/* ============================
   カラーパレット（ダーク＋マイルドネオン）
============================ */
:root {
  --color-bg: #020617;          /* 全体背景：ダークネイビー */
  --color-surface: #ffffff;     /* カード背景 */
  --color-surface-soft: #0b1120;
  --color-main: #f97373;        /* 少し柔らかいピンク */
  --color-sub: #38bdf8;         /* シアンアクセント */
  --color-text-on-dark: #f9fafb;
  --color-text-on-light: #111827;
  --color-muted: #9ca3af;
  --color-border: #1f2937;
}

/* ============================
   全体リセット＆ベース
============================ */
* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue",
    "Yu Gothic", "游ゴシック体", "YuGothic", "メイリオ", Meiryo, sans-serif;
  background: radial-gradient(circle at top, #0f172a 0%, #020617 45%, #000 100%);
  color: var(--color-text-on-dark);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: #38bdf8;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

.site-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 16px;
}

@media screen and (max-width: 767px) {
  .container {
    padding: 0 14px;
  }
}

/* ちょい共通（文章パーツ） */
p { margin: 0 0 12px; }
p:last-child { margin-bottom: 0; }
ul { margin: 0 0 12px; padding-left: 1.2em; }
li { margin: 0 0 6px; }
hr { border: none; border-top: 1px solid #e5e7eb; }

/* ============================
   ヘッダー
============================ */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: linear-gradient(
    to bottom,
    rgba(15, 23, 42, 0.96),
    rgba(15, 23, 42, 0.9),
    rgba(15, 23, 42, 0.86)
  );
  color: var(--color-text-on-dark);
  border-bottom: 1px solid rgba(30, 64, 175, 0.6);
}

.header-top {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 10px 0 8px;
}

.site-logo {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: lowercase;
  color: var(--color-main);
}

.site-logo a {
  color: inherit;
  text-decoration: none;
}

.site-tagline {
  font-size: 13px;
  color: #e5e7eb;
  margin: 3px 0 0;
}

.header-contact {
  font-size: 12px;
  margin-top: 4px;
  text-align: left;
  color: #e5e7eb;
}

.header-contact p {
  margin: 0 0 4px 0;
}

.header-contact strong {
  color: #f9fafb;
}

.header-contact span.note {
  font-size: 11px;
  color: #9ca3af;
}

@media screen and (min-width: 768px) {
  .header-top {
    flex-direction: row;
    align-items: flex-start;
    justify-content: space-between;
    padding: 12px 0 10px;
  }

  .site-tagline {
    max-width: 420px;
  }

  .header-contact {
    text-align: right;
  }
}

/* ============================
   グローバルナビ
============================ */
nav.global-nav {
  background:
    radial-gradient(circle at left, rgba(56, 189, 248, 0.16), transparent),
    radial-gradient(circle at right, rgba(248, 113, 113, 0.14), transparent),
    #020617;
  border-bottom: 1px solid rgba(31, 41, 55, 0.9);
}

.nav-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 8px 0 9px;
}

.nav-inner a {
  font-size: 13px;
  color: #e5e7eb;
  padding: 7px 11px;
  border-radius: 999px;
  white-space: nowrap;
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: rgba(15, 23, 42, 0.95);
  box-shadow: 0 4px 8px rgba(15, 23, 42, 0.7);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition:
    transform 0.12s ease-out,
    box-shadow 0.12s ease-out,
    border-color 0.12s ease-out,
    background-color 0.12s ease-out;
}

.nav-inner a span.en {
  text-transform: lowercase;
  font-size: 11px;
  opacity: 0.8;
}

.nav-inner a span.ja {
  font-size: 12px;
}

.nav-inner a:hover {
  transform: translateY(-1px);
  border-color: rgba(248, 250, 252, 0.85);
  background: linear-gradient(135deg, var(--color-main), var(--color-sub));
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.95);
  text-decoration: none;
}

@media screen and (max-width: 767px) {
  .nav-inner {
    justify-content: flex-start;
  }
}

/* ============================
   ヒーロー（トップ見出し）
============================ */
section#hero {
  position: relative;
  overflow: hidden;
  color: var(--color-text-on-dark);
  padding: 40px 0 46px;
  isolation: isolate;
}

section#hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top left, rgba(248, 113, 113, 0.38), transparent 55%),
    radial-gradient(circle at bottom right, rgba(56, 189, 248, 0.34), transparent 55%),
    url("hero-vocal.jpg") center/cover no-repeat;
  opacity: 0.22;
  filter: blur(1px);
  transform: scale(1.02);
}

section#hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top, rgba(15, 23, 42, 0.75), rgba(15, 23, 42, 0.96));
}

