*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 18% 10%, rgba(248, 165, 184, 0.11), transparent 28rem),
    radial-gradient(circle at 84% 12%, rgba(123, 200, 246, 0.10), transparent 30rem),
    radial-gradient(circle at 50% 78%, rgba(201, 160, 220, 0.10), transparent 32rem),
    var(--bg-gradient);
  color: var(--text-dark);
  font-family: var(--font-body);
  line-height: 1.7;
}

a {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

button,
input {
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  inset-inline-start: var(--space-4);
  inset-block-start: var(--space-4);
  z-index: 20;
  transform: translateY(-160%);
  border-radius: var(--radius-full);
  background: var(--gold);
  color: var(--text-dark);
  padding: var(--space-2) var(--space-4);
  font-weight: 800;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: var(--space-3);
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  width: min(var(--max-wide), calc(100vw - 2rem));
  min-height: 72px;
  margin: var(--space-4) auto 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(16px);
  padding: var(--space-2);
}

.brand,
.main-nav,
.site-footer nav,
.quick-jump,
.hero-actions {
  display: flex;
  align-items: center;
}

.brand {
  gap: var(--space-2);
  min-width: max-content;
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-4);
  color: var(--text-dark);
  font-family: var(--font-display);
  font-weight: 700;
  text-decoration: none;
}

.brand-mark {
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow:
    0 0 0 4px rgba(255, 202, 212, 0.55),
    0 5px 14px rgba(168, 125, 194, 0.22);
}

.main-nav {
  flex-wrap: nowrap;
  gap: var(--space-1);
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: thin;
}

.main-nav a,
.quick-jump a,
.site-footer nav a {
  border-radius: var(--radius-full);
  color: var(--text-medium);
  font-weight: 700;
  text-decoration: none;
}

.main-nav a {
  padding: var(--space-2) var(--space-4);
  white-space: nowrap;
}

.main-nav a[aria-current="page"] {
  background: rgba(255, 202, 212, 0.58);
  border: 1px solid var(--primary-dark);
  box-shadow: inset 0 -3px 0 rgba(232, 137, 156, 0.34);
  color: var(--text-dark);
}

.main-nav a:hover,
.quick-jump a:hover,
.site-footer a:hover {
  background: rgba(255, 202, 212, 0.44);
  color: var(--text-dark);
}

.home-shell,
.article-shell {
  width: min(var(--max-hub), calc(100vw - 2rem));
  margin: 0 auto;
}

.article-shell {
  max-width: var(--max-article);
  padding: var(--space-12) 0;
}

.article-shell-wide {
  max-width: var(--max-hub);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.86fr);
  gap: var(--space-8);
  align-items: center;
  min-height: 620px;
  padding: var(--space-16) 0 var(--space-8);
}

.hero-copy {
  max-width: 680px;
  min-width: 0;
}

.hero-kicker,
.breadcrumb {
  margin: 0 0 var(--space-3);
  color: var(--accent-dark);
  font-family: var(--font-accent);
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0;
}

h1,
h2,
h3 {
  margin: 0;
  color: var(--text-dark);
  font-family: var(--font-display);
  letter-spacing: 0;
  line-height: 1.12;
  overflow-wrap: anywhere;
}

h1 {
  max-width: 12ch;
  font-size: 3.55rem;
}

.page-title h1 {
  max-width: none;
  font-size: 2.85rem;
}

.hero-lede,
.page-title p,
.section-heading p,
.guide-block p,
.source-panel p,
.site-footer p {
  color: var(--text-medium);
}

.hero-lede {
  max-width: 46rem;
  margin: var(--space-5) 0 0;
  font-size: 1.2rem;
}

.hero-actions {
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.button {
  min-height: 46px;
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-5);
  color: var(--text-dark);
  font-weight: 800;
  text-decoration: none;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background 160ms ease,
    box-shadow 160ms ease;
  white-space: nowrap;
}

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

.button:active {
  transform: translateY(0);
}

.button-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-color: rgba(232, 137, 156, 0.42);
}

.button-secondary {
  border-color: rgba(168, 125, 194, 0.45);
  background: linear-gradient(135deg, rgba(223, 197, 236, 0.82), rgba(255, 255, 255, 0.86));
}

.hero-note {
  color: var(--text-light);
  font-size: 0.96rem;
}

.hero-art {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-panel);
  background:
    linear-gradient(135deg, rgba(255, 202, 212, 0.45), rgba(165, 221, 251, 0.30)),
    var(--card-bg);
  box-shadow: var(--shadow-soft);
}

