/* ==========================================================================
   Booo!GAMES 公式サイト スタイル
   モバイルファースト(375px基準)/ DESIGN.md 準拠
   ========================================================================== */

:root {
  /* 配色(DESIGN.md 2章) */
  --color-bg: #FFF9F0;          /* Cream */
  --color-bg-alt: #FBEFDD;      /* Soft Sand */
  --color-surface: #FFFFFF;     /* Warm White */
  --color-text: #3A2E22;        /* Ink Brown */
  --color-text-sub: #7A6E5F;    /* Warm Gray */
  --color-border: #E8DCC8;      /* Hairline */
  --color-primary: #E8722C;     /* Dice Orange */
  --color-primary-dark: #C85E1F;/* Dice Orange Dark */
  --color-accent: #3E7A5C;      /* Board Green */
  --color-accent-dark: #2E5C45; /* Board Green Dark(バッジ文字) */
  --color-accent-tint: #E6F1EA; /* Board Green Tint */
  --color-highlight: #F4B942;   /* Sunny Yellow */
  --color-alert: #C24A3D;       /* Alert Red */
  --color-info: #3E7A9E;        /* Sky Accent */
  --color-footer-bg: #3A2E22;

  /* タイポグラフィ */
  --font-body: "Zen Maru Gothic", "Hiragino Maru Gothic ProN", "BIZ UDPGothic", sans-serif;

  /* 形状 */
  --radius-card: 12px;
  --radius-pill: 999px;
  --shadow-card: 0 2px 8px rgba(58, 46, 34, 0.08);

  /* レイアウト */
  --max-width: 720px;
}

/* ---------- リセット ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  /* sticky ヘッダー分のアンカーオフセット */
  scroll-padding-top: 64px;
  -webkit-text-size-adjust: 100%;
  /* 意図しない横スクロールを防ぐ最終防波堤 */
  overflow-x: hidden;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
}

h1, h2, h3, p, ul, ol {
  margin: 0;
}

ul, ol {
  padding: 0;
  list-style: none;
}

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

a {
  color: var(--color-accent);
}

/* ---------- 共通コンテナ ---------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 20px;
}

.section {
  padding-block: 48px;
}

.section--alt {
  background-color: var(--color-bg-alt);
}

.section__title {
  font-size: 1.375rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 20px;
  padding-left: 12px;
  border-left: 5px solid var(--color-primary);
}

.section__lead {
  color: var(--color-text-sub);
  margin-bottom: 24px;
}

/* ---------- ボタン ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 48px;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  border: none;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn__arrow {
  font-weight: 700;
}

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

.btn--primary:hover,
.btn--primary:focus-visible {
  background-color: var(--color-primary-dark);
  color: #FFFFFF;
}

.btn--secondary,
.btn--outline {
  background-color: var(--color-surface);
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
}

.btn--secondary:hover,
.btn--secondary:focus-visible,
.btn--outline:hover,
.btn--outline:focus-visible {
  background-color: var(--color-accent-tint);
  color: var(--color-accent-dark);
}

.btn:focus-visible {
  outline: 3px solid var(--color-info);
  outline-offset: 2px;
}

/* ---------- バッジ ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 700;
  line-height: 1.4;
}

.badge--accent {
  background-color: var(--color-accent-tint);
  color: var(--color-accent-dark);
}

.badge--soft {
  background-color: var(--color-accent-tint);
  color: var(--color-accent-dark);
}

.badge--next {
  background-color: var(--color-accent);
  color: #FFFFFF;
}

.badge--highlight {
  background-color: var(--color-highlight);
  color: var(--color-text);
}

/* ==========================================================================
   ヘッダー(4-1)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  max-width: var(--max-width);
  margin-inline: auto;
  height: 56px;
  padding-inline: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--color-text);
  flex-shrink: 1;
  min-width: 0;
}

.site-header__logo {
  width: auto;
  height: 34px;
  /* ロゴ(ワードマーク)は縮小可。ナビのタップ領域を最優先で確保する */
  min-width: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}

.site-nav a {
  padding: 8px 6px;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  border-radius: 8px;
  white-space: nowrap;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--color-primary-dark);
  background-color: var(--color-bg-alt);
}

/* 狭幅では、ナビ3つを必ずタップできるようにロゴを段階的に縮める
   (DESIGN.md: 小画面ではロゴのみ/フォント13px・padding圧縮で収める方針) */
@media (max-width: 389px) {
  .site-header__logo {
    height: 30px;
  }
  .site-nav a {
    padding: 8px 5px;
  }
}

@media (max-width: 339px) {
  .site-header__inner {
    padding-inline: 10px;
  }
  .site-header__logo {
    height: 26px;
  }
  .site-nav a {
    padding: 8px 4px;
    font-size: 0.75rem;
  }
}

/* ==========================================================================
   ヒーロー(4-2)
   ========================================================================== */
.hero {
  background-color: var(--color-bg-alt);
  padding-block: 32px 40px;
}

.hero__inner {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero__badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 16px;
}

.hero__title {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.02em;
}

.hero__sub {
  margin-top: 8px;
  color: var(--color-text-sub);
  font-size: 0.9375rem;
}

.hero__art {
  margin-block: 24px;
  width: 100%;
  max-width: 360px;
}

.hero__art img {
  width: 100%;
  height: auto;
  aspect-ratio: 400 / 300;
}

.hero__cta {
  width: 100%;
  max-width: 400px;
  font-size: 1rem;
  text-align: center;
  padding-block: 14px;
  line-height: 1.4;
}

