.minh-niem-lessons-section {
  padding: 0 0 var(--space-7);
  background: #fff;
}

.minh-niem-lessons-scroll-section {
  --lesson-sticky-top: clamp(1.5rem, 7vh, 5rem);
  --lesson-shell-gap: clamp(var(--space-5), 5vw, var(--space-7));
  --lesson-marker-offset: clamp(var(--space-4), 4vw, var(--space-6));
}

.minh-niem-lessons-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  overflow: hidden;
  background: #fff;
}

.minh-niem-lessons-scroll-section .minh-niem-lessons-shell {
  gap: var(--lesson-shell-gap);
  align-items: start;
  overflow: visible;
}

.minh-niem-lessons-visual {
  position: relative;
  min-height: 44rem;
  padding: var(--space-6);
  background-color: var(--color-surface);
  background-image: url("../assets/minh-niem-1.jpeg");
  background-size: cover;
  background-position: center;
}

.minh-niem-lessons-scroll-section .minh-niem-lessons-visual {
  position: sticky;
  top: var(--lesson-sticky-top);
  min-height: calc(100vh - (var(--lesson-sticky-top) * 2));
  padding: 0;
  overflow: hidden;
}

.minh-niem-lessons-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.08)),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
  pointer-events: none;
}

.minh-niem-lessons-tabs {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  width: fit-content;
  margin-top: 20%;
}

.minh-niem-lessons-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 5.5rem;
  aspect-ratio: 1;
  padding-top: 10px;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.88);
  color: var(--color-text);
  cursor: pointer;
  transition:
    transform 180ms ease,
    background 180ms ease,
    color 180ms ease;
}

.minh-niem-lessons-tab:hover,
.minh-niem-lessons-tab:focus-visible {
  transform: translateY(-1px);
  outline: none;
}

.minh-niem-lessons-tab.is-active {
  background: var(--color-accent);
  color: #fff;
}

.minh-niem-lessons-copy {
  position: relative;
  display: grid;
  min-height: 44rem;
  background: #fff;
}

.minh-niem-lessons-section:not(.minh-niem-lessons-scroll-section) .minh-niem-lessons-panel {
  display: none;
  gap: var(--space-5);
  align-content: start;
}

.minh-niem-lessons-section:not(.minh-niem-lessons-scroll-section)
  .minh-niem-lessons-panel.is-active {
  display: grid;
}

.minh-niem-lessons-scroll-track {
  display: grid;
  gap: 0;
  padding: min(42vh, 23rem) 0 min(38vh, 20rem);
}

.minh-niem-lessons-step {
  display: grid;
  overflow: visible;
  opacity: 0.22;
  transform: translateY(3.5rem);
  transition:
    opacity 520ms ease,
    transform 520ms ease;
}

.minh-niem-lessons-step:not(:last-child) {
  padding-bottom: 34vh;
}

.minh-niem-lessons-step.is-active {
  opacity: 1;
  transform: translateY(0);
}

.minh-niem-lessons-step-marker,
.minh-niem-lessons-scroll-section .minh-niem-lessons-panel {
  grid-area: 1 / 1;
}

.minh-niem-lessons-step-marker {
  position: sticky;
  top: calc(var(--lesson-sticky-top) + var(--space-4));
  justify-self: start;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 5.5rem;
  aspect-ratio: 1;
  margin-left: calc(-100% - var(--lesson-shell-gap) + var(--lesson-marker-offset));
  border: 1px solid var(--color-line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--color-text);
  box-shadow: 0 1rem 2.5rem rgba(35, 27, 22, 0.12);
  z-index: 1;
  pointer-events: none;
  transition:
    background 320ms ease,
    color 320ms ease,
    transform 320ms ease,
    box-shadow 320ms ease;
}

.minh-niem-lessons-step.is-active .minh-niem-lessons-step-marker {
  background: var(--color-accent);
  color: #fff;
  transform: scale(1.04);
  z-index: 3;
  box-shadow: 0 1.2rem 3rem rgba(35, 27, 22, 0.18);
}

.minh-niem-lessons-scroll-section .minh-niem-lessons-panel {
  display: grid;
  gap: var(--space-5);
  align-content: start;
  padding: clamp(var(--space-4), 4vw, var(--space-6)) 0;
  position: relative;
  z-index: 2;
}

.minh-niem-lessons-tab-label {
  font-size: var(--fs-body);
  font-weight: 500;
  line-height: 1;
}

.minh-niem-lessons-tab-number {
  font-size: 30px;
  line-height: 0.9;
  font-weight: 600;
}

.minh-niem-lessons-title {
  margin: 0;
  color: var(--color-text);
  font-size: 30px;
  line-height: 1.4;
  font-weight: 700;
}

.minh-niem-lessons-divider {
  display: none;
}

.minh-niem-lessons-panel p {
  margin: 0;
  color: var(--color-text);
  font-size: var(--fs-body);
  line-height: 1.6;
}

