.hub-hero {
  position: relative;
  padding: 72px 0 64px;
  background:
    radial-gradient(circle at 12% 30%, rgba(199, 210, 254, 0.52), transparent 34%),
    radial-gradient(circle at 88% 24%, rgba(103, 232, 249, 0.36), transparent 28%),
    linear-gradient(135deg, #f8fbff 0%, var(--fei-mint-bg) 52%, #fdfefe 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 0.95fr;
  gap: 36px;
  align-items: end;
}

.hero-copy {
  padding-bottom: 18px;
}

.hero-copy h1 {
  max-width: 760px;
  margin-bottom: 16px;
  font-family: var(--font-display);
  font-size: clamp(38px, 4.6vw, 58px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.01;
}

.hero-subtitle {
  max-width: 620px;
  color: var(--fei-text-mid);
  font-size: 17px;
  line-height: 1.72;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.hero-visual {
  position: relative;
}

.hero-overlap-stage {
  min-height: 0;
}

.hero-frame {
  position: absolute;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.75);
  box-shadow: 0 24px 54px rgba(26, 29, 43, 0.12);
  backdrop-filter: blur(8px);
}

.hero-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-frame-tag {
  position: absolute;
  left: 14px;
  bottom: 14px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--fei-ink);
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  box-shadow: 0 8px 18px rgba(26, 29, 43, 0.08);
}

.hero-frame-single {
  position: relative;
  width: 100%;
  aspect-ratio: 1.06 / 1;
  border-color: transparent;
  background: transparent;
  border: 0;
  box-shadow: none;
}

.hero-frame-single img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.filter-shell {
  position: relative;
  z-index: 2;
  margin-top: -24px;
  padding: 34px;
}

.filter-bar {
  display: grid;
  gap: 22px;
}

.filter-search input,
.filter-field select {
  width: 100%;
  border: 2px solid var(--fei-line);
  border-radius: var(--radius-pill);
  background: #fff;
  color: var(--fei-ink);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.filter-search input {
  padding: 18px 22px;
  font-family: var(--font-body);
  font-size: 18px;
}

.filter-search input::placeholder {
  color: var(--fei-text-soft);
}

.filter-search input:focus,
.filter-field select:focus {
  outline: none;
  border-color: rgba(103, 232, 249, 0.9);
  box-shadow: 0 0 0 4px rgba(103, 232, 249, 0.18);
}

.filter-row {
  display: grid;
  gap: 12px;
}

.filter-label {
  color: #93a3b8;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1.4px;
  text-transform: uppercase;
}

.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  border: 1px solid #d9e3ee;
  border-radius: 16px;
  background: #fff;
  color: var(--fei-ink);
  padding: 11px 18px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  transition: all var(--transition-fast);
}

.chip:hover {
  border-color: var(--fei-cyan);
}

.chip-active {
  border-color: var(--fei-ink);
  background: var(--fei-ink);
  color: #fff;
}

.filter-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.filter-field {
  display: grid;
  gap: 8px;
}

.filter-field span {
  color: var(--fei-text-soft);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
}

.filter-field select {
  border-radius: var(--radius-lg);
  padding: 15px 18px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
}

.filter-check-box {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 54px;
  border: 2px solid var(--fei-line);
  border-radius: var(--radius-lg);
  background: #fff;
  padding: 0 16px;
}

.filter-check-box input {
  width: auto;
  margin: 0;
}

.filter-check-box label {
  color: var(--fei-ink);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
}

.modes-shell {
  padding: 36px;
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,252,255,0.96));
}

.featured-shell,
.results-shell {
  padding: 32px;
}

.featured-shell {
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(250,252,255,0.98));
}

.results-shell {
  border-color: rgba(103, 232, 249, 0.42);
  background:
    radial-gradient(circle at 100% 0%, rgba(103,232,249,0.12), transparent 22%),
    linear-gradient(180deg, rgba(248,253,252,0.98), rgba(255,255,255,0.98));
  box-shadow: 0 18px 40px rgba(103, 232, 249, 0.08);
}

.art-history-entry {
  border: 1px solid rgba(233, 238, 245, 0.9);
  border-radius: var(--radius-xl);
  padding: 48px;
  background:
    radial-gradient(circle at 16% 50%, rgba(199,210,254,0.55), transparent 34%),
    radial-gradient(circle at 88% 22%, rgba(103,232,249,0.34), transparent 28%),
    linear-gradient(135deg, #f8fbff 0%, rgba(223,245,242,0.95) 100%);
  box-shadow: var(--shadow-card);
}

.art-history-copy {
  max-width: 760px;
}

.art-history-copy h2 {
  margin-bottom: 12px;
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 800;
}

.survey-shell {
  padding: 32px 36px;
  background: linear-gradient(135deg, rgba(255,255,255,0.98), rgba(223,245,242,0.92));
}

.survey-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.hub-credit-footer {
  padding: 0 0 44px;
}

.hub-credit-shell {
  border-top: 1px solid rgba(217, 227, 238, 0.95);
  padding-top: 20px;
  color: var(--fei-text-soft);
  display: grid;
  gap: 8px;
}

.hub-credit-shell p {
  margin: 0;
  max-width: 980px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.6;
}

@media (max-width: 1100px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    align-items: start;
  }

  .hero-copy {
    padding-bottom: 0;
  }

  .hero-frame-single {
    max-width: 720px;
  }
}

@media (max-width: 768px) {
  .hub-hero {
    padding: 56px 0 52px;
  }

  .hero-copy h1 {
    font-size: clamp(34px, 10vw, 46px);
    line-height: 1.03;
  }

  .hero-grid,
  .filter-grid {
    grid-template-columns: 1fr;
  }

  .hero-overlap-stage {
    min-height: auto;
  }

  .hero-frame {
    position: static;
    width: 100%;
    transform: none;
    aspect-ratio: 4 / 3;
  }

  .filter-shell,
  .featured-shell,
  .results-shell,
  .modes-shell,
  .art-history-entry,
  .survey-shell {
    padding: 24px;
  }

  .survey-head {
    align-items: start;
  }

  .hub-credit-footer {
    padding-bottom: 32px;
  }

  .hub-credit-shell p {
    font-size: 12px;
  }
}