/* ==========================================================================
   Evolution Track Club - Main Stylesheet
   ========================================================================== */

/* --------------------------------------------------------------------------
   0. CSS Variables & Reset
   -------------------------------------------------------------------------- */
:root {
  /* Color Palette */
  --primary-color: #002244;      /* ディープネイビー */
  --secondary-color: #0052cc;    /* ロイヤルブルー */
  --accent-color: #00aaff;       /* スカイブルー */
  --accent-glow: #00d2ff;        /* ネオンブルー */
  --dark-color: #111111;         /* チャコールブラック */
  --light-bg: #f4f6f9;           /* ライトグレー */
  --white: #ffffff;
  --gray-100: #f8f9fa;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-600: #6c757d;
  --gray-800: #343a40;
  
  /* Font Stack */
  --font-base: 'Inter', 'Noto Sans JP', sans-serif;
  
  /* Transitions */
  --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-fast: all 0.15s ease;
  
  /* Box Shadow */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
  --shadow-md: 0 10px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 15px 30px rgba(0,0,0,0.12);
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-base);
  font-size: 16px;
  line-height: 1.6;
  color: var(--dark-color);
  scroll-behavior: smooth;
  scroll-padding-top: 90px; /* 固定ヘッダーの高さ分、アンカー位置を下げる */
}

body {
  background-color: var(--white);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

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

ul, ol {
  list-style: none;
}

/* --------------------------------------------------------------------------
   1. Typography & Common Layout
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.text-center { text-align: center; }
.text-white { color: var(--white); }
.text-accent { color: var(--accent-color); }
.bg-light { background-color: var(--light-bg); }

/* Section Title */
.section-title-area {
  margin-bottom: 3rem;
  text-align: center;
}

.section-title {
  display: inline-block;
  position: relative;
}

.en-title {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--primary-color);
  line-height: 1.1;
}

.jp-title {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-600);
  margin-top: 0.25rem;
  letter-spacing: 0.05em;
}

.text-white .en-title {
  color: var(--white);
}

.text-white .jp-title {
  color: var(--gray-300);
}

.section-subtitle {
  margin-top: 1rem;
  font-size: 1.1rem;
  color: var(--gray-600);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  padding: 0.9rem 2rem;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition-smooth);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
}

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

.btn-primary:hover {
  background-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: 0 8px 15px rgba(0, 82, 204, 0.3);
}

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

.btn-secondary:hover {
  background-color: var(--secondary-color);
  transform: translateY(-2px);
  box-shadow: 0 8px 15px rgba(0, 34, 68, 0.3);
}

.btn-accent {
  background-color: var(--accent-color);
  color: var(--primary-color);
}

.btn-accent:hover {
  background-color: var(--accent-glow);
  transform: translateY(-2px);
  box-shadow: 0 8px 15px rgba(0, 170, 255, 0.4);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--white);
  color: var(--white);
}

.btn-outline:hover {
  background-color: var(--white);
  color: var(--primary-color);
  transform: translateY(-2px);
}

.btn-outline-white {
  background-color: transparent;
  border-color: var(--white);
  color: var(--white);
}

.btn-outline-white:hover {
  background-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.5rem 1.2rem;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 1.2rem 2.5rem;
  font-size: 1.1rem;
}

.btn-wide {
  min-width: 280px;
}

.center-btn {
  display: flex;
  justify-content: center;
  margin-top: 2.5rem;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  margin-left: 0.5rem;
}

.badge-gold { background-color: #ffd700; color: #333; }
.badge-silver { background-color: #c0c0c0; color: #333; }
.badge-bronze { background-color: #cd7f32; color: #fff; }

/* --------------------------------------------------------------------------
   2. Site Header
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed; /* 常に上部に固定 */
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 0.8rem 0;
  background-color: rgba(0, 34, 68, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition-smooth);
}

.site-header.is-scrolled {
  /* スクロール時の追加変化が必要な場合はここに記述 */
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

.logo a {
  display: flex;
  flex-direction: column;
  color: var(--white);
}

.logo-main {
  font-size: 1.6rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  line-height: 1;
}

.logo-sub {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  color: var(--accent-color);
  margin-top: 0.2rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav-list {
  display: flex;
  gap: 2rem;
}

.nav-link {
  color: var(--white);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  padding: 0.5rem 0;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-color);
  transition: var(--transition-smooth);
}

.nav-link:hover::after {
  width: 100%;
}

.menu-trigger {
  display: none;
}

/* --------------------------------------------------------------------------
   3. Hero Section
   -------------------------------------------------------------------------- */
.hero-section {
  position: relative;
  height: 90vh;
  min-height: 650px;
  display: flex;
  align-items: center;
  color: var(--white);
  padding-top: 80px;
}

