/* ============================================================
   AETHER FRAME - シナリオ・世界観紹介ページ用CSS (lore.css)
   ダークSFテーマ / ゲーム公式サイト風
   ============================================================ */

/* --- カラーパレット（カスタムプロパティ） --- */
:root {
  --lore-bg-main: #1a1f2e;
  --lore-bg-alt: #1e2538;
  --lore-text: #e8ecf4;
  --lore-text-muted: #8a9ab8;
  --lore-accent-cyan: #4ecdc4;
  --lore-accent-red: #ff6b6b;
  --lore-accent-purple: #9966ff;
  --lore-accent-gold: #ffd700;
  --lore-card-bg: #212836;
  --lore-card-border: #3a4560;
  --lore-card-hover-border: #4ecdc4;
  --lore-footer-bg: #161b28;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', 'Meiryo', sans-serif;
  background: var(--lore-bg-main);
  color: var(--lore-text);
  line-height: 1.6;
  overflow-x: hidden;
  background-image:
    radial-gradient(circle at 25% 25%, rgba(78,205,196,0.03) 0%, transparent 50%),
    radial-gradient(circle at 75% 75%, rgba(153,102,255,0.03) 0%, transparent 50%),
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* ============================================================
   1. ナビゲーション（固定ヘッダー）
   ============================================================ */
.lore-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 60px;
  background: rgba(10, 14, 23, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  border-bottom: 1px solid rgba(42, 48, 64, 0.5);
}

.lore-nav-logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--lore-accent-cyan);
  letter-spacing: 0.15em;
  white-space: nowrap;
}

.lore-nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.lore-nav-links a {
  font-size: 0.9rem;
  color: var(--lore-text-muted);
  letter-spacing: 0.05em;
  position: relative;
  transition: color 0.3s ease;
}

/* ナビリンクのホバー下線アニメーション */
.lore-nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--lore-accent-cyan);
  transition: width 0.3s ease;
}

.lore-nav-links a:hover {
  color: var(--lore-accent-cyan);
}

.lore-nav-links a:hover::after {
  width: 100%;
}

/* ============================================================
   2. ヒーローセクション
   ============================================================ */
.lore-hero {
  position: relative;
  width: 100%;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background-size: cover;
  background-position: center 30%;
  background-repeat: no-repeat;
  padding: 0 20px;
}

.lore-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(10, 14, 23, 0.3) 0%,
    rgba(10, 14, 23, 0.1) 30%,
    rgba(10, 14, 23, 0.4) 70%,
    rgba(26, 31, 46, 0.95) 100%
  );
  z-index: 1;
}

.lore-hero-logo {
  position: relative;
  z-index: 2;
  max-width: 560px;
  width: 80%;
  height: auto;
  margin-bottom: 24px;
  filter: drop-shadow(0 0 30px rgba(78, 205, 196, 0.4))
          drop-shadow(0 4px 20px rgba(0, 0, 0, 0.6));
  animation: lore-logo-glow 3s ease-in-out infinite alternate;
}

@keyframes lore-logo-glow {
  from { filter: drop-shadow(0 0 20px rgba(78, 205, 196, 0.3)) drop-shadow(0 4px 20px rgba(0, 0, 0, 0.6)); }
  to   { filter: drop-shadow(0 0 40px rgba(78, 205, 196, 0.6)) drop-shadow(0 4px 20px rgba(0, 0, 0, 0.6)); }
}

.lore-hero-title {
  font-size: 4rem;
  font-weight: 900;
  letter-spacing: 0.3em;
  color: var(--lore-accent-cyan);
  text-shadow: 0 0 60px rgba(78, 205, 196, 0.3),
               0 0 120px rgba(78, 205, 196, 0.1);
  margin-bottom: 16px;
  line-height: 1.2;
}

.lore-hero-catchcopy {
  position: relative;
  z-index: 2;
  font-size: 1.5rem;
  color: #fff;
  margin-bottom: 12px;
  font-weight: 500;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.8);
}

