/* Reset and base styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  color: #000;
  background-color: #fefefe;
  font-family: "Noto Serif JP", serif;
}

a {
  color: inherit;
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid #315b8a;
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 0;
  left: 1rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  color: #fff;
  background: #111;
  transform: translateY(-120%);
}

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

#content-overlay {
  position: relative;
  z-index: 10;
  min-height: 100vh;
  padding: 2rem;
  background: rgba(254, 254, 254, 0.85);
}

site-header,
site-footer {
  display: block;
}

header {
  margin-bottom: 4rem;
  padding: 2rem 0;
  text-align: center;
}

.main-title {
  margin-bottom: 1rem;
  font-size: 4rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.site-home-link {
  text-decoration: none;
}

.subtitle {
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  opacity: 0.8;
}

header nav {
  margin-top: 1.5rem;
  line-height: 2;
}

.global-nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem 2rem;
  padding: 0;
  list-style: none;
}

.global-nav a {
  display: inline-block;
  padding: 0.25rem 0;
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

.global-nav a:hover,
.global-nav a[aria-current="page"] {
  border-bottom-color: currentColor;
}

.language-nav {
  font-size: 0.9rem;
}

.language-nav a {
  text-underline-offset: 0.2em;
}

.member-nav {
  margin-top: 1rem;
}

.member-nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  padding: 0;
  list-style: none;
}

.member-nav a {
  display: inline-block;
  padding: 0.35rem 0.7rem;
  border: 1px solid rgba(0, 0, 0, 0.25);
  border-radius: 4px;
  text-decoration: none;
}

.member-nav a:hover,
.member-nav a[aria-current="page"] {
  color: #fff;
  background: #111;
  border-color: #111;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.page-heading {
  max-width: 1200px;
  margin: 0 auto 2rem;
  font-size: 2.75rem;
  letter-spacing: 0.05em;
}

.page-lead {
  max-width: 1200px;
  margin: -1rem auto 3rem;
  font-size: 1.2rem;
  line-height: 1.8;
}

.content-section {
  margin-bottom: 4rem;
  padding: 2rem;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 8px;
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.09);
}

.content-section > h2 {
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #000;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.content-placeholder {
  font-size: 1.2rem;
  line-height: 1.8;
  letter-spacing: 0.02em;
}

.content-placeholder h3 {
  margin: 2rem 0 0.75rem;
  font-size: 1.6rem;
}

.content-placeholder h3:first-child {
  margin-top: 0;
}

.content-placeholder h4 {
  margin: 1.5rem 0 0.5rem;
  font-size: 1.25rem;
}

.content-placeholder p {
  margin: 0 0 1.2em;
  line-height: 1.6;
}

.content-placeholder ul {
  margin-bottom: 1rem;
  padding-left: 0;
  list-style: none;
}

.content-placeholder li {
  position: relative;
  margin-bottom: 0.8rem;
  padding-left: 1.5rem;
}

.content-placeholder li::before {
  position: absolute;
  left: 0;
  color: #333;
  content: "♪";
  font-weight: 700;
}

.video-wrapper {
  width: 100%;
  aspect-ratio: 16 / 9;
}

.video-wrapper iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.embed-grid {
  display: grid;
  gap: 2rem;
}

.spotify-embed {
  display: block;
  width: 100%;
  height: 152px;
  border: 0;
  border-radius: 12px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.5rem;
  margin-top: 2rem;
}

.content-placeholder p.actions,
.content-section > p.actions {
  margin-top: 2.5rem;
}

.button-link {
  display: inline-block;
  padding: 0.7rem 1.1rem;
  color: #fff;
  background: #111;
  border: 1px solid #111;
  border-radius: 4px;
  text-decoration: none;
}

.button-link:hover {
  color: #111;
  background: #fff;
}

.text-link {
  text-underline-offset: 0.2em;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  gap: 2rem;
}

.card-grid .content-section {
  height: 100%;
  margin-bottom: 0;
}

.archive-section {
  margin-top: 4rem;
}

.section-heading {
  margin-bottom: 1.5rem;
  font-size: 1.6rem;
  letter-spacing: 0.05em;
}

.release-label,
.event-status {
  display: inline-block;
  margin-bottom: 0.75rem;
  padding: 0.2rem 0.6rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-size: 0.85em;
}

.breadcrumbs {
  max-width: 1200px;
  margin: 0 auto 1.5rem;
  font-size: 0.95rem;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0;
  list-style: none;
}

.breadcrumbs li:not(:last-child)::after {
  margin-left: 0.4rem;
  content: "/";
  opacity: 0.5;
}

