/* ===== Männerchor Tsukuba — Common Stylesheet ===== */

@import url('https://fonts.googleapis.com/css2?family=Zen+Maru+Gothic:wght@400;500;700&family=Kaisei+Decol:wght@400;700&display=swap');

/* ── Variables ── */
:root {
  --col-navy:    #1a2744;
  --col-blue:    #2d5be3;
  --col-sky:     #5b9cf6;
  --col-yellow:  #f5c842;
  --col-pink:    #f06292;
  --col-bg:      #f7f9ff;
  --col-white:   #ffffff;
  --col-text:    #1a2744;
  --col-muted:   #5a6a8a;
  --col-border:  #dce5ff;
  --nav-h:       64px;
  --radius-sm:   8px;
  --radius-md:   14px;
  --radius-lg:   24px;
  --shadow-card: 0 4px 18px rgba(45, 91, 227, 0.10);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Zen Maru Gothic', sans-serif;
  background: var(--col-bg);
  color: var(--col-text);
  font-size: 16px;
  line-height: 1.75;
  min-height: 100vh;
}

img { max-width: 100%; display: block; }
a { color: var(--col-blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Typography ── */
h1, h2, h3, h4 {
  font-family: 'Kaisei Decol', serif;
  line-height: 1.3;
  color: var(--col-navy);
}
h1 { font-size: clamp(1.7rem, 6vw, 2.8rem); }
h2 { font-size: clamp(1.3rem, 4vw, 1.9rem); }
h3 { font-size: clamp(1.1rem, 3vw, 1.4rem); }

p { margin-bottom: 1em; }
p:last-child { margin-bottom: 0; }

/* ── Layout ── */
.container {
  width: min(92%, 860px);
  margin-inline: auto;
}

.section {
  padding: 3.5rem 0;
}

/* ── Navigation ── */
.site-nav {
  background: var(--col-white);
  border-bottom: 2px solid var(--col-border);
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1rem;
}

.nav-logo {
  font-family: 'Kaisei Decol', serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--col-navy);
  line-height: 1.2;
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-logo span {
  display: block;
  font-size: 0.7rem;
  font-family: 'Zen Maru Gothic', sans-serif;
  color: var(--col-muted);
  font-weight: 400;
}

/* hamburger */
.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-shrink: 0;
}
.nav-toggle span {
  display: block;
  width: 26px;
  height: 2.5px;
  background: var(--col-navy);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

.nav-menu {
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background: var(--col-white);
  border-bottom: 2px solid var(--col-border);
  list-style: none;
  display: flex;
  flex-direction: column;
  /* clip-pathで上から下へクリップして完全に隠す */
  clip-path: inset(0 0 100% 0);
  transition: clip-path .35s cubic-bezier(.4,0,.2,1);
  z-index: 99;
  padding: .5rem 0;
}
.nav-menu.open {
  clip-path: inset(0 0 0% 0);
}

.nav-menu li a {
  display: block;
  padding: .75rem 1.5rem;
  color: var(--col-text);
  font-weight: 500;
  font-size: .95rem;
  transition: background .2s;
}
.nav-menu li a:hover,
.nav-menu li a.active {
  background: var(--col-bg);
  color: var(--col-blue);
  text-decoration: none;
}

/* Desktop nav */
@media (min-width: 700px) {
  .nav-toggle { display: none; }
  .nav-menu {
    position: static;
    flex-direction: row;
    clip-path: none;
    transform: none;
    border: none;
    padding: 0;
    gap: .25rem;
  }
  .nav-menu li a {
    padding: .45rem .85rem;
    border-radius: var(--radius-sm);
    font-size: .9rem;
  }
}

/* ── Hero banner ── */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--col-navy);
  color: var(--col-white);
  padding: 3.5rem 0 3rem;
}

.hero::before {
  content: '♩♪♫♬';
  position: absolute;
  font-size: 8rem;
  opacity: .05;
  top: -1rem;
  right: -1.5rem;
  letter-spacing: .5rem;
  line-height: 1;
  pointer-events: none;
}

.hero-eyebrow {
  display: inline-block;
  background: var(--col-yellow);
  color: var(--col-navy);
  font-weight: 700;
  font-size: .8rem;
  padding: .25rem .75rem;
  border-radius: 99px;
  margin-bottom: 1rem;
  letter-spacing: .05em;
}