/* ==========================================================================
   イベントカード(4-3)
   ========================================================================== */
.event-list {
  display: grid;
  gap: 16px;
}

.event-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 20px;
}

.event-card--next {
  border-color: var(--color-accent);
}

.event-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.event-card__date {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
}

.event-card__time {
  font-size: 0.875rem;
  color: var(--color-text-sub);
  margin-top: 2px;
}

.event-card__meta {
  margin-block: 14px;
  display: grid;
  gap: 6px;
  font-size: 0.9375rem;
}

.event-card__meta li {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.event-card__ico {
  flex-shrink: 0;
}

.event-card__cta {
  width: 100%;
  margin-top: 4px;
}

/* 予定0件フォールバック */
.empty-box {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 28px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.empty-box__text {
  font-weight: 700;
  line-height: 1.6;
}

/* ==========================================================================
   はじめての方へ / ステップ(4-4)
   ========================================================================== */
.steps {
  display: grid;
  gap: 0;
  margin-bottom: 24px;
}

.steps__item {
  position: relative;
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 16px;
  padding-bottom: 24px;
}

/* ステップ間の縦連結線 */
.steps__item::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 32px;
  bottom: 0;
  width: 1px;
  background-color: var(--color-border);
}

.steps__item--last::before {
  display: none;
}

.steps__num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: #FFFFFF;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  z-index: 1;
}

.steps__title {
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 2px;
}

.steps__body p {
  font-size: 0.9375rem;
  color: var(--color-text-sub);
}

/* ワンポイント */
.onepoint {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 20px;
  margin-bottom: 32px;
}

.section--alt .onepoint {
  /* alt 背景上ではカードを白より Sand 寄りに(DESIGN.md: Soft Sand背景) */
  background-color: var(--color-bg);
}

.onepoint__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.onepoint__list {
  display: grid;
  gap: 8px;
  font-size: 0.9375rem;
}

.onepoint__list strong {
  color: var(--color-accent-dark);
}

/* ==========================================================================
   FAQ(4-5)
   ========================================================================== */
.faq__heading {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.faq {
  display: grid;
  gap: 0;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

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

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 44px 16px 16px;
  position: relative;
  font-weight: 700;
  font-size: 0.9375rem;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

/* 開閉アイコン(+ / −) */
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-accent);
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item summary:focus-visible {
  outline: 3px solid var(--color-info);
  outline-offset: -3px;
}

.faq-item[open] {
  background-color: var(--color-bg-alt);
}

.faq-item p {
  padding: 0 16px 16px;
  font-size: 0.9375rem;
  color: var(--color-text);
}

.faq-note {
  display: inline-block;
  color: var(--color-alert);
  font-weight: 700;
  margin-right: 4px;
}

/* ==========================================================================
   アクセス(4-6)
   ========================================================================== */
.access-list {
  display: grid;
  gap: 16px;
}

.access-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 20px;
}

.access-card__name {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.access-card__addr {
  font-size: 0.9375rem;
  color: var(--color-text);
}

.access-card__todo {
  color: var(--color-text-sub);
  font-size: 0.8125rem;
}

.access-card__station {
  font-size: 0.9375rem;
  color: var(--color-text-sub);
  margin-top: 4px;
  margin-bottom: 14px;
}

.access-card__map {
  width: 100%;
}

.access-note {
  margin-top: 16px;
  font-size: 0.875rem;
  color: var(--color-text-sub);
}

/* ==========================================================================
   フッター(4-7)
   ========================================================================== */
.site-footer {
  background-color: var(--color-footer-bg);
  color: #FFFFFF;
  padding-block: 40px;
}

.site-footer__inner {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 20px;
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 24px;
}

.site-footer__logo {
  width: auto;
  height: 40px;
}

.site-footer__lead {
  font-size: 0.9375rem;
}

.site-footer__links {
  display: grid;
  gap: 4px;
  margin-bottom: 24px;
}

.site-footer__links a {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 8px 4px;
  color: #FFFFFF;
  text-decoration: none;
  font-size: 0.9375rem;
}

.site-footer__links a:hover,
.site-footer__links a:focus-visible {
  color: var(--color-highlight);
}

.site-footer__icon {
  flex-shrink: 0;
  width: 20px;
  text-align: center;
}

.site-footer__copyright {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.7);
}

/* ==========================================================================
   PC拡張(768px〜)
   ========================================================================== */
@media (min-width: 768px) {
  .hero__title {
    font-size: 2.25rem;
  }

  .section__title {
    font-size: 1.75rem;
  }

  .section {
    padding-block: 80px;
  }

  /* イベントカードは最大2カラム */
  .event-list {
    grid-template-columns: repeat(2, 1fr);
  }

  /* アクセスカードは2カラム */
  .access-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ==========================================================================
   ダークモード(任意対応: 背景反転程度)
   ========================================================================== */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #241E18;
    --color-bg-alt: #2E2620;
    --color-surface: #322A22;
    --color-text: #F3EADD;
    --color-text-sub: #C4B6A4;
    --color-border: #4A3E32;
  }

  .badge--accent,
  .badge--soft {
    background-color: rgba(62, 122, 92, 0.25);
    color: #A9D8BE;
  }

  .btn--secondary,
  .btn--outline {
    background-color: transparent;
  }
}