.hero-art img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.quick-jump {
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  margin: 0 auto var(--space-12);
  padding: var(--space-3);
}

.quick-jump a {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.72);
  padding: var(--space-2) var(--space-4);
}

.home-section,
.source-panel,
.page-title,
.guide-block,
.finder-panel,
.feature-card,
.faq-list details {
  border: 1px solid var(--border);
  border-radius: var(--radius-panel);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-card);
}

.home-section {
  display: grid;
  gap: var(--space-6);
  margin: var(--space-5) 0;
  padding: var(--space-8);
  min-width: 0;
}

.section-heading {
  max-width: 780px;
  min-width: 0;
}

.section-heading h2,
.source-panel h2,
.guide-block h2 {
  font-size: 2rem;
}

.action-grid,
.feature-grid,
.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.action-card,
.feature-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-medium);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(240, 248, 255, 0.70));
  color: var(--text-dark);
  padding: var(--space-5);
  text-decoration: none;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    box-shadow 160ms ease;
}

.action-card:hover,
.feature-card:hover {
  border-color: var(--primary-dark);
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.action-card strong,
.action-card span {
  display: block;
}

.action-card span,
.feature-card p,
.feature-card dd {
  color: var(--text-medium);
}

.finder-panel {
  padding: var(--space-5);
}

.search-label {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--text-dark);
  font-weight: 800;
}

input[type="search"] {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  background: var(--card-bg);
  color: var(--text-dark);
  min-height: 48px;
  padding: 0 var(--space-5);
}

input[type="search"]::placeholder {
  color: var(--text-light);
}

.search-count {
  margin-bottom: 0;
  color: var(--text-light);
}

.song-tools {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  margin-top: var(--space-4);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-large);
  background: var(--card-bg);
}

table {
  width: 100%;
  min-width: 980px;
  border-collapse: collapse;
}

caption {
  padding: var(--space-4);
  color: var(--color-text-muted);
  text-align: left;
}

th,
td {
  border-bottom: 1px solid var(--border);
  padding: var(--space-4);
  text-align: left;
  vertical-align: top;
}

th {
  background: linear-gradient(135deg, rgba(255, 202, 212, 0.72), rgba(165, 221, 251, 0.54));
  color: var(--text-dark);
  font-family: var(--font-display);
  font-size: 0.98rem;
}

td span {
  display: block;
  margin-top: var(--space-1);
  color: var(--text-light);
  font-size: 0.92rem;
}

.audio-files {
  margin-top: var(--space-3);
}

.audio-files summary {
  cursor: pointer;
  color: var(--color-accent);
  font-weight: 850;
}

.audio-list {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.audio-item {
  display: grid;
  gap: var(--space-2);
  min-width: 0;
  border: 1px solid color-mix(in srgb, var(--color-border) 74%, transparent);
  border-radius: var(--radius-medium);
  background: color-mix(in srgb, var(--color-surface-soft) 92%, transparent);
  padding: var(--space-3);
}

.audio-item a {
  color: var(--color-text);
  font-weight: 850;
  overflow-wrap: anywhere;
}

.audio-item audio {
  width: 100%;
  min-width: 0;
}

.audio-empty {
  color: var(--color-text-soft);
}

.check-cell {
  width: 1%;
}

.check-cell input {
  width: 1.1rem;
  height: 1.1rem;
  accent-color: var(--color-accent);
}

.status-pill {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  margin-top: 0;
  padding: var(--space-1) var(--space-3);
  background: color-mix(in srgb, var(--color-accent) 12%, transparent);
  color: var(--color-text);
  font-size: 0.78rem;
  font-weight: 850;
}

.spoiler-tools {
  display: grid;
  gap: var(--space-4);
  justify-items: start;
}

.spoiler-box {
  border: 1px solid var(--primary-dark);
  border-radius: var(--radius-medium);
  background: linear-gradient(135deg, rgba(255, 202, 212, 0.40), rgba(223, 197, 236, 0.28));
  padding: var(--space-5);
}

.page-title {
  margin-bottom: var(--space-6);
  padding: var(--space-8);
  min-width: 0;
}

.breadcrumb a {
  color: var(--text-link);
  font-weight: 800;
  text-decoration: none;
}

.guide-block {
  padding: var(--space-6);
  min-width: 0;
}

.guide-grid {
  grid-template-columns: 1fr;
}

.source-actions,
.fact-grid,
.check-grid {
  display: grid;
  gap: var(--space-4);
}