.hero h1 { color: var(--col-white); }

.hero-sub {
  color: rgba(255,255,255,.75);
  margin-top: .75rem;
  font-size: 1rem;
  max-width: 480px;
}

/* ── Cards ── */
.card {
  background: var(--col-white);
  border-radius: var(--radius-md);
  border: 1.5px solid var(--col-border);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
}

.card-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}

@media (min-width: 600px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 860px) {
  .card-grid.col3 { grid-template-columns: repeat(3, 1fr); }
}

/* ── Section title ── */
.section-title {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: 1.75rem;
}
.section-title::before {
  content: '';
  display: block;
  width: 5px;
  height: 1.6em;
  background: var(--col-blue);
  border-radius: 3px;
  flex-shrink: 0;
}

/* ── Concert list (from JSON) ── */
/* ── Concert list ── */
.concert-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }

/* 年度区切り見出し */
.concert-year-heading {
  font-family: 'Kaisei Decol', serif;
  font-size: .82rem;
  font-weight: 700;
  color: var(--col-muted);
  letter-spacing: .1em;
  padding: 1.2rem 0 .4rem;
  border-bottom: 1px solid var(--col-border);
  margin-bottom: 4px;
}
.concert-year-li:first-child .concert-year-heading { padding-top: 0; }

/* カード本体 */
.concert-item {
  background: var(--col-white);
  border: 0.5px solid var(--col-border);
  border-top: 3px solid var(--col-blue);
  border-radius: var(--radius-md);
  padding: 1rem 1.1rem .85rem;
  display: flex;
  flex-direction: column;
  transition: box-shadow .2s ease, transform .2s ease;
  box-shadow: var(--shadow-card);
}
.concert-item:hover { box-shadow: 0 6px 22px rgba(45,91,227,.13); }
.concert-item.ended { opacity: .55; border-top-color: var(--col-border); }
.concert-item.has-detail { cursor: pointer; }
.concert-item.has-detail:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(45,91,227,.16);
}
.concert-item.has-detail:focus-visible {
  outline: 2px solid var(--col-blue);
  outline-offset: 3px;
}

/* 種別ごとのトップボーダー色 */
.concert-item[data-type="main"]      { border-top-color: #378ADD; }
.concert-item[data-type="joint"]     { border-top-color: #1D9E75; }
.concert-item[data-type="assist"]    { border-top-color: #7F77DD; }
.concert-item[data-type="festival"]  { border-top-color: #BA7517; }
.concert-item[data-type="community"] { border-top-color: #639922; }

/* タイトル */
.concert-name {
  font-family: 'Kaisei Decol', serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--col-navy);
  line-height: 1.4;
  margin: 0 0 .5rem;
}

/* 1行説明 */
.concert-desc {
  font-size: .85rem;
  color: var(--col-muted);
  line-height: 1.6;
  margin: 0 0 .8rem;
}

/* 定義リスト（日時・場所・参加方法） */
.concert-dl {
  display: grid;
  grid-template-columns: 5.2rem 1fr;
  gap: 4px 8px;
  font-size: .85rem;
  margin: 0 0 .75rem;
}
.concert-dl dt { color: var(--col-muted); }
.concert-dl dd { color: var(--col-text); margin: 0; }

/* チケット・詳細リンク */
.concert-link {
  display: inline-block;
  font-size: .82rem;
  color: #185FA5;
  font-weight: 500;
  margin-bottom: .65rem;
}
.concert-link + .concert-link { margin-left: 1rem; }
.concert-link:hover { text-decoration: underline; }

/* フッター：ラベル＋終了バッジ */
.concert-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 0.5px solid var(--col-border);
  padding-top: .6rem;
  margin-top: auto;
}

