:root {
  color-scheme: light;
  --bg: #f7f5f2;
  --surface: #ffffff;
  --text: #1a1a1a;
  --muted: #6e6e6e;
  --line: #e6e2dd;
  --accent: #3d5a52;
  --accent-light: #5a7c72;
  --shadow: 0 18px 50px rgb(0 0 0 / 10%);
  --shadow-hover: 0 28px 80px rgb(0 0 0 / 16%);
  --radius: 12px;
  --radius-sm: 8px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.page-shell {
  width: min(1280px, calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  padding: 72px 0 40px;
  text-align: center;
  background:
    radial-gradient(circle at 50% 0%, rgb(61 90 82 / 8%), transparent 60%);
}

.section-label {
  margin: 0 0 12px;
  color: var(--accent-light);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-header h1 {
  margin: 0 0 16px;
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.hero__summary {
  max-width: 640px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.8;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 40px;
}

.filter-button {
  padding: 10px 20px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition:
    background 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease,
    transform 0.2s ease;
}

.filter-button:hover {
  border-color: var(--accent-light);
  color: var(--accent);
  transform: translateY(-1px);
}

.filter-button.is-active {
  border-color: var(--accent);
  background: var(--accent);
  color: #ffffff;
}

.photo-wall {
  columns: 4 280px;
  column-gap: 20px;
  padding-bottom: 80px;
}

.photo-card {
  break-inside: avoid;
  margin-bottom: 20px;
}

.photo-card__figure {
  position: relative;
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  box-shadow: var(--shadow);
  transition:
    box-shadow 0.35s ease,
    transform 0.35s ease;
}

.photo-card__figure:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.photo-card__image {
  display: block;
  width: 100%;
  height: auto;
  border-radius: inherit;
}


.photo-card__caption {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 20px;
  background: linear-gradient(to top, rgb(0 0 0 / 65%), transparent 60%);
  color: #ffffff;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.photo-card__figure:hover .photo-card__caption,
.photo-card__figure:focus-within .photo-card__caption {
  opacity: 1;
}

.photo-card__title {
  font-size: 1.15rem;
  font-weight: 700;
}

.photo-card__meta {
  font-size: 0.85rem;
  color: rgb(255 255 255 / 85%);
}

.photo-card.is-hidden {
  display: none;
}

.site-footer {
  padding: 40px 0 80px;
  border-top: 1px solid var(--line);
  text-align: center;
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 1024px) {
  .photo-wall {
    columns: 3 260px;
  }
}

@media (max-width: 768px) {
  .site-header {
    padding: 48px 0 32px;
  }

  .hero__summary {
    font-size: 1rem;
  }

  .photo-wall {
    columns: 2 220px;
    column-gap: 16px;
  }

  .photo-card {
    margin-bottom: 16px;
  }

  .photo-card__caption {
    opacity: 1;
    padding: 16px;
  }

  .photo-card__title {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .photo-wall {
    columns: 1 280px;
  }

  .filter-bar {
    gap: 8px;
  }

  .filter-button {
    padding: 8px 16px;
    font-size: 0.9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}