/* ===========================
   Reset & Base
=========================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

:root {
  --navy:   #1B3055;
  --red:    #8C1C1C;
  --gold:   #C9A227;
  --cream:  #F5F0E4;
  --dark:   #1A2744;
  --text:   #2d2d2d;
  --muted:  #666;
  --white:  #ffffff;
  --border: #ddd;

  --font-serif: 'Noto Serif JP', serif;
  --font-sans:  'Noto Sans JP', sans-serif;
  --radius: 4px;
  --shadow: 0 4px 24px rgba(0,0,0,0.10);
  --transition: 0.25s ease;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--white);
  line-height: 1.8;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }

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

ul { list-style: none; }

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===========================
   ナビゲーション
=========================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(27, 39, 68, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(201, 162, 39, 0.3);
}

.nav-container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-brand {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--cream);
  letter-spacing: 0.02em;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.82rem;
  font-weight: 400;
  color: rgba(255,255,255,0.85);
  letter-spacing: 0.04em;
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--gold);
  transition: width var(--transition);
}

.nav-links a:hover { color: var(--gold); }
.nav-links a:hover::after { width: 100%; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px; height: 28px;
  background: none; border: none; cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 100%; height: 2px;
  background: var(--cream);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ===========================
   ヒーロー
=========================== */
.hero {
  padding-top: 64px;
}

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

/* ===========================
   楽団について
=========================== */
.about {
  padding: 75px 0 100px;
  background: var(--white);
}

.about-layout {
  display: flex;
  align-items: flex-start;
  gap: 64px;
}

.about-left {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.about-badge {
  width: 200px;
  margin: 0 auto;
}

.about-badge img { width: 100%; height: auto; display: block; }

.about-text {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.about-text p {
  font-size: 0.9rem;
  line-height: 2;
  color: #444;
}

.about-right {
  flex-shrink: 0;
  width: 380px;
}

.about-circles {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

/* ===========================
   指揮者・トレーナー
=========================== */
.staff {
  padding: 100px 0;
  background: var(--white);
}

/* 常任指揮者 */
.staff-conductor {
  display: flex;
  align-items: center;
  gap: 48px;
  background: var(--dark);
  border-radius: 20px;
  padding: 48px 56px;
  margin-bottom: 64px;
}

.staff-conductor-avatar {
  flex-shrink: 0;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--gold);
}

.staff-conductor-avatar svg { width: 100%; height: 100%; display: block; }

.staff-conductor-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.staff-role {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--dark);
  background: var(--gold);
  padding: 3px 12px;
  border-radius: 2px;
  align-self: flex-start;
}

.staff-name {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
}

.staff-name-en {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.06em;
  font-style: italic;
}

.staff-bio {
  font-size: 0.86rem;
  color: rgba(255,255,255,0.75);
  line-height: 2;
  margin-top: 4px;
}

/* トレーナー小見出し */
.staff-sub-heading {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 28px;
  padding-left: 14px;
  border-left: 3px solid var(--gold);
}

/* トレーナーグリッド */
.staff-trainers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.staff-trainer-card {
  background: var(--white);
  border-radius: 8px;
  padding: 32px 24px;
  text-align: center;
  box-shadow: 0 2px 16px rgba(0,0,0,0.07);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.staff-trainer-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 28px rgba(0,0,0,0.12);
}

.trainer-avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  overflow: hidden;
  margin-bottom: 8px;
  border: 2px solid var(--border);
}

.trainer-avatar svg { width: 100%; height: 100%; display: block; }

.trainer-part {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--gold);
  background: rgba(201,162,39,0.1);
  padding: 2px 10px;
  border-radius: 2px;
}

.trainer-name {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
}

.trainer-name-en {
  font-size: 0.75rem;
  color: var(--muted);
  font-style: italic;
  letter-spacing: 0.04em;
}

.trainer-desc {
  font-size: 0.8rem;
  color: #555;
  line-height: 1.8;
  text-align: left;
  margin-top: 4px;
  display: none; /* プロフィール情報なし時は非表示 */
}

/* ===========================
   演奏会情報
=========================== */
.concerts {
  padding: 80px 0;
  background: var(--dark);
}

.concerts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.concerts-heading {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--white);
  letter-spacing: 0.05em;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--gold);
  display: inline-block;
}

