/* ── CONCEPT TABS ── */
.concept-tab-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0;
  padding: 100px 0 60px;
}

.concept-tab-separator {
  color: rgba(255, 255, 255, 0.18);
  font-size: 18px;
  padding: 0 28px;
  pointer-events: none;
  user-select: none;
  margin-bottom: 6px;
}

.concept-tab {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.42);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  cursor: pointer;
  padding: 0 0 8px 0;
  position: relative;
  transition: color 0.3s ease;
}

.concept-tab::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 1px;
  background-color: rgba(255, 255, 255, 0.65);
  transition: width 0.3s ease, left 0.3s ease;
}

.concept-tab.active {
  color: rgba(255, 255, 255, 0.88);
}

.concept-tab.active::after {
  width: 100%;
  left: 0;
}

.concept-tab:hover {
  color: rgba(255, 255, 255, 0.7);
}

.concept-tab:hover::after {
  width: 100%;
  left: 0;
}

/* ── SECTIONS ── */
.concept-section {
  display: none;
}

.concept-section.visible {
  display: block;
}

/* ── CONTENT ── */
.page-content {
  padding: 0 60px 80px;
  max-width: 1100px;
  margin: 0 auto;
}

h1 {
  font-family: var(--font-body);
  font-size: 28px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.38em;
  text-transform: uppercase;
  text-align: center;
  margin: 0 0 80px 0;
  position: relative;
  padding-bottom: 14px;
}

h1::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 1px;
  background-color: rgba(255, 255, 255, 0.4);
}

/* ── IMAGE SECTIONS ── */
.image-section {
  display: flex;
  align-items: center;
  gap: 60px;
  margin-bottom: 100px;
}

.image-section--reversed {
  flex-direction: row-reverse;
}

.section-image {
  flex: 0 0 40%;
  width: 40%;
  height: auto;
  object-fit: contain;
  border-radius: 6px;
  filter: brightness(0.88);
}

.section-image-clip {
  flex: 0 0 40%;
  width: 40%;
  overflow: hidden;
  border-radius: 6px;
}

.section-image-clip img {
  width: 100%;
  display: block;
  margin-top: -18px;
  filter: brightness(0.88);
}


.section-text {
  flex: 1;
}

.section-text h2 {
  font-family: var(--font-body);
  font-size: 34px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.88);
  letter-spacing: 0.04em;
  margin: 0 0 20px 0;
  position: relative;
  padding-bottom: 14px;
}

.section-text h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 1px;
  background-color: rgba(255, 255, 255, 0.4);
}

.section-text p {
  font-family: var(--font-body);
  font-size: 19px;
  font-weight: 300;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.62);
  margin: 0;
}

.calendar-link {
  color: rgba(255, 255, 255, 0.88);
  text-decoration: underline;
  text-decoration-color: rgba(255, 255, 255, 0.35);
  text-underline-offset: 3px;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

.calendar-link:hover {
  color: #ffffff;
  text-decoration-color: rgba(255, 255, 255, 0.7);
}

/* ── RESPONSIVE: TABLET (≤1024px) ── */
@media (max-width: 1024px) {
  .page-content {
    padding: 0 40px 60px;
  }

  .concept-tab {
    font-size: 15px;
    letter-spacing: 0.26em;
  }

  .image-section {
    gap: 40px;
  }

  .section-text h2 {
    font-size: 28px;
  }

  .section-text p {
    font-size: 17px;
  }
}

/* ── RESPONSIVE: MOBILE (≤768px) ── */
@media (max-width: 768px) {
  .concept-tab-row {
    padding: 90px 0 40px;
    gap: 0;
  }

  .concept-tab-separator {
    padding: 0 16px;
    font-size: 14px;
  }

  .concept-tab {
    font-size: 13px;
    letter-spacing: 0.18em;
  }

  .page-content {
    padding: 0 20px 48px;
  }

  .image-section,
  .image-section--reversed {
    flex-direction: column;
    gap: 24px;
    margin-bottom: 60px;
  }

  .section-image {
    flex: none;
    width: 100%;
  }

  .section-image-clip {
    flex: none;
    width: 100%;
  }

  .section-text h2 {
    font-size: 26px;
  }

  .section-text p {
    font-size: 17px;
  }
}

/* ── RESPONSIVE: SMALL MOBILE (≤480px) ── */
@media (max-width: 480px) {
  .concept-tab {
    font-size: 11px;
    letter-spacing: 0.12em;
  }

  .concept-tab-separator {
    padding: 0 10px;
  }

  h1 {
    font-size: 22px;
    letter-spacing: 0.22em;
  }

  .section-text h2 {
    font-size: 23px;
  }

  .section-text p {
    font-size: 16px;
  }
}