/* 大日本帝国南方軍シンガポール基地 - メインCSS */

/* =============================================================================
   CSS変数定義 (ルート)
   ========================================================================== */
:root {
  /* カラーパレット */
  --color-primary: #ffd700; /* プライマリカラー (金) */
  --color-primary-light: #ffed4a; /* プライマリカラー (明) */
  --color-text: #f5f5f5; /* 基本テキストカラー */
  --color-text-muted: #bbb; /* 補助テキストカラー */
  --color-background: #000; /* 背景色 */
  --color-surface: #111; /* コンテンツ背景色 */
  --color-surface-gradient: linear-gradient(135deg, #111, #1a1a1a);
  --color-border: #333; /* 境界線カラー */

  /* タイポグラフィ */
  --font-family-base: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.7;

  /* その他 */
  --border-radius-base: 6px;
  --transition-duration: 0.3s;
}

/* =============================================================================
   基本スタイル・リセット
   ========================================================================== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-family-base);
  background: var(--color-background);
  color: var(--color-text);
  line-height: var(--line-height-base);
  font-size: var(--font-size-base);
  text-shadow: 0 0 1px rgba(255, 255, 255, 0.1);
}

/* =============================================================================
   ヘッダー
   ========================================================================== */
header {
  display: flex;
  align-items: center;
  background: var(--color-surface-gradient);
  padding: 15px 25px;
  border-block-end: 3px solid var(--color-primary);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.flag-title {
  display: flex;
  align-items: center;
  flex: 2;
}

.flag-title img {
  height: 80px;
  width: auto;
  margin-inline-end: 15px;
  border-radius: 4px;
  box-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
}

.site-title {
  font-size: clamp(20px, 3vw, 28px);
  color: var(--color-text);
  text-shadow: 0 0 3px rgba(255, 255, 255, 0.3);
  font-weight: 700;
}

/* =============================================================================
   ナビゲーション
   ========================================================================== */
.links {
  flex: 3;
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  flex-wrap: wrap;
}

.links a {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-background);
  text-decoration: none;
  padding: 10px 16px;
  border-radius: var(--border-radius-base);
  font-weight: 500;
  font-size: 14px;
  transition: transform var(--transition-duration) ease, 
              box-shadow var(--transition-duration) ease, 
              background var(--transition-duration) ease;
}

.links a:hover, .links a:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255, 215, 0, 0.4);
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
}

/* =============================================================================
   パンくずリスト
   ========================================================================== */
.breadcrumb {
  font-size: 14px;
  color: var(--color-text-muted);
  background: rgba(17, 17, 17, 0.8);
  padding-block: 10px;
}

.breadcrumb .container {
  max-width: 1000px;
  margin-inline: auto;
  padding-inline: 30px;
}

.breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-duration) ease;
}

.breadcrumb a:hover, .breadcrumb a:focus-visible {
  text-decoration: underline;
  color: var(--color-primary-light);
}

/* =============================================================================
   メインコンテンツ
   ========================================================================== */
.main-container {
  max-width: 1000px;
  margin: 40px auto;
  padding: 30px;
  background: var(--color-surface-gradient);
  border-inline-start: 5px solid var(--color-primary);
  border-radius: 8px;
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
}

section {
  margin-block-end: 50px;
  padding-block: 20px;
}

section:not(:last-child) {
  border-block-end: 1px solid var(--color-border);
}

/* 見出し */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary);
  font-weight: 700;
  margin-block-end: 20px;
}

h2 {
  font-size: clamp(24px, 4vw, 32px);
  border-block-end: 2px solid var(--color-primary);
  padding-block-end: 10px;
}

h3 {
  font-size: clamp(20px, 3vw, 24px);
  margin-block: 25px 15px;
}

/* テキスト・リスト */
p {
  font-size: var(--font-size-base);
  line-height: 1.8;
  margin-block-end: 20px;
  color: #e0e0e0;
}

ul, ol {
  font-size: var(--font-size-base);
  line-height: 1.8;
  padding-inline-start: 20px;
  margin-block-end: 20px;
}

li {
  margin-block-end: 8px;
}

/* 汎用リンク */
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-duration) ease;
}

a:hover, a:focus-visible {
  color: var(--color-primary-light);
  text-decoration: underline;
}

/* =============================================================================
   コンポーネント
   ========================================================================== */

/* 記事リスト */
.article-list {
  max-height: 500px;
  overflow-y: auto;
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-base);
  background: rgba(0, 0, 0, 0.3);
}