.hero-bg-dummy {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: linear-gradient(135deg, var(--primary-color) 30%, #004488 100%);
  overflow: hidden;
}

.hero-bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 15, 30, 0.45);
}

/* 競技場トラックを模したCSSグラフィック */
.hero-bg-graphic {
  position: absolute;
  bottom: -10%;
  right: -10%;
  width: 80%;
  height: 100%;
  border-radius: 50%;
  border: 15px solid rgba(255, 255, 255, 0.04);
  transform: rotate(-15deg);
}

.hero-bg-graphic::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 40px;
  right: 40px;
  bottom: 40px;
  border-radius: 50%;
  border: 10px solid rgba(255, 255, 255, 0.03);
}

.hero-bg-graphic::after {
  content: '';
  position: absolute;
  top: 80px;
  left: 80px;
  right: 80px;
  bottom: 80px;
  border-radius: 50%;
  border: 8px dashed rgba(255, 255, 255, 0.02);
}

.hero-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hero-content {
  max-width: 750px;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 1.5rem;
  letter-spacing: 0.02em;
}

.hero-title .highlight {
  color: var(--accent-color);
  position: relative;
  display: inline-block;
}

.hero-lead {
  font-size: 1.15rem;
  line-height: 1.8;
  margin-bottom: 2.5rem;
  color: var(--gray-200);
}

.hero-actions {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
}

/* 斜めの切り欠きデコレーション */
.hero-skew-deco {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100px;
  background-color: var(--white);
  clip-path: polygon(0 100%, 100% 100%, 100% 100%, 0 0);
  z-index: 2;
}

/* --------------------------------------------------------------------------
   4. Common Card & Grids
   -------------------------------------------------------------------------- */
.card-grid {
  display: grid;
  gap: 2rem;
}

.col-3 {
  grid-template-columns: repeat(3, 1fr);
}

.col-2 {
  grid-template-columns: repeat(2, 1fr);
}

.card {
  background-color: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
  border: 1px solid var(--gray-200);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.card-image-wrapper {
  position: relative;
  overflow: hidden;
}

.card-content {
  padding: 1.5rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--primary-color);
}

.card-text {
  font-size: 0.95rem;
  color: var(--gray-600);
  line-height: 1.6;
}

/* プレミアムダミー画像システム */
.dummy-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--gray-200) 0%, var(--gray-300) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: var(--transition-smooth);
}

.card:hover .dummy-image {
  transform: scale(1.05);
}

.dummy-image-label {
  font-family: var(--font-base);
  font-weight: 800;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.85);
  background-color: rgba(0, 0, 0, 0.15);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-sm);
  text-shadow: 0 2px 4px rgba(0,0,0,0.1);
  text-transform: uppercase;
}

/* 種目紹介用のグラデーション着色 */
.sport-sprint { background: linear-gradient(135deg, #ff5f6d 0%, #ffc371 100%); }
.sport-middle { background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%); }
.sport-hurdles { background: linear-gradient(135deg, #8a2387 0%, #e94057 100%, #f27121 100%); }
.sport-longjump { background: linear-gradient(135deg, #00b4db 0%, #0083b0 100%); }
.sport-highjump { background: linear-gradient(135deg, #f857a6 0%, #ff5858 100%); }
.sport-throws { background: linear-gradient(135deg, #4776e6 0%, #8e54e9 100%); }

/* 練習拠点用のグラデーション着色 */
.base-kawaguchi { background: linear-gradient(135deg, #56ab2f 0%, #a8e063 100%); }
.base-toda { background: linear-gradient(135deg, #2193b0 0%, #6dd5ed 100%); }
.base-toneri { background: linear-gradient(135deg, #7f00ff 0%, #e100ff 100%); }
.base-road { background: linear-gradient(135deg, #373b44 0%, #4286f4 100%); }

/* ブログ用のグラデーション */
.blog-1 { background: linear-gradient(135deg, #606c88 0%, #3f4c6b 100%); }
.blog-2 { background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%); }
.blog-3 { background: linear-gradient(135deg, #4b6cb7 0%, #182848 100%); }

/* コーチ用の縦長・スクエアダミー画像 */
.coach-card .dummy-image {
  aspect-ratio: 4 / 3;
}
.coach-1 { background: linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%); }
.coach-2 { background: linear-gradient(135deg, #1d2671 0%, #c33764 100%); }
.coach-3 { background: linear-gradient(135deg, #134e5e 0%, #71b280 100%); }

/* --------------------------------------------------------------------------
   5. Sections
   -------------------------------------------------------------------------- */
section {
  padding: 6rem 0;
}

