/* assets/styles/pages/learn/learn-note-duration.css */
/* Lesson 10: connecting note name and rhythmic duration. */

.learn-note-duration-card {
  direction: rtl;
  width: min(100%, 660px);
  margin: 22px auto;
  padding: 22px 18px;
  border-radius: 28px;
  border: 1px solid rgba(255,224,138,.25);
  background:
    radial-gradient(circle at 18% 12%, rgba(255,224,138,.11), transparent 14rem),
    linear-gradient(135deg, rgba(255,224,138,.06), transparent 48%),
    rgba(9,9,11,.30);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.06), 0 18px 42px rgba(0,0,0,.20);
}

.learn-note-duration-title {
  margin: 0 0 16px;
  color: rgba(255,255,255,.84);
  font-size: 1rem;
  font-weight: 900;
  line-height: 1.7;
  text-align: center;
}

.learn-note-duration-visual {
  direction: ltr;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  min-height: 170px;
}

.learn-note-duration-staff {
  position: relative;
  min-height: 128px;
  border-radius: 22px;
  border: 1px solid rgba(255,224,138,.18);
  background:
    linear-gradient(to bottom,
      transparent 20%, rgba(255,224,138,.58) 20%, rgba(255,224,138,.58) calc(20% + 2px), transparent calc(20% + 2px),
      transparent 35%, rgba(255,224,138,.58) 35%, rgba(255,224,138,.58) calc(35% + 2px), transparent calc(35% + 2px),
      transparent 50%, rgba(255,224,138,.58) 50%, rgba(255,224,138,.58) calc(50% + 2px), transparent calc(50% + 2px),
      transparent 65%, rgba(255,224,138,.58) 65%, rgba(255,224,138,.58) calc(65% + 2px), transparent calc(65% + 2px),
      transparent 80%, rgba(255,224,138,.58) 80%, rgba(255,224,138,.58) calc(80% + 2px), transparent calc(80% + 2px)),
    rgba(255,255,255,.025);
  overflow: hidden;
}

.learn-note-duration-note {
  position: absolute;
  left: 52%;
  top: 65%;
  width: 40px;
  height: 28px;
  border-radius: 50%;
  background: #fff3bd;
  box-shadow: 0 0 20px rgba(255,224,138,.30);
  transform: translate(-50%, -50%) rotate(-12deg);
}

.learn-note-duration-note::after {
  content: '';
  position: absolute;
  right: 3px;
  top: -58px;
  width: 5px;
  height: 62px;
  border-radius: 999px;
  background: #fff3bd;
  box-shadow: 0 0 12px rgba(255,224,138,.18);
  transform: rotate(12deg);
  transform-origin: bottom center;
}

.learn-note-duration-plus {
  direction: rtl;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid rgba(255,224,138,.35);
  color: #fff3bd;
  background: rgba(255,224,138,.08);
  font-size: 1.5rem;
  font-weight: 900;
}

.learn-note-duration-info {
  direction: rtl;
  display: grid;
  gap: 10px;
}

.learn-note-duration-pill {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.09);
  background: rgba(255,255,255,.045);
}

.learn-note-duration-pill strong {
  color: #fff3bd;
  font-size: 1.08rem;
  font-weight: 900;
}

.learn-note-duration-pill span {
  color: rgba(255,255,255,.72);
  font-size: .94rem;
  line-height: 1.55;
}

.learn-note-duration-result {
  margin: 16px 0 0;
  padding: 12px 14px;
  border-radius: 18px;
  border: 1px solid rgba(126,207,160,.25);
  background: rgba(126,207,160,.09);
  color: rgba(255,255,255,.82);
  font-weight: 800;
  line-height: 1.7;
  text-align: center;
}

.learn-note-duration-options {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

@media (max-width: 680px) {
  .learn-note-duration-card {
    margin: 20px -4px;
    padding: 18px 12px;
    border-radius: 22px;
  }

  .learn-note-duration-visual {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .learn-note-duration-staff {
    min-height: 118px;
  }

  .learn-note-duration-plus {
    margin: 0 auto;
    width: 36px;
    height: 36px;
    font-size: 1.25rem;
  }

  .learn-note-duration-note {
    width: 34px;
    height: 24px;
  }

  .learn-note-duration-note::after {
    top: -50px;
    height: 54px;
    width: 4px;
  }
}