.concert-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 8px;
  overflow: hidden;
  transition: background var(--transition);
  margin-bottom: 20px;
}

.concert-card:hover {
  background: rgba(255,255,255,0.09);
}

.concert-card-sm { margin-top: 20px; }

.concert-card-photo svg,
.concert-card-photo .concert-flyer {
  width: 100%;
  display: block;
}

.concert-card-photo .concert-flyer {
  object-fit: cover;
  object-position: top;
  height: 220px;
}

.concert-card-body {
  padding: 24px;
}

.concert-card-body h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--white);
  margin: 12px 0;
}

.concert-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 2px;
  background: var(--gold);
  color: var(--dark);
  letter-spacing: 0.05em;
}

.concert-tag-record {
  background: transparent;
  border: 1px solid var(--gold);
  color: var(--gold);
}

.concert-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 20px;
}

.concert-meta li {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.75);
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.6;
}

.meta-icon { flex-shrink: 0; }

.btn-outline {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--gold);
  border: 1px solid var(--gold);
  padding: 8px 20px;
  border-radius: 2px;
  transition: all var(--transition);
  letter-spacing: 0.04em;
}

.btn-outline:hover {
  background: var(--gold);
  color: var(--dark);
}

/* ===========================
   セクション見出し
=========================== */
.section-heading {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 700;
  color: var(--navy);
  text-align: center;
  margin-bottom: 48px;
  position: relative;
}

.section-heading::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: var(--gold);
  margin: 14px auto 0;
  border-radius: 2px;
}




.btn-secondary {
  display: inline-block;
  font-size: 0.88rem;
  color: var(--navy);
  border: 1.5px solid var(--navy);
  padding: 12px 40px;
  border-radius: 2px;
  letter-spacing: 0.05em;
  transition: all var(--transition);
}

.btn-secondary:hover {
  background: var(--navy);
  color: var(--white);
}

.records-more {
  margin-top: 20px;
  text-align: left;
}

.records-more .btn-secondary {
  color: rgba(255,255,255,0.8);
  border-color: rgba(255,255,255,0.4);
}

.records-more .btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  color: var(--white);
  border-color: var(--white);
}

/* ===========================
   団員募集
=========================== */
.join {
  padding: 100px 0;
  background: var(--white);
}

.section-lead {
  text-align: center;
  font-size: 0.95rem;
  color: var(--muted);
  margin-top: -28px;
  margin-bottom: 56px;
}

.join-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 56px;
}

.join-item {
  text-align: center;
  padding: 36px 20px;
  border: 1px solid var(--border);
  border-radius: 6px;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.join-item:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  border-color: var(--gold);
}

.join-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
  color: var(--gold);
}

.join-item h3 {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 10px;
}

.join-item p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.7;
}

.join-cta { text-align: center; }

.btn-primary {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--white);
  background: var(--navy);
  padding: 14px 44px;
  border-radius: 2px;
  letter-spacing: 0.06em;
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

.btn-primary:hover {
  background: #243d6a;
  transform: translateY(-1px);
}

/* ===========================
   お問い合わせ
=========================== */
.contact {
  padding: 100px 0;
  background: var(--navy);
}

.section-heading-light {
  color: var(--white);
}

.section-heading-light::after {
  background: var(--gold);
}

.contact-form {
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.84rem;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  letter-spacing: 0.03em;
}

.required {
  color: #e87878;
  font-weight: 700;
}

.form-group input,
.form-group select,
.form-group textarea {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--text);
  background: rgba(255,255,255,0.95);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: var(--radius);
  padding: 12px 16px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23666' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
  cursor: pointer;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(201,162,39,0.18);
}

.form-group textarea { resize: vertical; min-height: 140px; }

.form-group input.input-error,
.form-group select.input-error,
.form-group textarea.input-error {
  border-color: #c0392b;
  background: #fff8f8;
}

.form-error-msg {
  color: #c0392b;
  font-size: 0.78rem;
  margin-top: 4px;
}

.contact-form .btn-primary {
  align-self: center;
  padding: 14px 56px;
  font-size: 0.95rem;
}

/* ===========================
   SNS
=========================== */
.sns {
  background: var(--cream);
  padding: 80px 0;
}