#hero .hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* PC時：左右2カラムを確実に */
@media screen and (min-width: 768px) {
  #hero .hero-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
  }
  #hero .hero-inner > div:first-child {
    flex: 1 1 56%;
    min-width: 0;
  }
  #hero .hero-inner > div:last-child {
    flex: 1 1 44%;
    min-width: 0;
  }
}

.hero-kicker {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}

.hero-kicker::before {
  content: "";
  width: 22px;
  height: 1px;
  background: linear-gradient(90deg, var(--color-main), var(--color-sub));
}

#hero h1 {
  font-size: 22px;
  margin: 0 0 16px;
  line-height: 1.6;
  letter-spacing: 0.01em;
  color: #f9fafb;
}

.hero-highlight {
  color: var(--color-main);
  font-weight: 700;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

/* 右側リード（ベース） */
.hero-lead {
  margin: 0;
  font-size: 14px;
  color: #d1d5db;
  max-width: 520px;
}

/* 右側の“肩書き”をかっこよく */
.hero-role {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #e5e7eb;
  margin: 0 0 10px;
}

/* 右側文章を段落で気持ちよく */
.hero-lead p {
  margin: 0 0 12px;
}
.hero-lead p:last-child {
  margin-bottom: 0;
}

.btn-primary,
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  font-size: 13px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition:
    transform 0.15s ease,
    box-shadow 0.15s ease,
    background-color 0.15s ease,
    border-color 0.15s ease,
    color 0.15s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-main), var(--color-sub));
  color: #ffffff;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.8);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 32px rgba(15, 23, 42, 1);
  text-decoration: none;
}

.btn-outline {
  background: rgba(15, 23, 42, 0.45);
  border-color: rgba(248, 250, 252, 0.65);
  color: #e5e7eb;
}

.btn-outline:hover {
  background: rgba(15, 23, 42, 0.8);
  border-color: rgba(248, 250, 252, 0.9);
  text-decoration: none;
}

@media screen and (min-width: 768px) {
  #hero h1 {
    font-size: 26px;
    max-width: 640px;
  }
  .hero-lead {
    max-width: 420px;
    font-size: 13px;
  }
  .hero-role {
    font-size: 13px;
  }
}

/* ============================
   メインコンテンツ＋サイドバー
============================ */
main.site-main {
  padding: 32px 0 40px;
}

.layout-main {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 1.5fr);
  gap: 28px;
  align-items: flex-start;
}

@media screen and (max-width: 900px) {
  .layout-main {
    grid-template-columns: 1fr;
  }
}

/* ============================
   YouTube / Playlist Embed (Responsive)
============================ */
.video-block {
  margin-bottom: 32px;
}

.video-block h2 {
  margin: 0 0 10px;
}

.video-caption {
  margin-top: 10px;
  color: #9ca3af;
  font-size: 13px;
  line-height: 1.7;
}

.video-embed {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.35);
  box-shadow: 0 16px 36px rgba(15, 23, 42, 0.55);
  background: rgba(15, 23, 42, 0.5);
}

.video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* ============================
   メイン本文（トップ #intro / #news）
============================ */
section#intro {
  margin-bottom: 32px;
  padding: 20px 18px 22px;
  border-radius: 14px;
  background: radial-gradient(circle at top left, rgba(15, 23, 42, 0.06), transparent),
    var(--color-surface);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.4);
  border: 1px solid rgba(148, 163, 184, 0.6);
  color: var(--color-text-on-light);
}

#intro h2 {
  font-size: 19px;
  margin: 0 0 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-on-light);
}

#intro h2::before {
  content: "";
  width: 6px;
  height: 22px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--color-main), var(--color-sub));
}

#intro p {
  margin: 0 0 12px;
  font-size: 15px;
  color: #111827;
}

#intro p:last-child {
  margin-bottom: 0;
}

/* NEWSエリア */
section#news {
  margin-bottom: 12px;
  padding: 18px 18px 20px;
  border-radius: 14px;
  background: linear-gradient(135deg, #020617, #111827);
  box-shadow: 0 12px 26px rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(55, 65, 81, 0.85);
  color: #e5e7eb;
}

#news-header {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 14px;
}

#news-header .en {
  font-size: 13px;
  text-transform: lowercase;
  letter-spacing: 0.18em;
  color: var(--color-muted);
}

#news-header .ja {
  font-size: 13px;
  color: #e5e7eb;
}

.news-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.news-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  padding: 10px 10px 11px;
  border-radius: 10px;
  background:
    radial-gradient(circle at top left, rgba(248, 113, 113, 0.18), transparent),
    rgba(15, 23, 42, 0.96);
  border: 1px solid rgba(75, 85, 99, 0.9);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.95);
  transition:
    transform 0.12s ease-out,
    box-shadow 0.12s ease-out,
    border-color 0.12s ease-out;
}

.news-item:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 32px rgba(15, 23, 42, 1);
  border-color: rgba(248, 250, 252, 0.9);
}