/* --- RESULT 大会結果 --- */
.result-section {
  background-color: var(--white);
}

.achievement-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.achievement-card {
  background-color: var(--light-bg);
  padding: 2rem;
  border-radius: var(--radius-md);
  text-align: center;
  border: 1px solid var(--gray-200);
}

.achievement-label {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 0.5rem;
}

.achievement-number,
.achievement-numberHighlight {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1;
  font-family: 'Inter', sans-serif;
  color: var(--primary-color);
}

.achievement-numberHighlight {
  color: var(--secondary-color);
}

.achievement-number .unit,
.achievement-numberHighlight .unit {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--dark-color);
  margin-left: 0.2rem;
}

.achievement-note {
  text-align: right;
  font-size: 0.8rem;
  color: var(--gray-600);
  margin-bottom: 3rem;
}

.result-list-container {
  background-color: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.result-list {
  display: flex;
  flex-direction: column;
}

.result-item {
  display: flex;
  align-items: center;
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--gray-200);
}

.result-item:last-child {
  border-bottom: none;
}

.result-date {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  color: var(--gray-600);
  width: 120px;
  flex-shrink: 0;
}

.result-category {
  font-weight: 700;
  color: var(--primary-color);
  width: 300px;
  flex-shrink: 0;
}

.result-detail {
  flex-grow: 1;
}

/* --- NEXT RACE 今後の大会予定 --- */
.next-race-section {
  position: relative;
  background-color: var(--primary-color);
  overflow: hidden;
  z-index: 1;
  color: var(--white);
}

/* 斜めの背景ストライプグラフィック */
.next-race-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 120%;
  height: 100%;
  background: linear-gradient(115deg, rgba(0, 82, 204, 0.4) 0%, rgba(0, 170, 255, 0.1) 70%);
  transform: skewX(-10deg) translateX(-10%);
  z-index: -1;
}

.race-list-container {
  max-width: 900px;
  margin: 0 auto 3rem auto;
}

.race-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.race-item {
  display: flex;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.08);
  padding: 1.5rem 2.5rem;
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--accent-color);
  backdrop-filter: blur(5px);
  transition: var(--transition-smooth);
}

.race-item:hover {
  background-color: rgba(255, 255, 255, 0.15);
  transform: translateX(5px);
}

.race-date {
  font-family: 'Inter', sans-serif;
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--accent-color);
  width: 140px;
  flex-shrink: 0;
}

.race-info {
  font-weight: 700;
  font-size: 1.05rem;
}

.race-venue {
  font-weight: 400;
  color: var(--gray-300);
}

/* --- BASE 練習拠点 --- */
.base-card.horizontal {
  display: flex;
  height: 200px;
}

.base-card.horizontal .card-image-wrapper {
  width: 40%;
  flex-shrink: 0;
}

.base-card.horizontal .dummy-image {
  height: 100%;
}

.base-card.horizontal .card-content {
  width: 60%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1.5rem 2rem;
}

.base-title {
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.marker-icon {
  font-size: 1.2rem;
}

.base-address {
  font-size: 0.9rem;
  color: var(--gray-600);
  margin-top: 0.5rem;
}

.base-features {
  display: flex;
  gap: 0.5rem 1rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.base-features li {
  font-size: 0.9rem;
  background-color: var(--light-bg);
  padding: 0.2rem 0.8rem;
  border-radius: 20px;
  color: var(--primary-color);
  font-weight: 500;
}

/* --- BLOG ブログ --- */
.blog-card .card-content {
  padding: 1.25rem 1.5rem;
}

.blog-title {
  font-size: 1.1rem;
  line-height: 1.4;
  margin-bottom: 0.5rem;
}

.blog-title a:hover {
  color: var(--secondary-color);
}

.blog-meta {
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  color: var(--gray-600);
}

/* --- COACH 指導者紹介 --- */
.coach-card {
  text-align: center;
}

.coach-card .card-content {
  padding: 2rem 1.5rem;
}

.coach-role {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--secondary-color);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.25rem;
}

.coach-name {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.coach-bio {
  text-align: left;
  font-size: 0.9rem;
}

/* --- CONTACT お問い合わせ（簡易CTA） --- */
.contact-section {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: var(--white);
  padding: 8rem 0;
  position: relative;
  overflow: hidden;
}

.contact-section::after {
  content: '';
  position: absolute;
  top: -20%;
  left: -20%;
  width: 60%;
  height: 150%;
  background-color: rgba(255,255,255,0.02);
  transform: rotate(30deg);
}

.contact-title {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 1.5rem;
}

.contact-lead {
  font-size: 1.15rem;
  max-width: 700px;
  margin: 0 auto 3rem auto;
  color: var(--gray-300);
}