.article-list::-webkit-scrollbar { width: 8px; }
.article-list::-webkit-scrollbar-track { background: #222; border-radius: 4px; }
.article-list::-webkit-scrollbar-thumb { background: var(--color-primary); border-radius: 4px; }
.article-list::-webkit-scrollbar-thumb:hover { background: var(--color-primary-light); }

.article-item {
  padding-block: 15px;
}
.article-item:not(:last-child) {
  border-block-end: 1px solid var(--color-border);
}

.article-item h3 a {
  font-size: 1.2em;
  font-weight: 500;
  color: var(--color-text);
  display: block;
  margin-block-end: 8px;
  transition: color var(--transition-duration) ease, transform var(--transition-duration) ease;
}

.article-item h3 a:hover, .article-item h3 a:focus-visible {
  color: var(--color-primary);
  transform: translateX(10px);
  text-decoration: underline;
}

.article-item .date {
  font-size: 14px;
  color: #888;
  font-style: italic;
}

/* FAQセクション */
.faq-list {
  display: grid;
  gap: 20px;
}

.faq-item {
  background: rgba(255, 215, 0, 0.03);
  border-inline-start: 4px solid var(--color-primary);
  padding: 20px;
  border-radius: var(--border-radius-base);
}

.faq-item h3 {
  color: var(--color-primary);
  font-size: 1.2em;
  margin-block-end: 10px;
}

.faq-item p {
  color: #e0e0e0;
  margin: 10px 0 0;
}

/* CTA (Call to Action) */
.cta-box {
  background: rgba(255, 215, 0, 0.1);
  border-inline-start: 5px solid var(--color-primary);
  padding: 25px;
  border-radius: var(--border-radius-base);
  margin-block-start: 30px;
  text-align: center;
}

.cta-box h3 {
  font-size: 1.4em;
  color: var(--color-primary);
  margin-block-end: 10px;
}

.cta-box p {
  margin-block-end: 15px;
}

.cta-button {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-background);
  padding: 12px 24px;
  border-radius: var(--border-radius-base);
  font-weight: bold;
  font-size: var(--font-size-base);
  text-decoration: none;
  transition: transform var(--transition-duration) ease, box-shadow var(--transition-duration) ease;
  display: inline-block;
}

.cta-button:hover, .cta-button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255, 215, 0, 0.3);
}

/* =============================================================================
   フッター
   ========================================================================== */
footer {
  background: var(--color-surface);
  padding: 20px;
  text-align: center;
  border-block-start: 1px solid var(--color-border);
  margin-block-start: 40px;
  color: var(--color-text-muted);
}

footer p {
  font-size: 14px;
  margin: 0;
}

/* =============================================================================
   レスポンシブデザイン
   ========================================================================== */
@media (max-width: 768px) {
  header {
    flex-direction: column;
    gap: 15px;
    text-align: center;
    padding: 20px 15px;
  }

  .flag-title {
    justify-content: center;
    flex: none;
  }

  .flag-title img {
    height: 60px;
  }

  .links {
    justify-content: center;
    flex: none;
  }

  .main-container, .breadcrumb .container {
    margin-inline: 10px;
    padding: 20px;
  }

  .article-list {
    max-height: 300px;
    padding: 15px;
  }
}

@media (max-width: 480px) {
  .links a {
    padding: 8px 12px;
    font-size: 13px;
  }

  .site-title {
    font-size: 18px;
  }

  .main-container {
    padding: 15px;
  }

  section {
    margin-block-end: 30px;
    padding-block: 15px;
  }

  .cta-button {
    font-size: 14px;
    padding: 10px 16px;
  }
}

/* =============================================================================
   アクセシビリティ
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

a:focus-visible, button:focus-visible, input:focus-visible, 
textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-contrast: high) {
  body, .main-container {
    background: #000;
    color: #fff;
  }

  .main-container {
    border: 2px solid var(--color-primary);
  }

  a, h1, h2, h3, h4, h5, h6 {
    color: #ffff00;
  }
}

/* =============================================================================
   印刷スタイル
   ========================================================================== */
@media print {
  body, header, .main-container {
    background: #fff;
    color: #000;
    text-shadow: none;
  }

  header {
    border-block-end: 2px solid #000;
  }

  .main-container {
    border-inline-start: 3px solid #000;
    box-shadow: none;
  }

  .links, .cta-box {
    display: none;
  }

  a, h1, h2, h3, h4, h5, h6 {
    color: #000;
  }

  a {
    text-decoration: underline;
  }
}