.minh-niem-lessons-lead {
  padding-left: var(--space-4);
  border-left: 0.35rem solid var(--color-accent);
}

.three-circles {
  --tc-progress: 0;
  position: relative;
  min-height: clamp(18rem, 36vw, 22rem);
  isolation: isolate;
}

.three-circles svg {
  display: block;
  width: 100%;
  max-width: 32.5rem;
  margin: 0 auto;
  overflow: visible;
}

.tc-circle {
  fill: rgba(255, 255, 255, 0.92);
  stroke-width: 3.5;
  opacity: calc(0.4 + (0.5 * var(--tc-progress)));
  transition:
    transform 180ms linear,
    opacity 180ms linear;
}

.tc-nature {
  stroke: #7a9f43;
  transform: translate(
    calc(-83.6px * (1 - var(--tc-progress))),
    calc(-22px * (1 - var(--tc-progress)))
  );
}

.tc-self {
  stroke: #c86a42;
  transform: translate(
    calc(83.6px * (1 - var(--tc-progress))),
    calc(-22px * (1 - var(--tc-progress)))
  );
}

.tc-community {
  stroke: #4f7fa8;
  transform: translate(0, calc(88px * (1 - var(--tc-progress))));
}

.tc-labels {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tc-label {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  width: clamp(8rem, 17vw, 10rem);
  min-height: clamp(8rem, 17vw, 10rem);
  color: var(--color-text);
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  font-weight: 600;
  line-height: 1.25;
  text-align: center;
  filter: blur(calc(6px * (1 - var(--tc-progress))));
  opacity: calc(0.4 + (0.6 * var(--tc-progress)));
  transition:
    transform 180ms linear,
    filter 180ms linear,
    opacity 180ms linear;
}

.tc-label--nature {
  top: 0;
  left: 10%;
  transform: translate(
    calc(-20px * (1 - var(--tc-progress))),
    calc(-8px * (1 - var(--tc-progress)))
  );
}

.tc-label--self {
  top: 0;
  right: 10%;
  transform: translate(
    calc(20px * (1 - var(--tc-progress))),
    calc(-8px * (1 - var(--tc-progress)))
  );
}

.tc-label--community {
  left: 50%;
  bottom: 0;
  transform: translate(-50%, calc(24px * (1 - var(--tc-progress))));
}

@media (max-width: 1024px) {
  .minh-niem-lessons-shell {
    grid-template-columns: 1fr;
  }

  .minh-niem-lessons-visual,
  .minh-niem-lessons-copy {
    min-height: auto;
  }

  .minh-niem-lessons-tabs {
    flex-direction: row;
    flex-wrap: wrap;
    margin-top: 0;
  }

  .minh-niem-lessons-scroll-section .minh-niem-lessons-shell {
    gap: var(--space-5);
  }

  .minh-niem-lessons-scroll-section .minh-niem-lessons-visual {
    position: relative;
    top: auto;
    min-height: 70vh;
  }

  .minh-niem-lessons-scroll-track {
    gap: 0;
    padding: var(--space-6) 0 0;
  }

  .minh-niem-lessons-step:not(:last-child) {
    padding-bottom: var(--space-6);
  }

  .minh-niem-lessons-step,
  .minh-niem-lessons-step.is-active {
    grid-template-columns: 5.5rem minmax(0, 1fr);
    gap: var(--space-5);
    opacity: 1;
    transform: none;
  }

  .minh-niem-lessons-step-marker,
  .minh-niem-lessons-scroll-section .minh-niem-lessons-panel {
    grid-area: auto;
  }

  .minh-niem-lessons-step-marker {
    margin-left: 0;
    top: var(--space-4);
  }

  .three-circles {
    min-height: 19rem;
  }
}

@media (max-width: 720px) {
  .minh-niem-lessons-section {
    padding-bottom: var(--space-6);
  }

  .minh-niem-lessons-visual {
    padding: var(--space-4);
  }

  .minh-niem-lessons-tab {
    width: 5.5rem;
  }

  .minh-niem-lessons-scroll-section .minh-niem-lessons-visual {
    min-height: 28rem;
    padding: 0;
  }

  .minh-niem-lessons-step {
    grid-template-columns: 4.75rem minmax(0, 1fr);
    gap: var(--space-4);
  }

  .minh-niem-lessons-step-marker {
    width: 4.75rem;
  }

  .three-circles {
    min-height: 16rem;
    margin: var(--space-5) 0;
  }

  .three-circles svg {
    max-width: none;
  }

  .tc-label {
    width: min(7.6rem, 32vw);
    min-height: min(7.6rem, 32vw);
    font-size: 0.94rem;
  }

  .tc-label--nature {
    left: 1%;
  }

  .tc-label--self {
    right: 1%;
  }

  .tc-label--community {
    transform: translate(-50%, calc(18px * (1 - var(--tc-progress))));
  }

  .minh-niem-lessons-tab-number {
    font-size: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .minh-niem-lessons-step,
  .minh-niem-lessons-step-marker {
    transition: none;
  }
}