/* 種別バッジ */
.concert-tag {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  padding: .18rem .7rem;
  border-radius: 99px;
  letter-spacing: .03em;
  border: 0.5px solid transparent;
}
.concert-tag[data-type="main"]      { background: #E6F1FB; color: #0C447C; border-color: #85B7EB; }
.concert-tag[data-type="joint"]     { background: #E1F5EE; color: #085041; border-color: #5DCAA5; }
.concert-tag[data-type="assist"]    { background: #EEEDFE; color: #3C3489; border-color: #AFA9EC; }
.concert-tag[data-type="festival"]  { background: #FAEEDA; color: #633806; border-color: #EF9F27; }
.concert-tag[data-type="community"] { background: #EAF3DE; color: #27500A; border-color: #97C459; }
.concert-item.ended .concert-tag    { background: #f0f0f0; color: #999; border-color: #ddd; }

/* 「終了」テキスト */
.concert-ended-label {
  font-size: .72rem;
  color: var(--col-muted);
  font-weight: 500;
}

/* ── Tag badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  background: #e8f0ff;
  color: var(--col-blue);
  font-size: .8rem;
  font-weight: 700;
  padding: .25rem .7rem;
  border-radius: 99px;
}

/* ── Icon circle ── */
.icon-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #e8f0ff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: .75rem;
  flex-shrink: 0;
}

/* ── Button ── */
.btn {
  display: inline-block;
  background: var(--col-blue);
  color: #fff;
  font-family: 'Zen Maru Gothic', sans-serif;
  font-weight: 700;
  font-size: .95rem;
  padding: .7rem 1.6rem;
  border-radius: 99px;
  border: none;
  cursor: pointer;
  transition: background .2s, transform .15s;
  text-decoration: none;
}
.btn:hover { background: #1d47c4; transform: translateY(-1px); text-decoration: none; color: #fff; }

.btn-outline {
  background: transparent;
  color: var(--col-blue);
  border: 2px solid var(--col-blue);
}
.btn-outline:hover { background: var(--col-blue); color: #fff; }

/* ── Info table ── */
.info-table { width: 100%; border-collapse: collapse; font-size: .95rem; }
.info-table tr { border-bottom: 1px solid var(--col-border); }
.info-table th {
  width: 7rem;
  padding: .75rem .5rem .75rem 0;
  color: var(--col-muted);
  font-weight: 500;
  text-align: left;
  vertical-align: top;
  white-space: nowrap;
}
.info-table td { padding: .75rem 0; }

/* ── Form ── */
.form-group { display: flex; flex-direction: column; gap: .35rem; margin-bottom: 1.25rem; }
.form-group label { font-weight: 700; font-size: .9rem; color: var(--col-navy); }
.form-group input,
.form-group textarea,
.form-group select {
  font-family: 'Zen Maru Gothic', sans-serif;
  font-size: 1rem;
  padding: .65rem .9rem;
  border: 1.5px solid var(--col-border);
  border-radius: var(--radius-sm);
  background: var(--col-white);
  color: var(--col-text);
  transition: border-color .2s;
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus { border-color: var(--col-blue); }
.form-group textarea { resize: vertical; min-height: 130px; }
.form-req { color: var(--col-pink); }

/* ── Footer ── */
.site-footer {
  background: var(--col-navy);
  color: rgba(255,255,255,.7);
  padding: 2.5rem 0 2rem;
  margin-top: 4rem;
  font-size: .88rem;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.footer-brand {
  font-family: 'Kaisei Decol', serif;
  font-size: 1.1rem;
  color: #fff;
  font-weight: 700;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.25rem;
  list-style: none;
}
.footer-links a { color: rgba(255,255,255,.75); }
.footer-links a:hover { color: #fff; text-decoration: none; }
.footer-copy { margin-top: .5rem; font-size: .8rem; }

@media (min-width: 600px) {
  .footer-inner { flex-direction: row; justify-content: space-between; align-items: flex-start; }
}

/* ── Utilities ── */
.text-muted { color: var(--col-muted); }
.text-center { text-align: center; }
.mt-sm { margin-top: .75rem; }
.mt-md { margin-top: 1.5rem; }
.mt-lg { margin-top: 2.5rem; }
.mb-sm { margin-bottom: .75rem; }
.note {
  background: #fffbea;
  border-left: 4px solid var(--col-yellow);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: .8rem 1rem;
  font-size: .9rem;
}

/* ── Loading state ── */
.loading {
  text-align: center;
  padding: 2rem;
  color: var(--col-muted);
  font-size: .95rem;
}