:root {
  color-scheme: light;
  --ink: #202624;
  --muted: #66716c;
  --paper: #f7f9f6;
  --panel: #ffffff;
  --line: #d7dfda;
  --accent: #3f7f72;
  --accent-strong: #245b51;
  --soft: #eef5f1;
  --warn: #8a5a19;
  --shadow: 0 18px 48px rgba(44, 38, 31, 0.1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, "Noto Sans JP", sans-serif;
  line-height: 1.65;
}

a {
  color: var(--accent-strong);
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(247, 249, 246, 0.94);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
}

.nav {
  max-width: 1120px;
  margin: 0 auto;
  min-height: 64px;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  color: var(--ink);
  font-weight: 750;
  text-decoration: none;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.95rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--accent-strong);
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 40px 20px 64px;
}

.hero {
  padding: 42px 0 30px;
  display: grid;
  grid-template-columns: minmax(0, 0.96fr) minmax(340px, 1.04fr);
  gap: 42px;
  align-items: center;
}

.eyebrow {
  color: var(--accent-strong);
  font-weight: 700;
  font-size: 0.84rem;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.2;
  letter-spacing: 0;
  margin: 0;
}

h1 {
  font-size: clamp(2.1rem, 4vw, 3.7rem);
  max-width: 11em;
}

h2 {
  font-size: 1.55rem;
  margin-bottom: 14px;
}

h3 {
  font-size: 1.08rem;
}

.lead {
  color: var(--muted);
  font-size: 1.08rem;
  max-width: 680px;
  margin: 18px 0 0;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.button {
  border: 1px solid var(--line);
  border-radius: 8px;
  min-height: 42px;
  padding: 9px 14px;
  background: var(--panel);
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.button[disabled],
.button.disabled {
  color: #9a9288;
  background: #f2eee8;
  cursor: not-allowed;
}

.video-frame {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #141b19;
  box-shadow: var(--shadow);
}

.video-frame iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.preview-panel {
  display: grid;
  gap: 12px;
}

.preview-status {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 12px 14px;
  display: grid;
  gap: 4px;
}

.preview-status strong {
  font-size: 1rem;
}

.preview-status span:last-child {
  color: var(--muted);
  font-size: 0.92rem;
}

.notice {
  margin: 28px 0;
  padding: 16px 18px;
  border: 1px solid #d9c897;
  border-radius: 8px;
  background: #fff8df;
  color: #4b3a16;
}

.section {
  padding: 34px 0;
  border-top: 1px solid var(--line);
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.work-card,
.license-box,
.track-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.work-card {
  padding: 18px;
  text-decoration: none;
  color: var(--ink);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.work-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.meta {
  color: var(--muted);
  font-size: 0.92rem;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.tag {
  border-radius: 999px;
  background: var(--soft);
  color: var(--accent-strong);
  padding: 4px 10px;
  font-size: 0.82rem;
  font-weight: 700;
}

.track-list {
  display: grid;
  gap: 12px;
}

.track-card {
  padding: 16px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
}

.track-card.is-previewing {
  border-color: var(--accent);
  background: var(--soft);
}

.track-title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.track-id {
  color: var(--muted);
  font-size: 0.86rem;
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

.track-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.license-box {
  padding: 18px;
}

.license-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}

.license-box ul {
  margin: 10px 0 0;
  padding-left: 20px;
}

.footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  padding: 24px 20px 36px;
  text-align: center;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  background: var(--ink);
  color: white;
  border-radius: 8px;
  padding: 10px 14px;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease;
}

.toast.is-visible {
  opacity: 1;
}

@media (max-width: 760px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .nav-links {
    flex-wrap: wrap;
  }

  .hero {
    grid-template-columns: 1fr;
    padding-top: 28px;
  }

  .track-card {
    grid-template-columns: 1fr;
  }

  .track-actions {
    justify-content: flex-start;
  }
}