.lore-hero-sub {
  position: relative;
  z-index: 2;
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
  line-height: 1.8;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.8);
}

/* ============================================================
   3. セクション共通
   ============================================================ */
.lore-section {
  padding: 80px 0;
}

/* 背景色の交互切り替え */
.lore-section--alt {
  background: var(--lore-bg-alt);
}

.lore-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

/* セクション見出し (h2): 左にシアンの縦線ボーダー */
.lore-section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--lore-text);
  padding-left: 20px;
  border-left: 4px solid var(--lore-accent-cyan);
  margin-bottom: 40px;
  letter-spacing: 0.1em;
}

/* サブセクション見出し (h3) */
.lore-section-subtitle {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--lore-accent-cyan);
  margin-bottom: 20px;
  margin-top: 40px;
}

/* ============================================================
   4. WORLD セクション
   ============================================================ */

/* 本文パラグラフ */
.lore-world-text {
  line-height: 1.8;
  color: var(--lore-text);
  margin-bottom: 24px;
  font-size: 1rem;
}

/* 勢力カード: 3列グリッド */
.lore-faction-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.lore-faction-card {
  background: var(--lore-card-bg);
  border: 1px solid var(--lore-card-border);
  border-radius: 8px;
  padding: 24px;
  transition: all 0.3s ease;
  /* 上ボーダーは各勢力ごとに個別指定 */
  border-top: 3px solid var(--lore-card-border);
}

.lore-faction-card:hover {
  border-color: var(--lore-card-hover-border);
  transform: translateY(-2px);
}

/* 各勢力の上ボーダーカラー */
.lore-faction-card--aegis {
  border-top-color: var(--lore-accent-cyan);
}

.lore-faction-card--crimson {
  border-top-color: var(--lore-accent-red);
}

.lore-faction-card--phantom {
  border-top-color: var(--lore-accent-purple);
}

.lore-faction-card h4 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--lore-text);
}

.lore-faction-card p {
  font-size: 0.95rem;
  color: var(--lore-text-muted);
  line-height: 1.7;
}

/* テクノロジー説明: カード内インセットボックス */
.lore-tech-inset {
  background: rgba(13, 20, 32, 0.6);
  border: 1px solid var(--lore-card-border);
  border-radius: 6px;
  padding: 16px 20px;
  margin-top: 16px;
  font-size: 0.9rem;
  color: var(--lore-text-muted);
  line-height: 1.7;
}

/* ============================================================
   5. CHARACTER セクション
   ============================================================ */

/* グループタブバー */
.lore-tab-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--lore-card-border) transparent;
  padding-bottom: 4px;
}

.lore-tab-btn {
  background: var(--lore-card-bg);
  border: 1px solid var(--lore-card-border);
  border-radius: 6px;
  color: var(--lore-text-muted);
  padding: 10px 24px;
  font-size: 0.9rem;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.3s ease;
  position: relative;
}

.lore-tab-btn:hover {
  background: #1c2230;
  color: var(--lore-text);
}

/* アクティブタブ: シアンテキスト + 下線 */
.lore-tab-btn.active {
  color: var(--lore-accent-cyan);
  border-color: var(--lore-accent-cyan);
  background: rgba(78, 205, 196, 0.08);
}

.lore-tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 2px;
  background: var(--lore-accent-cyan);
}

/* タブコンテンツ */
.lore-tab-content {
  display: none;
}

.lore-tab-content.active {
  display: block;
}

/* キャラクターカード: 縦型レイアウト（立ち絵対応） */
.lore-character-card {
  display: flex;
  flex-direction: column;
  background: var(--lore-card-bg);
  border: 1px solid var(--lore-card-border);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 20px;
  transition: all 0.3s ease;
}

.lore-character-card:hover {
  border-color: var(--lore-card-hover-border);
  transform: translateY(-2px);
}

