/* ===================================================
   スマホ専用スタイル (max-width: 767px)
   - 見た目は変わらず、vwやremの表記を使用
   - スマホサイズに最適化
   =================================================== */

@media (max-width: 767px) {
  /* 基本設定 */
  :root {
    --container: 95vw;
    --gutter: 1.5rem;
  }

  body{
    overflow-x: hidden;
  }

  main{
    overflow-x: hidden;
  }
  /* コンテナ */
  .inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--gutter);
  }

  /* ヘッダー */


  .site-header{
    height: calc(120vw / 12.6);
  }

  .brand__logo {
    height: calc(80vw / 12.6);
    width: auto;
    position: relative;
    left: calc(47vw / 12.6);
    top: calc(15vw / 12.6);
  }

  .topbar {
    padding: 0.375rem 0 0;
  }

  .topbar__link {
    font-size: 0.5rem;
    top: 0.25rem;
  }

  .header-main {
    gap: 1rem;
    padding: 0.5rem 0 0.5rem;
    position: relative;
  }

  /* ハンバーガーメニュー */
  .hamburger-menu {
    display: flex;
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1002;
    background: rgba(255, 255, 255, 60%);
            padding: 0.3125rem;
            border-radius: 4px;
  }

  .hamburger-menu[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(0.7rem, -0.75rem);
  }
  

  /* グローバルナビゲーション */
  .global-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .topbar{
    display: none;
  }

  .ham_visible{
    position: relative;
    display: list-item;
  }


  .global-nav.is-open {
    width:105vw;
    transform: translateX(-9vw);
    z-index: 1;
  }

  .global-nav ul {
    gap: 0.5rem;
    flex-direction: column;
    text-align: center;
    padding: 1rem 0;
    max-height: 100vh;
  }

  .global-nav.is-open li{
border-bottom:1px solid #e6e7ec;  
 }


  .global-nav a {
    font-size: 1.125rem;
    padding: 1rem 0;
    display: block;
    color: var(--brand-maroon);
    font-weight: 600;
    transition: color 0.3s ease;
  }

  .global-nav a:hover {
    color: var(--brand-blue);
  }

  /* ヒーロー */
  .hero__content {
    padding: 3.25rem 0 3.5rem;
  }

  .hero__content h1 {
    font-size: 1.125rem;
    margin: 0 0 0.5rem;
    line-height: 1.4;
  }

  .hero__content p {
    margin: 0 0 1rem;
    font-size: 0.875rem;
  }

  .btn {
    padding: 0.75rem 1rem;
    border-radius: 0.25rem;
    border: 0.125rem solid #fff;
    font-size: 0.875rem;
  }

  .donation-btn{
    border: calc(1vw / 12.6) solid #003770;
    width: calc(350vw / 12.6);
    border-radius: calc(15vw / 12.6); 
    padding: calc(20vw / 12.6) calc(9vw / 12.6);
    left: calc(50vw + 210vw / 12.6);
    top: calc(-32vw / 12.6);
    font-size: calc(36vw / 12.6);
    letter-spacing: calc(1vw / 12.6);
  }
.donation-btn a{
    left: calc(26vw / 12.6);
    letter-spacing: calc(2vw / 12.6);

}
  .donation-btn:before{
    font-size: calc(54vw / 12.6);
    margin-right: calc(7vw / 12.6);
    top: calc(-1vw / 12.6);
    left: calc(30vw / 12.6);
  }

  /* セクション共通 */
  .section {
    padding: 3.5rem 0;
  }

  .section h2 {
    margin: 0 auto 1rem;
    line-height: 1.3;
    width:90vw;
    padding-right: 5vw;
    padding-left: 5vw;
    }

  .section h3 {
    margin: 0.5rem 0 0.75rem;
    line-height: 1.4;
    padding-right: 5vw;
    padding-left: 5vw;
  }

  .section h4 {
    margin: 0.5rem 0 0.5rem;
    line-height: 1.4;
      padding-right: calc(5vw - 0.75rem);
      padding-left: calc(5vw - 0.75rem);
    }

  .section p{
    padding-right: 5vw;
    padding-left: 5vw;
    text-align: justify;
  }

  /* 段組み */
  .cols {
    gap: 1.5rem;
    grid-template-columns: 1fr;
  }

  .col--media img {
    border-radius: 0.5rem;
    box-shadow: 0 0.375rem 1rem rgba(0,0,0,.08);
  }

  /* 学園長挨拶 */
  #appeal .col--text p {
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    line-height: 1.7;
    text-align: justify;
  }

  #appeal .figure img {
    width: 12.5rem;
    max-width: 100%;
    margin: 0 auto;
  }


