/* ===========================
   ベースリセット・変数
   =========================== */
:root {
  --color-primary: #0a41ad;
  --color-primary-dark: #083285;
  --color-text: #333;
  --color-text-light: #666;
  --color-bg: #fff;
  --color-bg-alt: #f7f9fb;
  --color-border: #e2e8f0;
  --color-success: #22c55e;
  --color-error: #ef4444;
  --font-base: "Hiragino Kaku Gothic ProN", "ヒラギノ角ゴ ProN W3", "Meiryo", "メイリオ", sans-serif;
  --header-h: 64px;
  --radius: 8px;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --transition: 0.2s ease;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-base);
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
ul, ol { list-style: none; margin: 0; padding: 0; }
h1,h2,h3,h4,h5,h6,p,dl,dt,dd,figure { margin: 0; padding: 0; }

/* ===========================
   ヘッダー
   =========================== */
#site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}
#site-header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

#logo { display: flex; align-items: center; margin-left: -10px; }
#logo a { display: flex; align-items: center; gap: 4px; }
#logo img { width: auto; height: 44px; display: block; }
#logo .logo-text {
  font-size: 18px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-text);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

/* PC ナビ */
#pc-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
}
#pc-nav a {
  display: inline-block;
  padding: 6px 14px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius);
  color: var(--color-text);
  transition: background var(--transition), color var(--transition);
}
#pc-nav a:hover { background: var(--color-bg-alt); color: var(--color-primary); }
#pc-nav .btn-contact {
  background: var(--color-primary);
  color: #fff;
  padding: 6px 18px;
}
#pc-nav .btn-contact:hover { background: var(--color-primary-dark); color: #fff; }

/* ハンバーガー */
#hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 36px;
  height: 24px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
}
#hamburger span {
  display: block;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
  transform-origin: center;
}
#hamburger.is-open span:nth-child(1) { transform: translateY(11px) rotate(45deg); }
#hamburger.is-open span:nth-child(2) { opacity: 0; }
#hamburger.is-open span:nth-child(3) { transform: translateY(-11px) rotate(-45deg); }

/* SP ナビ */
#sp-nav {
  display: none;
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.3s ease;
  background: #fff;
  border-top: 1px solid var(--color-border);
}
#sp-nav.is-open { max-height: 400px; }
#sp-nav a {
  display: block;
  padding: 14px 24px;
  font-weight: 600;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}
#sp-nav a:hover { background: var(--color-bg-alt); color: var(--color-primary); }

/* ===========================
   ヒーロー
   =========================== */
.hero {
  position: relative;
  margin-top: var(--header-h);
  overflow: hidden;
}
.hero img {
  width: 100%;
  /* 画面幅に応じて高さを可変にし、広い画面でも縦が潰れて顔が切れないようにする */
  height: clamp(420px, 40vw, 720px);
  object-fit: cover;
  object-position: center 15%;
  display: block;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.3);
}
.hero-text {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 8%;
}
.hero-line {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 900;
  color: #fff;
  line-height: 1.2;
  text-shadow: 0 2px 12px rgba(0,0,0,0.4);
}
.hero-line:nth-child(2) { text-align: center; }
.hero-line:nth-child(3) { text-align: right; padding-right: 8%; }

/* ===========================
   セクション共通
   =========================== */
.section { padding: 72px 0; }
.section-alt { background: var(--color-bg-alt); }
.section-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}
.section-title {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 800;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: 40px;
  position: relative;
  padding-bottom: 16px;
}
.section-title::after {
  content: '';
  position: absolute;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 48px; height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
}
.section-desc {
  text-align: left;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
  margin-bottom: 32px;
}
.empty-msg {
  text-align: center;
  color: var(--color-text-light);
  padding: 32px 0;
}

/* ===========================
   バドミントンスクール
   =========================== */
.school-card {
  max-width: 860px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  box-shadow: 0 18px 50px rgba(10, 65, 173, 0.10);
  overflow: hidden;
  text-align: center;
}

/* 上部：ブランドカラーのヘッダー帯 */
.school-card-head {
  padding: 44px 32px 38px;
  color: #fff;
  background:
    radial-gradient(130% 140% at 50% -40%, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0) 60%),
    linear-gradient(135deg, #0a41ad 0%, #1150c9 55%, #2f6bd8 100%);
}
.school-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}
.school-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #6ee7a0;
  box-shadow: 0 0 0 0 rgba(110, 231, 160, 0.7);
  animation: schoolPulse 2s ease-out infinite;
}
@keyframes schoolPulse {
  0%   { box-shadow: 0 0 0 0 rgba(110, 231, 160, 0.6); }
  70%  { box-shadow: 0 0 0 8px rgba(110, 231, 160, 0); }
  100% { box-shadow: 0 0 0 0 rgba(110, 231, 160, 0); }
}
@media (prefers-reduced-motion: reduce) {
  .school-badge-dot { animation: none; }
}
.school-lead {
  color: rgba(255, 255, 255, 0.96);
  font-size: 15px;
  line-height: 2;
  max-width: 620px;
  margin: 0 auto;
}

