/* ================================================
   common.css — CSS変数・リセット・ユーティリティ
   ================================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&family=Zen+Maru+Gothic:wght@400;500;700&display=swap');

:root {
  --river-blue: #2a73a9;
  --river-blue-dark: #1f5c87;
  --forest-green: #3d8c62;
  --forest-green-dark: #2f6c4c;
  --sunset-orange: #e07e34;
  --sunset-orange-dark: #be6727;

  --bg-white: #ffffff;
  --bg-cream: #f8f6f1;
  --bg-light-blue: #eaf3fa;
  --bg-light-green: #edf5f0;
  --bg-soft: #f9fbfd;

  --text-dark: #1a2f3f;
  --text-sub: #4f6475;
  --text-white: #ffffff;
  --text-link: var(--river-blue);
  --border-light: #dbe6ef;

  --font-heading: "Zen Maru Gothic", "Hiragino Maru Gothic ProN", sans-serif;
  --font-body: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;

  --section-padding: 110px 0;
  --container-width: 1140px;
  --container-padding: 0 24px;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 36px;
  --radius-pill: 999px;
  --radius-stadium: 220px;

  --transition-fast: 0.2s ease;
  --transition-base: 0.35s ease;
  --transition-slow: 0.55s ease;

  --shadow-sm: 0 8px 22px rgba(20, 52, 81, 0.08);
  --shadow-md: 0 14px 34px rgba(20, 52, 81, 0.12);
  --shadow-lg: 0 22px 54px rgba(20, 52, 81, 0.16);

  --header-height: 82px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.9;
  color: var(--text-dark);
  background: linear-gradient(180deg, #ffffff 0%, #f8fbfe 100%);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--river-blue-dark);
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.01em;
  color: var(--text-dark);
}

p {
  overflow-wrap: anywhere;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--container-padding);
}

.section {
  padding: var(--section-padding);
}

.section-title {
  font-size: clamp(1.75rem, 2.8vw, 2.35rem);
  line-height: 1.4;
  margin-bottom: 14px;
}

.section-subtitle {
  color: var(--text-sub);
  font-size: 1.02rem;
  line-height: 1.95;
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading {
  margin-bottom: 48px;
}

.section-heading__en {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sunset-orange);
  margin-bottom: 8px;
}

.section-heading__en::before {
  content: "";
  width: 24px;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}

.section-heading__ja {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(1.7rem, 3vw, 2.15rem);
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.45;
}

.section-heading__dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--sunset-orange);
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: middle;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 32px;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.4;
  transition: transform var(--transition-fast), box-shadow var(--transition-base), background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.btn--primary {
  color: var(--text-white);
  background: linear-gradient(120deg, var(--sunset-orange) 0%, #e58b3f 100%);
  box-shadow: 0 10px 24px rgba(224, 126, 52, 0.26);
}

.btn--primary:hover {
  color: var(--text-white);
  background: linear-gradient(120deg, var(--sunset-orange-dark) 0%, #cf7533 100%);
  transform: translateY(-2px);
}

.btn--outline {
  color: var(--river-blue);
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(42, 115, 169, 0.45);
}

.btn--outline:hover {
  color: var(--text-white);
  background: var(--river-blue);
  border-color: var(--river-blue);
  transform: translateY(-2px);
}

.btn--white {
  background: var(--bg-white);
  color: var(--text-dark);
  border: 1px solid rgba(16, 56, 88, 0.12);
}

.btn--white:hover {
  color: var(--text-dark);
  background: #f4f7fa;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.btn--lg {
  min-height: 56px;
  padding: 16px 40px;
  font-size: 1.05rem;
}

.btn__arrow {
  transition: transform var(--transition-fast);
}

.btn:hover .btn__arrow {
  transform: translateX(4px);
}

.card {
  background: var(--bg-white);
  border: 1px solid rgba(26, 68, 105, 0.12);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-fast);
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(42, 115, 169, 0.3);
  box-shadow: var(--shadow-md);
}

.card__image {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.card__body {
  padding: 24px;
}

.card__tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 8px;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  background: var(--bg-light-blue);
  color: var(--river-blue-dark);
}

.card__title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.card__text {
  font-size: 0.94rem;
  color: var(--text-sub);
  line-height: 1.8;
}

.card__date {
  font-size: 0.8rem;
  color: var(--text-sub);
  margin-bottom: 6px;
}

.stadium {
  border-radius: var(--radius-stadium);
  overflow: hidden;
}

.stadium-img {
  border-radius: var(--radius-stadium);
  object-fit: cover;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1024px) {
  :root {
    --section-padding: 84px 0;
    --container-padding: 0 20px;
    --header-height: 72px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 64px 0;
    --container-padding: 0 16px;
    --header-height: 64px;
  }

  .section-heading {
    margin-bottom: 34px;
  }

  .section-subtitle {
    font-size: 0.95rem;
    margin-bottom: 24px;
  }

  .btn {
    min-height: 46px;
    padding: 11px 24px;
    font-size: 0.93rem;
  }

  .btn--lg {
    min-height: 50px;
    padding: 12px 28px;
    font-size: 0.96rem;
  }
}