  /* 募金メニュー */
  #programs h2 {
    padding: 0.5rem 0.75rem;
    margin-bottom: 1rem;
    font-size: 1.25rem;
    letter-spacing: 0.125rem;
    text-align: center;
    width: 100%;
  }

  #programs h3 {
    letter-spacing: 0.125rem;
    margin-bottom: 0.75rem;
  }

  #programs h3 .donationpurpose{
    font-size:16px;
  }

  #programs h3 .donationtitle {
    font-size: 1.125rem;
    display: block;
    margin-bottom: 0.25rem;
  }

  #programs h3 .donationnote {
    font-size: 0.875rem;
    letter-spacing: 0;
    display: block;
    margin-bottom: 0.25rem;
  }

  #programs h3 .donationporpose {
    font-size: 1rem;
    display: block;
  }

  #programs ul.list {
    margin-top: 0.5rem;
    padding-left: 1.5rem;
  }

  #programs .inner {
    padding-bottom: 2.5rem;
  }

  /* キャンパス再構築 */
  #campus-rebuild .cols{
    grid-template-columns:100%;
  }

  #campus-rebuild .campus-banner {
    padding: 2rem 0;
  }

  #campus-rebuild .campus-banner h2 {
    font-size: 1.25rem;
    letter-spacing: 0.02em;
  }

  #campus-rebuild .campus-content {
    padding: 2.5rem 0;
  }

  #campus-rebuild .campus-content h3 {
    font-size: 1.125rem;
    margin: 0 0 0.75rem 0;
  }

  #campus-rebuild .campus-content .subtitle {
    font-size: 0.75rem;
    margin: 0 0 1rem 0;
  }

  #campus-rebuild .campus-content .quote {
    font-size: 0.875rem;
    margin: 0 0 0.75rem 0;
  }

  #campus-rebuild .campus-content p {
    margin: 0 0 1rem 0;
    font-size: 0.875rem;
  }

  #campus-rebuild .campus-content .list li {
    margin: 1rem 0;
    padding-left: 1rem;
  }

  #campus-rebuild .campus-content .list strong {
    font-size: 0.875rem;
  }

  #campus-rebuild .campus-content .list .highlight {
    font-size: 0.8rem;
    margin: 0.375rem 0;
  }

  /* グレーの四角い背景 */
  #campus-rebuild .campus-content .gray_square {
    padding: 1rem;
    border-radius: 6px;
    margin: 1rem 0;
  }

  /* 卒業生インタビュー（桜の背景） */
  #alumni .banner {
    height: 10rem;
  }

  #alumni .banner h2 {
    font-size: 1.25rem;
    letter-spacing: 0.125rem;
  }

  section#alumni .inner{
    padding-right:5vw;
    padding-left:5vw;
  }

  #alumni .banner h2{
    margin-left:calc(100vw / 12.6);
    text-shadow: 1px 1px 2px rgba(255, 255, 255, 0.9);
  }

  /* 記念品 */
  #keepsakes h2 {
    margin-bottom: 0.75rem;
  }

  #keepsakes .h3-sub{
    font-size:18px;
  }

  .gift-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
  }

  .gift-item {
    padding: 1rem 0.75rem 0.75rem;
    width: 100%;
  }

  section.gift-item.gift_a {
    padding-left: 5vw;
    font-size: 14px;
}

.section .gift_a h4 {
  padding-right: 5vw;
  padding-left: 0vw;
}


#keepsakes .gift_b p {
  padding-right: 1vw;
  padding-left: 3vw;
}


#keepsakes .gift_c p {
  padding-right: 1vw;
  padding-left: 3vw;
}

#keepsakes .gift_d p {
  padding-right: 1vw;
  padding-left: 3vw;
}
#keepsakes .gift_e p {
  padding-right: 1vw;
  padding-left: 3vw;
}

#keepsakes .gift_f p {
  padding-right: 1vw;
  padding-left: 3vw;
}

  .thumbs {
    gap: 0.5rem;
    margin-top: 0.75rem;
    grid-template-columns: repeat(2, 1fr);
  }

  .thumbs img {
    padding: 0.25rem;
    height: 5rem;
    width: 100%;
    object-fit: contain;
  }

  .thumbs > section{
    position: relative;
  }
  .gift_b .giftcaption{
    left:10vw;

  }

  .gift_c .giftcaption{
    left:3vw;

  }

  #keepsakes .thumbs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

  #keepsakes .gift_b .thumbs {
    grid-template-columns: repeat(2, 1fr);
  }

  section#report{
    padding-left:30px;
  }

  /* 税制優遇 */
  #tax .h3-link a {
    text-decoration-thickness: 0.125rem;
    text-underline-offset: 0.25rem;
    font-size: 0.875rem;
  }