.notice {
  padding: 1rem 1.25rem;
  border-left: 4px solid #111;
  background: rgba(0, 0, 0, 0.04);
}

.credits-list strong {
  display: inline-block;
  min-width: 7rem;
}

.track-list > li {
  margin-bottom: 1.5rem;
}

.track-list {
  padding-left: 1.5rem;
}

.track-list > li {
  padding-left: 0.25rem;
}

.track-list > li::before {
  content: none;
}

.track-list p {
  margin: 0.35rem 0 0;
}

/* 購入者限定記事 */
.track-page main {
  max-width: 1000px;
}

.track-page .content-section p,
.track-page .content-section ul,
.track-page .content-section ol {
  margin-bottom: 1.2rem;
  line-height: 1.9;
}

.track-page .content-section ul,
.track-page .content-section ol {
  padding-left: 1.75rem;
}

.track-page .content-section li + li {
  margin-top: 0.4rem;
}

.track-page .content-section h3 {
  margin: 2.5rem 0 1rem;
  font-size: 1.6rem;
}

.track-page .content-section h4 {
  margin: 2rem 0 0.75rem;
  font-size: 1.3rem;
}

.track-page .content-section h5 {
  margin: 1.5rem 0 0.5rem;
  font-size: 1.1rem;
}

.track-page .content-section hr {
  margin: 2rem 0;
  border: 0;
  border-top: 1px solid rgba(0, 0, 0, 0.2);
}

.track-page figure {
  margin: 1.5rem auto 2rem;
  text-align: center;
}

.track-page figure img,
.track-page .content-section > p img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  margin: 1rem auto;
}

.track-page .figure-narrow {
  width: 250px;
}

.track-page .figure-medium {
  width: 500px;
}

.track-page .figure-wide {
  width: 700px;
}

.track-page figcaption {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  opacity: 0.75;
}

.track-page iframe {
  display: block;
  width: 100%;
  max-width: 560px;
  height: auto;
  margin: 1.5rem auto;
  aspect-ratio: 16 / 9;
  border: 0;
  border-radius: 8px;
}

.track-page a {
  overflow-wrap: anywhere;
}

/* Workerが返す認証画面 */
.auth-page main {
  max-width: 600px;
}

.auth-panel {
  margin-top: 4rem;
}

.auth-form {
  display: grid;
  gap: 1rem;
}

.auth-form label {
  font-weight: 700;
}

.auth-form input,
.auth-form button {
  width: 100%;
  min-height: 3rem;
  padding: 0.7rem 0.9rem;
  border: 1px solid #777;
  border-radius: 4px;
  font: inherit;
}

.auth-form button {
  color: #fff;
  background: #111;
  cursor: pointer;
}

.auth-error {
  margin-bottom: 1rem;
  color: #a40000;
  font-weight: 700;
}

footer {
  margin-top: 4rem;
  padding: 2rem;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  font-size: 0.9rem;
  text-align: center;
  opacity: 0.7;
}

footer p + p {
  margin-top: 0.5rem;
}

@media (max-width: 768px) {
  #content-overlay {
    padding: 1rem;
  }

  .main-title {
    font-size: 2.5rem;
  }

  .subtitle {
    font-size: 1.2rem;
  }

  .site-header {
    margin-bottom: 2.5rem;
  }

  .global-nav ul {
    gap: 0.25rem 1.25rem;
  }

  main {
    padding: 0 1rem;
  }

  .page-heading {
    font-size: 2rem;
  }

  .page-lead {
    font-size: 1.1rem;
  }

  .content-section {
    margin-bottom: 2rem;
    padding: 1.5rem;
  }

  .content-section > h2 {
    font-size: 1.7rem;
  }

  .content-placeholder {
    font-size: 1.1rem;
  }
}

@media (max-width: 480px) {
  .main-title {
    font-size: 2rem;
  }

  .subtitle {
    font-size: 1rem;
  }

  .global-nav ul {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem;
  }

  .global-nav a {
    width: 100%;
    padding: 0.45rem 0.25rem;
    border: 1px solid rgba(0, 0, 0, 0.2);
    border-radius: 4px;
  }

  .global-nav a:hover,
  .global-nav a[aria-current="page"] {
    border-color: #111;
  }

  .member-nav ul {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .member-nav a {
    width: 100%;
  }

  .page-heading {
    font-size: 1.75rem;
  }

  .content-section > h2 {
    font-size: 1.4rem;
  }

  .content-placeholder {
    font-size: 1rem;
  }
}