/* キャラクター立ち絵表示エリア */
.lore-character-visual {
  position: relative;
  display: flex;
  justify-content: center;
  padding: 20px;
  background: linear-gradient(135deg, rgba(78,205,196,0.05), rgba(153,102,255,0.05));
  min-height: 300px;
}

/* キャラクター画像（立ち絵対応） */
.lore-character-img {
  width: auto;
  max-height: 400px;
  object-fit: contain;
  border-radius: 8px;
}

/* キャラクター情報テキスト */
.lore-character-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 20px;
}

.lore-character-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--lore-accent-cyan);
  margin-bottom: 4px;
}

.lore-character-role {
  font-size: 0.85rem;
  color: var(--lore-text-muted);
  margin-bottom: 12px;
}

.lore-character-desc {
  font-size: 0.95rem;
  color: var(--lore-text);
  line-height: 1.7;
  margin-bottom: 12px;
}

/* 搭乗機バッジ */
.lore-character-mech {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--lore-accent-cyan);
  background: rgba(78, 205, 196, 0.1);
  border: 1px solid rgba(78, 205, 196, 0.3);
  border-radius: 4px;
  padding: 4px 12px;
}

/* --- 好き/嫌い表示 --- */
.lore-character-likes {
  margin-top: 12px;
  padding: 12px;
  background: rgba(0,0,0,0.2);
  border-radius: 8px;
  font-size: 0.85rem;
}

.lore-likes-row {
  display: flex;
  gap: 12px;
  margin-bottom: 6px;
  align-items: flex-start;
}

.lore-likes-row:last-child {
  margin-bottom: 0;
}

.lore-likes-label {
  color: #ff9999;
  font-weight: 600;
  min-width: 40px;
  flex-shrink: 0;
}

.lore-dislikes-label {
  color: #6699cc;
  font-weight: 600;
  min-width: 40px;
  flex-shrink: 0;
}

.lore-likes-value {
  color: var(--lore-text-muted);
}

/* --- CGサムネイル --- */
.lore-cg-thumb {
  position: absolute;
  bottom: 12px;
  right: 12px;
  width: 80px;
  height: 45px;
  border-radius: 6px;
  overflow: hidden;
  border: 2px solid var(--lore-accent-cyan);
  cursor: pointer;
  transition: transform 0.2s;
  background: none;
  padding: 0;
}

.lore-cg-thumb:hover {
  transform: scale(1.1);
}

.lore-cg-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* --- メカパネル（キャラクターカード内展開式） --- */
.lore-character-mech-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding: 8px 16px;
  background: rgba(78,205,196,0.1);
  border: 1px solid var(--lore-accent-cyan);
  border-radius: 6px;
  color: var(--lore-accent-cyan);
  cursor: pointer;
  font-size: 0.85rem;
  transition: all 0.3s;
  width: 100%;
  text-align: left;
}

.lore-character-mech-btn:hover {
  background: rgba(78,205,196,0.2);
}

.lore-character-mech-btn.active {
  background: rgba(78,205,196,0.15);
  border-color: var(--lore-accent-gold);
  color: var(--lore-accent-gold);
}

.lore-character-mech-panel {
  display: flex;
  gap: 16px;
  padding: 16px;
  background: rgba(0,0,0,0.3);
  border-top: 1px solid var(--lore-card-border);
  animation: lore-slideDown 0.3s ease;
}

.lore-mech-panel-img {
  width: 150px;
  height: auto;
  object-fit: contain;
  flex-shrink: 0;
}

.lore-mech-panel-info {
  flex: 1;
}

.lore-mech-panel-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--lore-accent-cyan);
  margin-bottom: 8px;
}

.lore-mech-panel-info p {
  font-size: 0.85rem;
  color: var(--lore-text-muted);
  line-height: 1.5;
}

@keyframes lore-slideDown {
  from { opacity: 0; max-height: 0; }
  to { opacity: 1; max-height: 500px; }
}

