 55, 0.12), transparent 60%);
  opacity: 0;
  transition: opacity 1.5s ease;
  pointer-events: none;
  z-index: 1;
}

.lagu-section.is-visible::before {
  opacity: 1;
}

.lagu-container {
  max-width: 960px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

/* HEADER */
.lagu-section-header {
  text-align: center;
  margin-bottom: 60px;
}

.lagu-section-subtitle {
  font-family: var(--font-display);
  font-size: 12px;
  color: var(--red-accent);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 14px;
  opacity: 0;
  transition: opacity 0.8s ease, letter-spacing 0.8s ease;
}

.reveal-section.is-visible .lagu-section-subtitle {
  opacity: 1;
  letter-spacing: 5px;
}

.lagu-main-title {
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 400;
  color: var(--white);
  margin: 0 0 14px;
  letter-spacing: 1px;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.9s ease 0.15s, transform 0.9s ease 0.15s;
}

.reveal-section.is-visible .lagu-main-title {
  opacity: 1;
  transform: translateY(0);
}

.lagu-quote {
  font-family: var(--font-body);
  font-size: 16px;
  font-style: italic;
  color: var(--gold-medium);
  margin: 0;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.7s ease 0.3s, transform 0.7s ease 0.3s;
}

.reveal-section.is-visible .lagu-quote {
  opacity: 1;
  transform: translateY(0);
}

/* CARD */
.lagu-card {
  background: rgba(18, 30, 61, 0.8);
  border-radius: 16px;
  margin-bottom: 40px;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(212, 175, 55, 0.15);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), border-color 0.4s ease, box-shadow 0.4s ease;
}

.reveal-card {
  opacity: 0;
  transform: translateY(48px) scale(0.98);
  filter: blur(8px);
  transition: opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1), transform 0.9s cubic-bezier(0.22, 1, 0.36, 1), filter 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-card.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  filter: blur(0);
}

.reveal-card:nth-of-type(2) {
  transition-delay: 0.3s;
}

.lagu-card:hover {
  transform: translateY(-6px);
  border-color: rgba(212, 175, 55, 0.45);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(212, 175, 55, 0.25);
}

.lagu-top-line {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--red-accent), #ff8c00, var(--gold));
  background-size: 200% auto;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.5s;
}

.reveal-card.is-visible .lagu-top-line {
  transform: scaleX(1);
}

.lagu-card:hover .lagu-top-line {
  animation: shimmerLine 2.5s linear infinite;
}

@keyframes shimmerLine {
  0% { background-position: 0% center; }
  100% { background-position: -200% center; }
}


.lagu-card-content {
  display: flex;
  padding: 28px;
  gap: 32px;
  align-items: center;
}

/* TASK 2 & 3: VIDEO EMBED — 16:9 responsive */
.lagu-video {
  position: relative;
  width: 45%;
  flex-shrink: 0;
  padding-top: 25.3%; /* 56.25% of 45% */
  border-radius: 12px;
  overflow: hidden;
  background: #000;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), border-color 0.4s ease, box-shadow 0.4s ease;
}

.lagu-card:hover .lagu-video {
  transform: scale(1.015);
  box-shadow: 0 15px 35px rgba(0,0,0,0.5);
}

/* TASK 4: Premium overlay (non-interactive) */
.lagu-video::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.15),
    rgba(0, 0, 0, 0.3)
  );
  pointer-events: none;
  border-radius: 12px;
  z-index: 1;
}

.lagu-video iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* RIGHT: DETAILS */
.lagu-details {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.lagu-details > * {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-card.is-visible .lagu-details > * {
  opacity: 1;
  transform: translateY(0);
}

.reveal-card.is-visible .lagu-details .lagu-header { transition-delay: 0.5s; }
.reveal-card.is-visible .lagu-details .lagu-desc { transition-delay: 0.65s; }
.reveal-card.is-visible .lagu-details .lagu-btn-youtube { transition-delay: 0.8s; }

.lagu-header {
  display: flex;
  align-items: center;
  gap: 14px;
}

.lagu-music-icon {
  width: 36px;
  height: 36px;
  background: rgba(255, 59, 59, 0.1);
  border: 1px solid rgba(255, 59, 59, 0.3);
  border-radius: 8px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-shrink: 0;
  color: var(--red-accent);
  animation: iconPulse 3.5s ease-in-out infinite;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes iconPulse {
  0%, 100% { transform: scale(1); box-shadow: 0 0 0 rgba(255, 59, 59, 0); }
  50% { transform: scale(1.05); box-shadow: 0 0 12px rgba(255, 59, 59, 0.4); }
}

.lagu-card:hover .lagu-music-icon {
  transform: rotate(4deg) scale(1.05);
}

.lagu-music-icon svg {
  width: 16px;
  height: 16px;
  stroke: var(--red-accent);
  stroke-width: 2;
}

.lagu-title-area {
  flex: 1;
}

.lagu-subtitle {
  font-family: var(--font-display);
  font-size: 10px;
  color: var(--gold);
  letter-spacing: 2.5px;
  margin-bottom: 5px;
  text-transform: uppercase;
}

.lagu-title {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--white);
  margin: 0;
  font-weight: 700;
  line-height: 1.3;
}

.lagu-desc {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--gold-medium);
  line-height: 1.7;
  margin: 0;
}

/* BUTTON YOUTUBE */
.lagu-btn-youtube {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 1.5px;
  color: var(--white);
  background: transparent;
  border: 1px solid rgba(255, 59, 59, 0.5);
  border-radius: 8px;
  padding: 10px 20px;
  text-decoration: none;
  transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
  width: fit-content;
}

.lagu-btn-youtube svg {
  width: 16px;
  height: 16px;
  stroke: var(--red-accent);
}

.lagu-btn-youtube:hover {
  background: rgba(255, 59, 59, 0.15);
  border-color: var(--red-accent);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(255, 59, 59, 0.2);
}


/* TASK 7: RESPONSIVE — mobile full width, 16:9 tetap */
@media (max-width: 768px) {
  .lagu-card-content {
    flex-direction: column;
    padding: 20px;
    gap: 24px;
  }

  .lagu-video {
    width: 100%;
    padding-top: 56.25%; /* Full 16:9 */
  }

  .lagu-main-title {
    font-size: 28px;
  }
}

/* ACCESSIBILITY */
@media (prefers-reduced-motion: reduce) {
  .reveal-card,
  .lagu-details > *,
  .lagu-top-line,
  .lagu-main-title,
  .lagu-section-subtitle,
  .lagu-quote,
  .lagu-music-icon {
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
    transition: none !important;
    animation: none !important;
  }
}