.contact-actions {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

/* --- FOOTER --- */
.site-footer {
  background-color: var(--dark-color);
  color: var(--white);
  padding: 3rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-logo {
  font-size: 1.2rem;
  font-weight: 900;
  letter-spacing: 0.05em;
}

.copyright {
  font-size: 0.85rem;
  color: var(--gray-600);
}

/* --- SCHEDULE 練習日・会場 --- */
.schedule-section {
  background-color: var(--white);
}

.calendar-wrapper {
  position: relative;
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-200);
  background-color: var(--white);
  height: 650px;
}

.google-calendar-iframe {
  width: 100%;
  height: 100%;
}

/* --------------------------------------------------------------------------
   6. Responsive Styles (Media Queries)
   -------------------------------------------------------------------------- */

/* Tablet View (max-width: 1024px) */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.8rem;
  }
  
  .col-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile Layouts (max-width: 768px) */
@media (max-width: 768px) {
  section {
    padding: 4rem 0;
  }
  
  /* Header Navigation */
  .site-header {
    background-color: rgba(0, 34, 68, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .header-container {
    padding: 0 1.5rem;
  }
  
  .logo-main {
    font-size: 1.4rem;
  }
  
  .nav-menu {
    position: fixed;
    top: 70px; /* Header height */
    left: 100%;
    width: 100%;
    height: calc(100vh - 70px);
    background-color: var(--primary-color);
    flex-direction: column;
    gap: 2rem;
    padding: 3rem 1.5rem;
    transition: var(--transition-smooth);
    overflow-y: auto;
  }
  
  .nav-menu.is-active {
    left: 0;
  }
  
  .nav-list {
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
  }
  
  .nav-link {
    font-size: 1.2rem;
  }
  
  .nav-cta {
    width: 100%;
    max-width: 300px;
    margin-top: 1rem;
  }
  
  .nav-cta .btn {
    width: 100%;
  }
  
  /* Hamburger Button */
  .menu-trigger {
    display: block;
    width: 30px;
    height: 24px;
    position: relative;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 101;
  }
  
  .menu-trigger span {
    display: block;
    position: absolute;
    width: 100%;
    height: 2px;
    background-color: var(--white);
    border-radius: 2px;
    transition: var(--transition-smooth);
  }
  
  .menu-trigger span:nth-child(1) { top: 0; }
  .menu-trigger span:nth-child(2) { top: 11px; }
  .menu-trigger span:nth-child(3) { top: 22px; }
  
  .menu-trigger.is-active span:nth-child(1) {
    transform: translateY(11px) rotate(45deg);
  }
  
  .menu-trigger.is-active span:nth-child(2) {
    opacity: 0;
  }
  
  .menu-trigger.is-active span:nth-child(3) {
    transform: translateY(-11px) rotate(-45deg);
  }
  
  /* Hero Section */
  .hero-section {
    height: auto;
    min-height: 100vh;
    padding-top: 120px;
    padding-bottom: 60px;
  }
  
  .hero-title {
    font-size: 2.2rem;
    line-height: 1.4;
  }
  
  .hero-lead {
    font-size: 1rem;
    margin-bottom: 2rem;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
  
  /* Result Section */
  .achievement-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .achievement-card {
    padding: 1.5rem;
  }
  
  .result-item {
    flex-direction: column;
    align-items: flex-start;
    padding: 1.25rem 1.5rem;
    gap: 0.5rem;
  }
  
  .result-date {
    width: auto;
  }
  
  .result-category {
    width: auto;
  }
  
  /* Next Race Section */
  .race-item {
    flex-direction: column;
    align-items: flex-start;
    padding: 1.25rem 1.5rem;
    gap: 0.5rem;
  }
  
  .race-date {
    width: auto;
  }
  
  /* Grids and Cards */
  .col-3, .col-2 {
    grid-template-columns: 1fr;
  }
  
  /* Base Horizontal Cards on Mobile */
  .base-card.horizontal {
    flex-direction: column;
    height: auto;
  }
  
  .base-card.horizontal .card-image-wrapper {
    width: 100%;
    aspect-ratio: 16 / 9;
  }
  
  .base-card.horizontal .card-content {
    width: 100%;
    padding: 1.5rem;
  }
  
  /* Contact Section */
  .contact-section {
    padding: 5rem 0;
  }
  
  .contact-title {
    font-size: 1.8rem;
  }
  
  .contact-lead {
    font-size: 1rem;
  }
  
  .contact-actions {
    flex-direction: column;
  }
  
  .contact-actions .btn {
    width: 100%;
  }
  
  /* Footer */
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  
  /* Schedule Section Mobile */
  .calendar-wrapper {
    height: 480px; /* モバイルでは高さを抑えて操作性を向上 */
  }
}