/* ============================================================
   6. MECHANIC セクション
   ============================================================ */

/* メカカード: 3列グリッド */
.lore-mech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.lore-mech-card {
  background: var(--lore-card-bg);
  border: 1px solid var(--lore-card-border);
  border-radius: 8px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.lore-mech-card:hover {
  border-color: var(--lore-card-hover-border);
  transform: translateY(-2px);
}

/* メカ画像 */
.lore-mech-img-wrapper {
  width: 100%;
  aspect-ratio: 1 / 1;
  background: var(--lore-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.lore-mech-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* メカ情報テキスト */
.lore-mech-info {
  padding: 20px;
}

/* モデル番号 */
.lore-mech-model {
  font-size: 0.8rem;
  color: var(--lore-accent-cyan);
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}

.lore-mech-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--lore-text);
  margin-bottom: 16px;
}

/* スペック: テーブル風レイアウト */
.lore-mech-specs {
  width: 100%;
  margin-bottom: 16px;
}

.lore-mech-spec-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid rgba(42, 48, 64, 0.5);
  font-size: 0.85rem;
}

.lore-mech-spec-label {
  color: var(--lore-text-muted);
}

.lore-mech-spec-value {
  color: var(--lore-text);
  font-weight: 600;
}

/* メカ説明文 */
.lore-mech-desc {
  font-size: 0.85rem;
  color: var(--lore-text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

/* メカ搭乗者バッジ */
.lore-mech-pilot {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--lore-text);
  background: rgba(42, 48, 64, 0.5);
  border: 1px solid var(--lore-card-border);
  border-radius: 4px;
  padding: 4px 12px;
}

/* --- メカバリアントグリッド（MECHANICセクション用） --- */
.lore-mech-base-group {
  margin-bottom: 32px;
  background: var(--lore-card-bg);
  border: 1px solid var(--lore-card-border);
  border-radius: 12px;
  overflow: hidden;
}

.lore-mech-base-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: rgba(0,0,0,0.2);
  border-bottom: 1px solid var(--lore-card-border);
}

.lore-mech-base-header img {
  width: 80px;
  height: 80px;
  object-fit: contain;
}

.lore-mech-base-header h4 {
  font-size: 1.1rem;
  color: var(--lore-accent-cyan);
  margin: 0;
}

.lore-mech-variants-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 16px;
  padding: 16px;
}

.lore-mech-variant-card {
  text-align: center;
  padding: 12px;
  background: rgba(0,0,0,0.2);
  border-radius: 8px;
  border: 1px solid var(--lore-card-border);
  transition: border-color 0.3s;
  cursor: pointer;
}

.lore-mech-variant-card:hover {
  border-color: var(--lore-accent-cyan);
}

.lore-mech-variant-card img {
  width: 100%;
  max-height: 200px;
  object-fit: contain;
  margin-bottom: 8px;
}

.lore-mech-variant-card span {
  font-size: 0.8rem;
  color: var(--lore-text-muted);
}

/* ============================================================
   7. SYSTEM セクション
   ============================================================ */

/* システムカード: 2x2グリッド */
.lore-system-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.lore-system-card {
  background: var(--lore-card-bg);
  border: 1px solid var(--lore-card-border);
  border-radius: 8px;
  padding: 32px 24px;
  text-align: center;
  transition: all 0.3s ease;
}

.lore-system-card:hover {
  border-color: var(--lore-card-hover-border);
  transform: translateY(-2px);
}

/* 番号: 大きな円形バッジ */
.lore-system-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--lore-accent-cyan);
  color: var(--lore-bg-main);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.lore-system-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--lore-text);
  margin-bottom: 12px;
}

.lore-system-card p {
  font-size: 0.95rem;
  color: var(--lore-text-muted);
  line-height: 1.7;
}

/* ============================================================
   8. フッター
   ============================================================ */
.lore-footer {
  background: var(--lore-footer-bg);
  padding: 60px 20px 40px;
  text-align: center;
  border-top: 1px solid var(--lore-card-border);
}