/* 画像なしで使える丸アイコン */
.news-icon {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 20%, #fecaca, var(--color-main));
  box-shadow: 0 4px 10px rgba(248, 113, 113, 0.6);
  position: relative;
  flex-shrink: 0;
}

.news-icon::after {
  content: "N";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  color: #fef2f2;
}

.news-meta {
  font-size: 13px;
  color: #e5e7eb;
}

.news-meta .date {
  display: inline-block;
  font-weight: 600;
  color: #fee2e2;
  margin-bottom: 3px;
  font-size: 12px;
}

/* ============================
   サイドバー（右カラム）
============================ */
aside.site-aside {
  font-size: 13px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* バナーリンク */
#banner {
  background: var(--color-surface);
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  padding: 16px 15px 14px;
  box-shadow: 0 14px 32px rgba(15, 23, 42, 0.65);
  color: var(--color-text-on-light);
}

#banner h3 {
  margin: 0 0 10px;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #111827;
}

#banner h3::before {
  content: "";
  width: 4px;
  height: 16px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--color-main), var(--color-sub));
}

#banner ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#banner ul li {
  margin: 0;
  padding: 0;
}

#banner ul li a {
  display: block;
  padding: 8px 12px;
  border-radius: 999px;
  background: #f3f4f6;
  color: #111827;
  box-shadow: 0 4px 8px rgba(148, 163, 184, 0.5);
  transition:
    transform 0.12s ease-out,
    box-shadow 0.12s ease-out,
    background-color 0.12s ease-out;
}

#banner ul li a:hover {
  background: #e5e7eb;
  transform: translateY(-1px);
  box-shadow: 0 7px 14px rgba(148, 163, 184, 0.8);
  text-decoration: none;
}

/* スクール情報 */
#shopinfo {
  background: var(--color-surface);
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  padding: 16px 15px 16px;
  box-shadow: 0 14px 32px rgba(15, 23, 42, 0.7);
  color: var(--color-text-on-light);
}

#shopinfo h3 {
  margin: 0 0 6px;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

#shopinfo h3 span.en {
  font-size: 11px;
  text-transform: lowercase;
  letter-spacing: 0.14em;
  color: var(--color-muted);
}

#shopinfo h3 span.ja {
  font-size: 13px;
  color: #111827;
}

#shopinfo h4 {
  margin: 0 0 8px;
  font-size: 14px;
  color: #111827;
  font-weight: 600;
}

#shopinfo p {
  margin: 0;
  font-size: 13px;
  color: #374151;
}

#shopinfo a {
  color: var(--color-main);
}

/* ============================
   ページトップリンク
============================ */
.pagetop {
  margin-top: 22px;
  text-align: right;
  font-size: 12px;
}

.pagetop a {
  color: #9ca3af;
}

.pagetop a:hover {
  color: #e5e7eb;
}

/* ============================
   フッター
============================ */
footer.site-footer {
  margin-top: auto;
  background: #020617;
  color: #9ca3af;
  font-size: 12px;
  padding: 12px 0 14px;
  border-top: 1px solid rgba(31, 41, 55, 0.95);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: flex-start;
}

.footer-inner small {
  display: block;
}

.footer-nav {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-nav a {
  color: #e5e7eb;
}

.footer-nav a:hover {
  color: #ffffff;
}

@media screen and (min-width: 640px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

/* ============================
   サブページ用レイアウト
============================ */
.page-header {
  margin-bottom: 20px;
  padding: 18px 18px 16px;
  border-radius: 14px;
  background: radial-gradient(circle at top left, rgba(15, 23, 42, 0.4), rgba(15, 23, 42, 0.9));
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(55, 65, 81, 0.85);
}

.page-header h1 {
  margin: 0 0 6px;
  font-size: 20px;
  color: #f9fafb;
}

.page-header-lead {
  margin: 0;
  font-size: 13px;
  color: #e5e7eb;
}

.page-content {
  padding: 18px 18px 20px;
  border-radius: 14px;
  background: var(--color-surface);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.55);
  border: 1px solid rgba(148, 163, 184, 0.7);
  color: var(--color-text-on-light);
}

.page-content h2 {
  margin: 0 0 8px;
  font-size: 17px;
  color: #111827;
}

.page-content h3 {
  margin: 18px 0 6px;
  font-size: 15px;
  color: #111827;
}

.page-content p,
.page-content li {
  font-size: 14px;
  color: #374151;
}

/* ============================
   モバイル調整
============================ */
@media screen and (max-width: 767px) {
  main.site-main {
    padding: 26px 0 34px;
  }

  section#hero {
    padding: 32px 0 38px;
  }

  #hero h1 {
    font-size: 20px;
  }

  .hero-role {
    font-size: 13px;
    letter-spacing: 0.06em;
  }

  .video-block {
    margin-bottom: 24px;
  }

  .video-embed {
    border-radius: 12px;
  }
}