/* 特徴カード */
.school-points {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 20px;
  padding: 36px 32px 4px;
}
.school-points li {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 28px 20px 24px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.school-points li:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(10, 65, 173, 0.13);
  border-color: transparent;
}
.school-point-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: linear-gradient(145deg, #eaf1ff, #dbe7ff);
  color: var(--color-primary);
}
.school-point-icon svg { width: 30px; height: 30px; display: block; }
.school-points h3 {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}
.school-points p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.85;
}

/* CTA：やわらかいブルーの帯 */
.school-cta {
  margin: 28px 24px 32px;
  padding: 30px 24px;
  background: var(--color-bg-alt);
  border-radius: 16px;
}
.school-cta p {
  color: var(--color-text-light);
  font-size: 14px;
  line-height: 1.9;
  margin-bottom: 20px;
}
.btn-primary {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  padding: 14px 36px;
  border-radius: 999px;
  box-shadow: 0 8px 20px rgba(10, 65, 173, 0.28);
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(10, 65, 173, 0.34);
}

@media (max-width: 600px) {
  .school-card-head { padding: 36px 20px 30px; }
  .school-points { padding: 28px 20px 4px; }
  .school-cta { margin: 24px 16px 24px; padding: 26px 18px; }
}

/* ===========================
   NEWS
   =========================== */
.news-list {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  max-height: 260px;
  overflow-y: auto;
}
.news-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  flex-wrap: wrap;
}
.news-item:last-child { border-bottom: none; }
.news-date {
  font-size: 13px;
  font-weight: 600;
  color: #555;
  white-space: nowrap;
  flex-shrink: 0;
  min-width: 110px;
}
.news-label {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  white-space: nowrap;
  flex-shrink: 0;
  line-height: 1.6;
}
.news-label.hpUpdate { background: #5cb85c; }
.news-label.recruit  { background: var(--color-primary); }
.news-label.info     { background: #f0a30a; }
.news-label.app      { background: #E36276; }
.news-label.new      { background: #ef4444; }
.news-text { font-size: 14px; color: var(--color-text); }

/* ===========================
   事業内容
   =========================== */
.business-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.business-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px 28px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.business-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}
.business-icon {
  display: block;
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  background-color: var(--color-primary);
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  -webkit-mask-size: contain;
  mask-size: contain;
}
.business-icon--consult {
  -webkit-mask-image: url(../images/problemSolvingImg.png);
  mask-image: url(../images/problemSolvingImg.png);
}
.business-icon--dev {
  -webkit-mask-image: url(../images/appDevImg.png);
  mask-image: url(../images/appDevImg.png);
}
.business-icon--school {
  -webkit-mask-image: url(../images/badmintonImg.svg);
  mask-image: url(../images/badmintonImg.svg);
}
.business-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}
.business-card p {
  text-align: left;
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* ===========================
   アプリ
   =========================== */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  align-items: stretch;
}
.app-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  display: flex;
  gap: 16px;
  align-items: stretch;
  transition: transform var(--transition), box-shadow var(--transition);
}
.app-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}
.app-icon {
  width: 72px;
  height: 72px;
  border-radius: 16px;
  object-fit: cover;
  flex-shrink: 0;
}
.app-icon-placeholder {
  width: 72px;
  height: 72px;
  border-radius: 16px;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  flex-shrink: 0;
}
.app-info { display: flex; flex-direction: column; flex: 1; min-width: 0; padding-right: 16px; }
.app-desc { flex: 1; }
.app-info h3 { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.app-platform { font-size: 12px; color: var(--color-primary); font-weight: 600; margin-bottom: 6px; }
.app-desc { font-size: 13px; color: var(--color-text-light); margin-bottom: 12px; text-align: left; }
.app-links { display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }
.app-store-badges { display: flex; flex-direction: row; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: flex-start; width: 100%; }
.app-store-badges .btn-store { flex: 0 0 auto; width: 130px; max-width: 100%; }
.btn-store {
  display: inline-block;
  line-height: 0;
}
.store-badge {
  display: block;
  width: 100%;
  height: auto;
}
.btn-ios, .btn-android { background: none; padding: 0; }
.btn-web {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 44px;
  padding: 0 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  background: var(--color-primary);
}

/* ===========================
   会社概要
   =========================== */
.company-table { max-width: 640px; margin: 0 auto; }
.company-table dl {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}
.company-row {
  display: grid;
  grid-template-columns: 130px 1fr;
  border-bottom: 1px solid var(--color-border);
}
.company-row:last-child { border-bottom: none; }
.company-row:nth-child(even) { background: #f7f9fb; }
.company-row dt {
  font-weight: 700;
  font-size: 14px;
  color: var(--color-primary);
  background: #e8eef9;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  border-right: 1px solid var(--color-border);
}
.company-row dd {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  font-size: 14px;
  color: var(--color-text);
}
.company-row dd img { height: 26px; width: auto; }

