/* ---------------------------
   Reset CSS
   --------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

main,
section,
article,
aside,
header,
footer,
nav,
figure {
  display: block;
}

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

a {
  text-decoration: none;
  color: inherit;
}

h1,
h2,
h3,
h4,
h5,
h6,
p {
  font-size: inherit;
  font-weight: inherit;
  margin: 0;
}

ul,
ol {
  list-style: none;
  padding: 0;
  margin: 0;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
  margin: 0;
}
button {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}
textarea {
  resize: vertical;
}

body {
  margin: 0;
  font-family: "Noto Sans JP", "Noto Sans", sans-serif;
  font-weight: 400;
  color: #333333;
  background: #f8f8f8;
  line-height: 1.8;
  font-size: 14px;
}
a {
  color: inherit;
  text-decoration: none;
}

:root {
  --brand: #efcf28;
  --brand-sub: #fff4be;
  --brand-sub2: #e4e4e4;
  --brand-700: #efcf28;
  --accent: #e73e48;
  --ink: #0f172a;
  --muted: #64748b;
  --card: #ffffff;
  --shadow: 0 10px 20px rgba(15, 23, 42, 0.08);
  --radius-xl: 10px;
}
.fv {
  background: #fff;
}
.fv-box {
  position: relative;
  max-width: 1400px;
  margin: 0 auto;
  aspect-ratio: 750 / 1100;
}
.fv-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.kv-title,
.kv-date,
.fv-cta {
  position: absolute;
  display: block;
  height: auto;
}

.kv-title {
  width: 80%;
  left: 10%;
  top: 30%;
}
.kv-date {
  width: 80%;
  left: 10%;
  top: 45%;
}

.container {
  width: min(100%, 960px);
  padding-inline: 20px;
  margin-inline: auto;
}
.section {
  padding: 50px 0 56px;
}

/* CONCEPT */
.concept-wrap {
  background: var(--brand);
  color: #fff;
}
.concept-title {
  font-weight: 900;
  font-size: 26px;
  text-align: center;
}
.concept-card {
  background: var(--card);
  color: var(--ink);
  border-radius: var(--radius-xl);
  padding: 20px 20px 20px 20px;
  margin-top: 20px;
}
.concept-title img {
  display: block;
  max-width: 152px;
  margin: 0 auto;
}
.stories-title img {
  max-width: 300px;
}

.concept-eyebrow {
  color: var(--brand-700);
  font-weight: 600;
  font-size: 20px;
}

.concept-body {
  margin-top: 14px;
  font-size: 16px;
}

/* 共通カード */
.info-card {
  background: var(--card);
  border-radius: var(--radius-xl);
  padding: 20px;
  margin: 24px 0;
}
.info-card p {
  margin: 30px 0;
  font-size: 15px;
}

.info-header {
  background: #333;
  color: #fff;
  font-weight: 600;
  text-align: center;
  padding: 10px;
  border-radius: 10px 10px 0 0;
  margin: -24px -20px 16px -20px;
}
.section-campaign {
  padding: 40px 0;
}
/* 募集要項 */
.section-info {
  padding: 40px 0 0;
  background: var(--brand);
}
.info-card p {
  padding: 14px 0;
  margin: 0;
  border-top: 1px dotted #333;
}

.info-card p:first-of-type {
  border-top: none;
}

.section-playlist {
  background: var(--brand);
}

.title-text {
  text-align: center;
  color: var(--ink);
  font-size: 15px;
  margin: 10px 0 20px 0;
}

.info-card .playlist-section-text {
  padding-bottom: 30px;
}

/* フッター */
footer {
  background: #333;
  color: #fff;
  text-align: center;
  padding: 40px 0 20px;
  font-size: 12px;
}
footer p {
  padding: 40px 0 20px;
}
.footer-logos {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 24px;
  margin-top: 16px;
}
.footer-logos img {
  max-width: 200px;
}

/* TOPボタン */
.to-top {
  position: fixed;
  right: 10px;
  bottom: 10px;
  z-index: 1000;
}

.to-top button {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

.to-top-img {
  width: 80px;
  height: auto;
  display: block;
}

/* ------------------------------
       Reusable UI parts
    ------------------------------ */
.section-title {
  font-weight: 700;
  letter-spacing: 0.06em;
  font-size: 20px;
  padding-bottom: 20px;
  text-align: center;
}
.card {
  background: var(--card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}
.card.pad {
  padding: 24px;
}
.pill {
  display: inline-block;
  background: #2d2d2d;
  color: #fff;
  border-radius: 14px;
  padding: 10px 16px;
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.08em;
}
.center {
  text-align: center;
}
.btn-primary {
  --h: 60px;
  display: inline-grid;
  place-items: center;
  height: var(--h);
  padding: 0px 70px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  letter-spacing: 0.02em;
  box-shadow: var(--shadow);
  gap: 10px;
  grid-auto-flow: column;
  transition: background 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
  font-size: 16px;
}

.btn-primary:hover {
  background: #e53935;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
}

.btn-icon {
  width: 28px;
  height: 28px;
  display: block;
  transition: transform 0.3s ease;
}