  #tax p {
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    line-height: 1.7;
  }

  /* お問合せ */
  #contact address {
    padding: 1rem 0.75rem;
    line-height: 1.8;
    font-size: 0.875rem;
  }

  /* フッター */
  .site-footer .columns {
    gap: 1rem;
    padding: 1rem 0 1.5rem;
    grid-template-columns: 1fr;
  }

  .site-footer a {
    line-height: 1.8;
    font-size: 0.75rem;
    padding: 0.25rem 0;
    display: block;
  }

  /* ご寄付の方法 */
  #donation-methods {
    padding: 2.5rem 0 3rem;
  }

  #donation-methods h2 {
    font-size: 1.25rem;
    margin: 0 0 0.75rem;
    line-height: 1.3;
  }

  #donation-methods > p {
    margin: 0 0 1rem;
    line-height: 1.7;
    font-size: 0.875rem;
  }

  #donation-methods .donation-summary {
    gap: 1rem;
    padding: 1rem 0.75rem 0.75rem;
    margin: 0.75rem 0 1.5rem;
    grid-template-columns: 1fr;
  }

  #donation-methods .donation-summary dl {
    gap: 0.5rem;
    grid-template-columns: 1fr;
  }

  #donation-methods .donation-summary dt {
    min-width: auto;
    padding: 0.375rem 0.5rem;
    font-size: 0.75rem;
    letter-spacing: 0.125rem;
    text-align: center;
    width: fit-content;
    margin: 0 auto 0.5rem;
  }

  #donation-methods .donation-summary dd {
    font-size: 0.875rem;
    letter-spacing: 0.02em;
    text-align: center;
  }

  #donation-methods .donation-summary dd .note {
    font-size: 0.625rem;
    margin-left: 0;
    margin-top: 0.25rem;
    display: block;
  }

  #donation-methods .donation-summary figure img {
    height: 6rem;
    width: 100%;
    object-fit: cover;
  }

  #donation-methods .donation-box {
    padding: 1rem 0.75rem 0.75rem;
    margin: 0 0 1.5rem;
  }

  #donation-methods .donation-box h3 {
    font-size: 1rem;
    margin: 0 0 0.75rem;
  }

  #donation-methods .donation-box h4 {
    font-size: 0.875rem;
    margin: 0.75rem 0 0.5rem;
  }

  #donation-methods .donation-box p {
    margin: 0 0 0.75rem;
    line-height: 1.7;
    font-size: 0.875rem;
  }

  #donation-methods .donation-box.donation-box--panel p a {
    font-size: 1rem;
  }

  #donation-methods .donation-box ol {
    margin: 0.25rem 0 0.75rem 1.5em;
    font-size: 0.875rem;
  }

  #donation-methods .donation-box ul {
    margin: 0.375rem 0 0.5rem 1.5em;
    font-size: 0.875rem;
  }

  #donation-methods .donation-box .note {
    font-size: 0.875rem;
    margin-left: 0;
    margin-top: 0.5rem;
    display: block;
  }

  #donation-methods .btn-maroon {
    margin-top: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 0.375rem;
    border: 0.125rem solid #8a1d3f;
    font-size: 0.875rem;
    width: 100%;
    text-align: center;
  }

  #donation-methods .notice-box {
    margin-top: 1rem;
    border: 0.125rem solid #8A1C3F;
    padding: 1rem 0.75rem 0.75rem;
  }

  #donation-methods .notice-box strong {
    margin-bottom: 0.5rem;
    display: block;
  }

  /* トップに戻るボタン */
  .back-to-top {
    bottom: 1rem;
    right: 1rem;
    width: 2.5rem;
    height: 2.5rem;
  }
  
  .back-to-top svg {
    width: 1rem;
    height: 1rem;
  }

  /* レスポンシブ調整 */
  @media (max-width: 480px) {
    .inner {
      padding: 0 1rem;
    }
    
    .section {
      padding: 2.5rem 0;
    }
    
    .hero__content {
      padding: 2.5rem 0 3rem;
    }
    
    .hero__content h1 {
      font-size: 1rem;
    }
    
    .hero__content p {
      font-size: 0.8rem;
    }
    
    #appeal .figure img {
      width: 10rem;
    }
    
    .thumbs {
      grid-template-columns: 1fr;
    }
    
    .thumbs img {
      height: 4rem;
    }
  }

  @media (max-width: 360px) {
    .inner {
      padding: 0 0.75rem;
    }
    
    .brand__logo {
      height: 2.25rem;
    }
    
    .header-main {
      gap: 0.75rem;
      padding: 0.375rem 0 0.375rem;
    }
    
    .global-nav a {
      font-size: 0.8rem;
    }
  }
}