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

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

.download-panel p {
  max-width: 68ch;
}

.fact-card,
.check-card {
  border: 1px solid color-mix(in srgb, var(--color-border) 80%, transparent);
  border-radius: var(--radius-medium);
  background: var(--color-surface-soft);
  padding: var(--space-5);
}

.fact-card span {
  display: block;
  color: var(--color-warning);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 850;
}

.fact-card strong {
  display: block;
  margin-top: var(--space-2);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.1;
}

.fact-card p,
.check-card li,
.step-list li {
  color: var(--color-text-muted);
}

.step-list {
  display: grid;
  gap: var(--space-3);
  padding-left: var(--space-6);
}

.check-card h3 {
  margin: 0 0 var(--space-3);
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.check-card ul,
.guide-block ul {
  padding-left: var(--space-5);
}

.feature-card dl {
  display: grid;
  gap: var(--space-2);
  margin: 0;
}

.feature-card dt {
  color: var(--accent-dark);
  font-family: var(--font-accent);
  font-size: 0.84rem;
  font-weight: 800;
}

.feature-card dd {
  margin: 0;
}

.faq-list {
  display: grid;
  gap: var(--space-3);
}

.faq-list details {
  padding: var(--space-5);
}

.faq-list summary {
  cursor: pointer;
  color: var(--text-dark);
  font-weight: 800;
}

.source-panel {
  margin: var(--space-12) 0;
  padding: var(--space-8);
}

.source-list {
  columns: 2;
  gap: var(--space-8);
  padding-left: var(--space-5);
}

.source-list a {
  color: var(--text-link);
  font-weight: 800;
}

.site-footer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-6);
  width: min(var(--max-wide), calc(100vw - 2rem));
  margin: var(--space-12) auto var(--space-8);
  border-top: 1px solid var(--border);
  padding-top: var(--space-6);
}

.site-footer p {
  max-width: 760px;
  margin: var(--space-2) 0;
}

.site-footer nav {
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: flex-end;
}

.site-footer nav a {
  padding: var(--space-2) var(--space-3);
}

.fine-print {
  grid-column: 1 / -1;
  font-size: 0.92rem;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media (max-width: 1120px) {
  .hero-grid,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .site-header {
    align-items: flex-start;
    border-radius: var(--radius-large);
    display: flex;
    flex-direction: column;
  }

  .main-nav {
    justify-content: flex-start;
    width: 100%;
  }

  .hero-grid {
    min-height: auto;
    padding-top: var(--space-10);
  }

  h1 {
    max-width: 100%;
    font-size: 3rem;
  }

  .action-grid,
  .feature-grid,
  .source-actions,
  .fact-grid,
  .check-grid {
    grid-template-columns: 1fr;
  }

  .site-footer nav {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .home-shell,
  .article-shell,
  .site-header,
  .site-footer {
    width: min(calc(100vw - 1rem), var(--max-hub));
    max-width: calc(100vw - 1rem);
  }

  .home-section,
  .source-panel,
  .page-title,
  .guide-block {
    padding: var(--space-5);
  }

  .main-nav {
    display: flex;
    flex-wrap: nowrap;
    gap: var(--space-1);
    overflow-x: auto;
    padding-block-end: var(--space-1);
    scroll-snap-type: x proximity;
    -webkit-overflow-scrolling: touch;
    width: 100%;
  }

  .main-nav a {
    flex: 0 0 auto;
    min-width: max-content;
    padding: var(--space-2) var(--space-3);
    text-align: center;
    scroll-snap-align: start;
    white-space: nowrap;
  }

  h1,
  .page-title h1 {
    max-width: 100%;
    font-size: 2rem;
    line-height: 1.16;
    white-space: normal;
    word-break: break-word;
  }

  .hero-lede {
    font-size: 1.05rem;
    max-width: 100%;
    overflow-wrap: anywhere;
  }

  .hero-grid,
  .hero-copy,
  .hero-art,
  .quick-jump {
    max-width: 100%;
    min-width: 0;
  }

  .section-heading h2,
  .source-panel h2,
  .guide-block h2 {
    font-size: 1.55rem;
  }

  .hero-copy,
  .hero-lede,
  .hero-note,
  .page-title p,
  .section-heading,
  .guide-block,
  .fact-card,
  .check-card {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    overflow-wrap: break-word;
  }

  .button,
  .hero-actions {
    width: 100%;
  }

  .quick-jump a {
    text-align: center;
  }

  .source-list {
    columns: 1;
  }
}