.btn-primary:hover .btn-icon {
  transform: translateX(4px);
}

.btn-primary svg {
  width: 18px;
  height: 18px;
}
.btn-wrap {
  display: grid;
  place-items: center;
  padding: 18px 0 56px;
}

.fv-cta {
  width: 80%;
  left: 10%;
  bottom: 25%;
  padding: 0;
}

.section-p {
  padding: 0 0 50px 0;
}

@media (min-width: 768px) {
  body {
    font-size: 16px;
  }
  .concept-card {
    align-items: center;
    display: flex;
    padding: 50px;
    gap: 20px;
  }
  .concept-card-re {
    flex-direction: row-reverse;
  }
  .concept-eyebrow {
    font-size: 22px;
  }
  .info-card p {
    padding: 25px 50px 50px 50px;
  }
  .info-card h2 {
    padding: 50px 50px 0 50px;
  }
  .info-card-c p {
    line-height: 2.1;
  }
  .meijo-playlist {
    padding: 0px 50px 50px 50px;
  }
  .section-info .info-card p {
    display: grid;
    grid-template-columns: 10em 1fr;
    column-gap: 24px;
    align-items: start;
    padding: 18px 0;
    margin: 0px 50px;
  }
  .section-info .info-card p:first-of-type {
    border-top: none;
    margin-top: 50px;
  }
  .section-info .info-card p:last-of-type {
    margin-bottom: 50px;
  }

  .section-info .info-card p strong {
    display: block;
    white-space: nowrap;
    color: #111;
    font-weight: 700;
  }

  .section-info .info-card p br:first-of-type {
    display: none;
  }
  .card.pad {
    padding: 50px;
    text-align: center;
    line-height: 2.1;
  }
  .schedule-step {
    padding: 30px;
  }
  .footer-logos {
    flex-direction: row;
  }
  .footer-logos img {
    max-width: 250px;
  }
}

.concept-figure {
  display: grid;
  place-items: center;
  padding: 30px 0 15px;
  flex: 1;
}
.concept-figure img {
  max-height: 230px;
  width: auto;
}

.concept-text-box {
  flex: 2;
}

.sp-only {
  display: block;
}

@media (min-width: 768px) {
  .kv-title {
    width: 70%;
    left: 15%;
    top: 18%;
  }
  .kv-date {
    width: 46%;
    left: 27%;
    top: 48%;
  }
  .fv-cta {
    width: 80%;
    left: 10%;
    bottom: 15%;
    padding: 0;
  }
  .fv-box {
    aspect-ratio: 16 / 9;
  }
  .song-page.is-active {
    padding: 0 50px;
  }
  .concept-title img {
    display: block;
    max-width: 274px;
    margin: 0 auto;
  }
  .stories-title img {
    max-width: 542px;
  }
  .title-text {
    font-size: 20px;
    margin: 10px 0 20px 0;
  }
  .sp-only {
    display: none;
  }
  .to-top-img {
    width: 140px;
    height: auto;
    display: block;
  }
}

/* アニメーション */
/* ===== Scroll Reveal ===== */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.reveal.delay-1 {
  transition-delay: 0.1s;
}
.reveal.delay-2 {
  transition-delay: 0.2s;
}
.reveal.delay-3 {
  transition-delay: 0.3s;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ================================
   区切り
   ================================ */

.illust-band {
  width: 90vw;
  margin: 50px auto;
}

.illust-band img {
  display: block;
  width: 100%;
  height: auto;
}

/* ================================
   曲紹介セクション
   ================================ */

.section-songs {
  background: #f1f5f9;
}

.song-pages {
  margin-top: 16px;
}

.song-page {
  display: none;
}

.song-page.is-active {
  display: block;
}

.song-item {
  display: grid;
  grid-template-columns: 1.2fr 2.3fr;
  margin-bottom: 8px;
  font-size: 14px;
}

.song-meta {
  background: var(--brand-sub);
  padding: 10px 10px;
  border-left: 8px solid var(--brand);
  display: flex;
  align-items: center;
}

.info-card .song-title {
  font-weight: 700;
  letter-spacing: 0.03em;
  padding: 0;
}

.song-artist {
  font-weight: 400;
}

.song-item .song-comment {
  background: #111827;
  color: #f9fafb;
  padding: 12px 16px;
  line-height: 1.7;
}

.song-item:nth-child(even) .song-meta {
  background: var(--brand-sub2);
}

.song-item:nth-child(even) .song-comment {
  background: #020617;
}

.song-pagination {
  margin-top: 24px;
  display: flex;
  justify-content: center;
  gap: 8px;
}

.song-page-bullet {
  width: 45px;
  height: 45px;
  border-radius: 999px;
  border: 1px solid #9ca3af;
  background: #fff;
  color: #4b5563;
  font-size: 14spx;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.song-page-bullet.is-active {
  background: var(--brand);
  border-color: var(--brand);
  color: #111827;
}

@media (max-width: 767px) {
  .song-item {
    grid-template-columns: 1fr;
  }

  .song-meta {
    border-left-width: 5px;
  }

  .song-item + .song-item {
    margin-top: 8px;
  }
}

.section-title-playlist {
  padding-top: 30px;
  line-height: 1.5;
}