/* ===========================
   お問い合わせフォーム
   =========================== */
.alert {
  padding: 14px 20px;
  border-radius: var(--radius);
  margin-bottom: 24px;
  font-weight: 600;
}
.alert-success { background: #dcfce7; color: #166534; border: 1px solid #86efac; }
.alert-error   { background: #fee2e2; color: #991b1b; border: 1px solid #fca5a5; }

#contact-form { max-width: 600px; margin: 0 auto; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 6px;
  color: var(--color-text);
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 15px;
  font-family: var(--font-base);
  color: var(--color-text);
  transition: border-color var(--transition);
  background: #fff;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(56,182,255,0.15);
}
.form-group textarea { resize: vertical; min-height: 140px; }
.badge-required {
  display: block;
  padding: 1px 6px;
  background: #ef4444;
  color: #fff;
  font-size: 11px;
  border-radius: 3px;
  font-weight: 700;
  width: fit-content;
  margin-bottom: 4px;
}
.badge-optional {
  display: inline-block;
  padding: 1px 6px;
  background: var(--color-primary);
  color: #fff;
  font-size: 11px;
  border-radius: 3px;
  font-weight: 700;
  margin-left: 6px;
  vertical-align: middle;
}
.form-submit { text-align: center; margin-top: 28px; }
.form-submit button {
  padding: 14px 56px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  font-family: var(--font-base);
}
.form-submit button:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
}
.form-submit button:active { transform: translateY(0); }

/* ===========================
   フッター
   =========================== */
#site-footer {
  background: var(--color-primary);
  color: #fff;
  padding: 24px 0;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}
.footer-inner p { font-weight: 700; margin-bottom: 4px; }
.footer-inner a { color: #fff; }
.footer-inner small { font-size: 12px; opacity: 0.8; }

/* ===========================
   ページトップボタン
   =========================== */
#pagetop {
  position: fixed;
  bottom: 32px;
  right: 24px;
  width: 48px;
  height: 48px;
  background: rgba(0,0,0,0.55);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, background var(--transition);
  z-index: 900;
}
#pagetop.visible { opacity: 1; pointer-events: auto; }
#pagetop:hover { background: rgba(0,0,0,0.75); }

/* ===========================
   レスポンシブ
   =========================== */

@media (max-width: 800px) {
  #pc-nav  { display: none; }
  #hamburger { display: flex; }
  #sp-nav  { display: block; }

  /* スマホ・タブレットは画像全体を表示（現状維持） */
  .hero img {
    height: auto;
    max-height: 520px;
    object-position: center top;
  }
}

@media (max-width: 600px) {
  .section { padding: 48px 0; }

  .news-item { flex-wrap: wrap; gap: 6px; }
  .news-date { min-width: auto; }
  .news-text { width: 100%; }

  .company-row { grid-template-columns: 80px 1fr; }
  .company-row dt { padding: 12px 12px; font-size: 13px; }
  .company-row dd { padding: 12px 12px; font-size: 13px; }

  .app-card { flex-direction: column; align-items: center; text-align: center; }
  .app-links { justify-content: center; align-items: center; }
  .app-store-badges { justify-content: center; }
}

/* バドミントン実業団 */
/* バドミントン実業団バナー */
/* .badminton-banner-inner {
  background: cornflowerblue;
  padding: 40px;
} */

.badminton-banner {
  max-width: 600px;
  margin: 0 auto;
  display: block;
  border-radius: 10px;
  overflow: hidden;
  background: linear-gradient(120deg, #0d2a52 0%, #1a4a8a 50%, #1e6bb5 100%);
  box-shadow: 0 4px 20px rgba(0,0,0,0.18);
  cursor: pointer;
  transition: opacity 0.2s ease, box-shadow 0.2s ease;
}
.badminton-banner:hover {
  opacity: 0.88;
  box-shadow: 0 6px 28px rgba(0,0,0,0.28);
}
.badminton-banner-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 48px 40px;
  color: #fff;
}
.badminton-banner-icon {
  font-size: 22px;
  font-style: normal;
  line-height: 1;
  border: 2px solid rgba(255,255,255,0.7);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.badminton-banner-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.badminton-banner-title-line {
  display: flex;
  align-items: center;
  gap: 12px;
}
.badminton-banner-sub {
  font-size: 13px;
  font-weight: 400;
  color: rgba(255,255,255,0.75);
  letter-spacing: 0.05em;
}

@media (max-width: 600px) {
  .badminton-banner-inner {
    flex-direction: column;
    padding: 36px 24px;
    gap: 12px;
    text-align: center;
  }
  .badminton-banner-text { font-size: 16px; }
}