.sns-links {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

.sns-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 40px 48px;
  background: var(--white);
  border-radius: 8px;
  box-shadow: var(--shadow);
  text-decoration: none;
  color: var(--text);
  transition: transform 0.2s, box-shadow 0.2s;
  min-width: 200px;
}

.sns-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.15);
}

.sns-icon {
  width: 48px;
  height: 48px;
  color: var(--navy);
}

.sns-icon svg { width: 100%; height: 100%; }

.sns-name {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1rem;
  color: var(--navy);
}

.sns-handle {
  font-size: 0.82rem;
  color: var(--muted);
}

/* ===========================
   フッター
=========================== */
.footer {
  background: #0f1a30;
  padding: 56px 0 28px;
}

.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 24px;
}

.footer-name-ja {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 6px;
}

.footer-name-en {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.04em;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  justify-content: flex-end;
}

.footer-nav a {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.6);
  transition: color var(--transition);
}

.footer-nav a:hover { color: var(--gold); }

.footer-copy {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.3);
  text-align: center;
  letter-spacing: 0.03em;
}

/* ===========================
   フライヤーモーダル
=========================== */
.flyer-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.flyer-modal.is-open {
  display: flex;
}

.flyer-modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
}

.flyer-modal-content {
  position: relative;
  z-index: 1;
  max-width: min(480px, 92vw);
  max-height: 90vh;
  overflow-y: auto;
  border-radius: 6px;
}

.flyer-modal-content img {
  width: 100%;
  display: block;
  border-radius: 6px;
}

.flyer-modal-close {
  position: absolute;
  top: -16px;
  right: -16px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--white);
  border: none;
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
  z-index: 2;
}

.flyer-modal-close:hover {
  background: var(--cream);
}

/* ===========================
   スクロールフェード
=========================== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===========================
   レスポンシブ
=========================== */
@media (max-width: 1024px) {
  .hero-inner { padding-left: 100px; gap: 36px; }
  .hero-treble { font-size: 7rem; left: 12px; }
  .mosaic-grid {
    grid-template-columns: repeat(3, 96px);
    grid-template-rows: repeat(3, 96px);
  }
  .join-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  /* ナビ */
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: rgba(27,39,68,0.98);
    flex-direction: column;
    gap: 0;
    padding: 16px 0;
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a {
    display: block;
    padding: 12px 24px;
    font-size: 0.9rem;
  }
  .nav-links a::after { display: none; }

  /* ヒーロー */
  .hero { padding: 64px 0 0; }
  .hero-treble { font-size: 5rem; left: 6px; opacity: 0.4; }
  .hero-inner {
    flex-direction: column;
    align-items: flex-start;
    padding-left: 80px;
    gap: 28px;
  }
  .mosaic-grid {
    grid-template-columns: repeat(3, 80px);
    grid-template-rows: repeat(3, 80px);
    gap: 3px;
  }
  .cell-kanji { font-size: 1.5rem; }
  .hero-city-circle { width: 150px; height: 95px; }

  /* About */
  .about-layout {
    flex-direction: column;
    gap: 40px;
  }
  .about-right { width: 100%; }

  /* Staff */
  .staff-conductor { flex-direction: column; align-items: center; text-align: center; padding: 36px 28px; border-radius: 16px; }
  .staff-conductor-info { align-items: center; }
  .staff-role { align-self: center; }
  .staff-trainers { grid-template-columns: 1fr 1fr; }

  /* Concerts */
  .concerts-grid { grid-template-columns: 1fr; }

  /* Join */
  .join-grid { grid-template-columns: 1fr 1fr; }

  /* Contact */
  .form-row { grid-template-columns: 1fr; }

  /* Footer */
  .footer-inner { flex-direction: column; gap: 24px; }
  .footer-nav { justify-content: flex-start; }
}

@media (max-width: 480px) {
  .hero-inner { padding-left: 60px; }
  .mosaic-grid {
    grid-template-columns: repeat(3, 68px);
    grid-template-rows: repeat(3, 68px);
  }
  .cell-kanji { font-size: 1.2rem; }
  .program-grid { grid-template-columns: 1fr; }
  .join-grid { grid-template-columns: 1fr; }
  .staff-trainers { grid-template-columns: 1fr; }
  .hero-treble { font-size: 4rem; }
  .records-more { text-align: center; }
}