:root {
  color-scheme: light;
  --ink: #171814;
  --muted: #686b61;
  --paper: #f4f0e7;
  --panel: #fffdf7;
  --line: #d8d3c8;
  --accent: #d3452f;
  --accent-dark: #a92d1c;
  --shadow: 0 18px 45px rgba(32, 30, 24, 0.09);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(23, 24, 20, 0.035) 1px, transparent 1px),
    var(--paper);
  background-size: 100% 32px;
  font-family: "Hiragino Sans", "Yu Gothic", "YuGothic", system-ui,
    -apple-system, sans-serif;
  line-height: 1.7;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid rgba(216, 211, 200, 0.9);
  background: rgba(244, 240, 231, 0.92);
  backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  width: min(1180px, calc(100% - 40px));
  min-height: 72px;
  margin: 0 auto;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  color: var(--panel);
  background: var(--accent);
  font-family: "Hiragino Mincho ProN", "Yu Mincho", serif;
  font-size: 21px;
}

.channel-link {
  padding-bottom: 2px;
  border-bottom: 1px solid currentColor;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

.channel-link:hover {
  color: var(--accent-dark);
}

main,
footer {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  position: relative;
  min-height: 430px;
  padding: 84px 0 64px;
  overflow: hidden;
}

.hero::after {
  position: absolute;
  z-index: -1;
  top: 80px;
  right: 2%;
  width: clamp(180px, 28vw, 340px);
  aspect-ratio: 1;
  border: clamp(28px, 5vw, 62px) solid rgba(211, 69, 47, 0.11);
  border-radius: 50%;
  content: "";
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.2em;
}

h1 {
  max-width: 840px;
  margin: 0;
  font-family: "Hiragino Mincho ProN", "Yu Mincho", serif;
  font-size: clamp(42px, 6vw, 70px);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 1.18;
}

.hero-copy {
  max-width: 620px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(15px, 1.8vw, 18px);
}

.archive-meta {
  display: flex;
  margin-top: 30px;
  align-items: baseline;
  gap: 18px;
  color: var(--muted);
  font-size: 13px;
}

.archive-meta strong {
  color: var(--ink);
  font-size: 18px;
}

.archive {
  padding: 32px 0 100px;
}

.section-heading {
  display: flex;
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--ink);
  align-items: end;
  justify-content: space-between;
}

.section-heading h2 {
  margin: 0;
  font-family: "Hiragino Mincho ProN", "Yu Mincho", serif;
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 600;
}

.section-tools {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 13px;
}

.view-toggle {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--line);
  background: rgba(255, 253, 247, 0.55);
}

.view-toggle button {
  min-width: 64px;
  padding: 6px 10px;
  border: 0;
  color: var(--muted);
  background: transparent;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.view-toggle button[aria-pressed="true"] {
  color: var(--panel);
  background: var(--ink);
}

.view-toggle button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.status {
  padding: 64px 24px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: var(--panel);
  text-align: center;
}

.status-error {
  color: var(--accent-dark);
  border-color: rgba(211, 69, 47, 0.4);
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 36px 18px;
}

.video-card {
  min-width: 0;
  animation: card-in 500ms both;
  animation-delay: calc(var(--card-index) * 45ms);
}

.thumbnail-link {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #ded9ce;
  box-shadow: var(--shadow);
}

.thumbnail {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 280ms ease, filter 280ms ease;
}

.thumbnail-link:hover .thumbnail,
.thumbnail-link:focus-visible .thumbnail {
  filter: saturate(0.8) contrast(1.05);
  transform: scale(1.025);
}

.duration {
  position: absolute;
  right: 8px;
  bottom: 8px;
  padding: 1px 6px;
  color: white;
  background: rgba(23, 24, 20, 0.88);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.card-body {
  padding: 14px 2px 0;
}