/* 「ゲームをプレイ」ボタン */
.lore-play-btn {
  display: inline-block;
  padding: 14px 48px;
  background: var(--lore-accent-cyan);
  color: var(--lore-bg-main);
  font-size: 1.1rem;
  font-weight: 700;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  letter-spacing: 0.1em;
  transition: all 0.3s ease;
  text-decoration: none;
  margin-bottom: 24px;
}

.lore-play-btn:hover {
  background: #5ee0d6;
  box-shadow: 0 0 24px rgba(78, 205, 196, 0.3);
  transform: translateY(-2px);
}

/* コピーライト */
.lore-copyright {
  font-size: 0.8rem;
  color: var(--lore-text-muted);
  margin-top: 16px;
}

/* ============================================================
   9. CGライトボックス
   ============================================================ */
.lore-lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lore-lightbox-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(8px);
}

.lore-lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
}

.lore-lightbox-img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 0 60px rgba(78,205,196,0.2);
}

.lore-lightbox-close {
  position: absolute;
  top: -40px;
  right: 0;
  font-size: 2rem;
  color: white;
  background: none;
  border: none;
  cursor: pointer;
  line-height: 1;
}

.lore-lightbox-close:hover {
  color: var(--lore-accent-cyan);
}

.lore-lightbox-caption {
  text-align: center;
  color: var(--lore-text-muted);
  margin-top: 12px;
  font-size: 0.9rem;
}

/* ============================================================
   10. アニメーション・トランジション
   ============================================================ */

/* 汎用フェードインアニメーション */
@keyframes lore-fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.lore-fade-in {
  animation: lore-fadeInUp 0.6s ease forwards;
}

/* ============================================================
   11. レスポンシブ
   ============================================================ */

/* タブレット以下 (max-width: 768px) */
@media (max-width: 768px) {

  /* ナビゲーション */
  .lore-nav {
    padding: 0 20px;
  }

  .lore-nav-links {
    gap: 16px;
  }

  .lore-nav-links a {
    font-size: 0.8rem;
  }

  /* ヒーロー */
  .lore-hero-title {
    font-size: 2.4rem;
    letter-spacing: 0.15em;
  }

  .lore-hero-catchcopy {
    font-size: 1.1rem;
  }

  /* コンテナ */
  .lore-container {
    padding: 0 20px;
  }

  /* セクション */
  .lore-section {
    padding: 60px 0;
  }

  .lore-section-title {
    font-size: 1.6rem;
  }

  /* 勢力カード: 1列 */
  .lore-faction-grid {
    grid-template-columns: 1fr;
  }

  /* タブバー: 横スクロール */
  .lore-tab-bar {
    flex-wrap: nowrap;
    overflow-x: auto;
  }

  /* キャラクターカード: 縦型に */
  .lore-character-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  /* キャラクタービジュアルエリア: パディング縮小 */
  .lore-character-visual {
    padding: 12px;
  }

  /* キャラクター画像: 高さ縮小 */
  .lore-character-img {
    max-height: 300px;
  }

  /* メカパネル: 縦方向に */
  .lore-character-mech-panel {
    flex-direction: column;
  }

  /* メカパネル画像: 幅縮小 */
  .lore-mech-panel-img {
    width: 100px;
  }

  /* メカグリッド: 1列 */
  .lore-mech-grid {
    grid-template-columns: 1fr;
  }

  /* システムグリッド: 1列 */
  .lore-system-grid {
    grid-template-columns: 1fr;
  }
}

/* 中間ブレークポイント (max-width: 1024px) */
@media (max-width: 1024px) and (min-width: 769px) {

  /* ヒーロー */
  .lore-hero-title {
    font-size: 3rem;
  }

  /* 勢力カード: 維持（3列） */

  /* メカグリッド: 2列 */
  .lore-mech-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}