.card-meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.upload-date {
  margin: 0 0 6px;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.list-duration {
  display: none;
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.video-card h3 {
  margin: 0;
  font-family: "Hiragino Mincho ProN", "Yu Mincho", serif;
  font-size: clamp(16px, 1.5vw, 19px);
  font-weight: 600;
  line-height: 1.5;
}

.title-link {
  text-decoration-thickness: 1px;
  text-decoration-color: transparent;
  text-underline-offset: 5px;
  transition: color 160ms ease, text-decoration-color 160ms ease;
}

.title-link:hover,
.title-link:focus-visible {
  color: var(--accent-dark);
  text-decoration-color: currentColor;
}

.description-details {
  margin-top: 12px;
  padding-top: 9px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.description-details summary {
  width: fit-content;
  color: var(--ink);
  cursor: pointer;
  font-weight: 700;
}

.description {
  margin: 12px 0 0;
  white-space: pre-wrap;
}

.video-grid[data-view="list"] {
  display: block;
  border-top: 1px solid var(--line);
}

.video-grid[data-view="list"] .video-card {
  border-bottom: 1px solid var(--line);
}

.video-grid[data-view="list"] .thumbnail-link {
  display: none;
}

.video-grid[data-view="list"] .card-body {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr) 92px;
  padding: 15px 4px;
  align-items: start;
  gap: 8px 24px;
}

.video-grid[data-view="list"] .card-meta {
  display: block;
  grid-column: 1;
}

.video-grid[data-view="list"] .upload-date {
  margin: 1px 0 2px;
}

.video-grid[data-view="list"] .list-duration {
  display: block;
}

.video-grid[data-view="list"] h3 {
  grid-column: 2;
  font-family:
    "Hiragino Sans", "Yu Gothic", "YuGothic", system-ui, -apple-system,
    sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

.video-grid[data-view="list"] .description-details {
  grid-column: 3;
  margin: 0;
  padding: 1px 0 0;
  border: 0;
}

.video-grid[data-view="list"] .description-details[open] {
  grid-column: 2 / -1;
}

footer {
  padding: 28px 0 48px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
}

@keyframes card-in {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
}

@media (max-width: 1000px) {
  .hero {
    min-height: auto;
    padding-top: 88px;
  }

  .video-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .video-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .video-grid[data-view="list"] .card-body {
    grid-template-columns: 112px minmax(0, 1fr);
    gap: 8px 16px;
  }

  .video-grid[data-view="list"] .description-details {
    grid-column: 2;
  }
}

@media (max-width: 560px) {
  .header-inner,
  main,
  footer {
    width: min(100% - 28px, 1180px);
  }

  .header-inner {
    min-height: 64px;
  }

  .brand {
    font-size: 14px;
  }

  .channel-link {
    font-size: 11px;
  }

  .hero {
    padding: 72px 0 64px;
  }

  .hero-copy {
    margin-top: 28px;
  }

  .archive-meta {
    align-items: flex-start;
    flex-direction: column;
    gap: 2px;
  }

  .archive {
    padding-bottom: 72px;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 18px;
  }

  .section-tools {
    width: 100%;
    justify-content: space-between;
  }

  .video-grid {
    grid-template-columns: 1fr;
    gap: 46px;
  }

  .video-grid[data-view="list"] .card-body {
    grid-template-columns: 1fr auto;
    gap: 8px 12px;
  }

  .video-grid[data-view="list"] .card-meta {
    display: flex;
    grid-column: 1 / -1;
    justify-content: flex-start;
  }

  .video-grid[data-view="list"] h3 {
    grid-column: 1;
  }

  .video-grid[data-view="list"] .description-details,
  .video-grid[data-view="list"] .description-details[open] {
    grid-column: 2;
  }

  .video-grid[data-view="list"] .description-details[open] {
    grid-column: 1 / -1;
  }
}

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

  .video-card {
    animation: none;
  }

  .thumbnail {
    transition: none;
  }
}