@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg-color: #070a13;
  --bg-gradient: radial-gradient(circle at 50% 0%, #0f162a 0%, #070a13 100%);
  --panel-bg: rgba(15, 22, 38, 0.6);
  --panel-border: rgba(255, 255, 255, 0.06);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #475569;
  
  --primary-accent: #3b82f6;
  
  --font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  background-color: var(--bg-color);
  background-image: var(--bg-gradient);
  color: var(--text-primary);
  font-family: var(--font-family);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  padding-bottom: 80px;
}

/* ヘッダー */
header {
  max-width: 2400px; /* 4Kモニター向けに最大幅を2400pxに拡張 */
  margin: 0 auto;
  padding: 60px 40px 40px;
  text-align: center;
}

.portal-logo {
  font-size: clamp(1.75rem, 4vw + 1rem, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #ffffff 0%, #94a3b8 50%, #3b82f6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.portal-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

/* メインコンテナ */
.main-container {
  max-width: 2400px; /* 4Kモニター向けに最大幅を2400pxに拡張 */
  margin: 0 auto;
  padding: 0 60px;
  transition: var(--transition-smooth);
}

@media (max-width: 768px) {
  .main-container {
    padding: 0 20px;
  }
}

/* ポータルグリッド */
.portal-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 40px;
}

@media (min-width: 768px) {
  .portal-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
}

@media (min-width: 1024px) {
  .portal-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1440px) {
  .portal-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

@media (min-width: 1920px) {
  .portal-grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

/* ポータルカード */
.portal-card {
  text-decoration: none;
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  border-radius: 20px;
  overflow: hidden;
  background: var(--panel-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--panel-border);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
  transition: var(--transition-smooth);
  
  /* カードごとに個別のカラーを上書きできるように変数化 */
  --card-accent-h: 215;
  --card-accent-color: hsl(var(--card-accent-h), 90%, 60%);
  --card-accent-glow: hsla(var(--card-accent-h), 90%, 60%, 0.25);
}

.portal-card:hover {
  transform: translateY(-8px);
  border-color: var(--card-accent-color);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.6), 0 0 20px var(--card-accent-glow);
}

/* 画像ラッパー */
.card-image-wrapper {
  width: 100%;
  aspect-ratio: 1;
  position: relative;
  overflow: hidden;
  background: #03050a;
}

.card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.portal-card:hover .card-image {
  transform: scale(1.06);
}

/* カード上のオーバーレイタグ */
.card-tag {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 8px;
  background: rgba(7, 10, 19, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  backdrop-filter: blur(8px);
  transition: var(--transition-smooth);
}

.portal-card:hover .card-tag {
  border-color: var(--card-accent-color);
  color: var(--card-accent-color);
  box-shadow: 0 0 8px var(--card-accent-glow);
}

/* カードテキスト情報 */
.card-info {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.card-series {
  font-size: clamp(0.75rem, 1vw + 0.3rem, 0.9rem);
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.85;
}

.card-title {
  font-size: clamp(0.95rem, 1.5vw + 0.5rem, 1.2rem);
  font-weight: 700;
  line-height: 1.4;
  height: 2.8em;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: var(--transition-smooth);
}

.portal-card:hover .card-title {
  color: var(--card-accent-color);
}

.card-specs {
  font-size: clamp(0.75rem, 1vw + 0.3rem, 0.9rem);
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 12px;
  margin-top: auto;
}

.card-manufacturer {
  font-weight: 500;
  color: inherit;
}

.card-scale {
  color: inherit;
  opacity: 0.8;
}

/* フッター */
footer {
  text-align: center;
  margin-top: 100px;
  color: var(--text-muted);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

/* 年齢制限モーダルオーバーレイ */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(3, 5, 10, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay:not(.hidden) {
  opacity: 1;
  pointer-events: auto;
}

.modal-overlay.hidden {
  display: none !important;
}

/* 年齢制限コンテンツ */
.age-gate-content {
  position: relative; /* 閉じるボタンの絶対配置のため */
  max-width: 480px;
  width: 90%;
  padding: 40px;
  text-align: center;
  border-color: rgba(239, 68, 68, 0.3) !important; /* 赤い警告ボーダー */
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5), 0 0 25px rgba(239, 68, 68, 0.15) !important;
  --accent-color: #ef4444;
}

.age-gate-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.8rem;
  cursor: pointer;
  transition: var(--transition-smooth);
  line-height: 1;
}

.age-gate-close:hover {
  color: #ef4444;
}

.age-gate-content h2 {
  font-size: 1.8rem;
  font-weight: 800;
  color: #ef4444;
  margin-bottom: 20px;
  letter-spacing: 0.05em;
  text-shadow: 0 0 10px rgba(239, 68, 68, 0.3);
}

.age-gate-icon {
  font-size: 3rem;
  font-weight: 800;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 4px solid #ef4444;
  color: #ef4444;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0 auto 24px;
  box-shadow: 0 0 15px rgba(239, 68, 68, 0.2);
}

.age-gate-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 32px;
}

.age-gate-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.age-btn {
  font-family: var(--font-family);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 12px 28px;
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.age-yes {
  background: #ef4444;
  border: 1px solid #ef4444;
  color: white;
  box-shadow: 0 0 15px rgba(239, 68, 68, 0.3);
}

.age-yes:hover {
  background: #dc2626;
  border-color: #dc2626;
  box-shadow: 0 0 25px rgba(239, 68, 68, 0.5);
  transform: translateY(-2px);
}

.age-no {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
}

.age-no:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
  transform: translateY(-2px);
}

/* ポータルでのNSFWカード用追加スタイル */
.portal-card.nsfw-gated {
  border-color: rgba(239, 68, 68, 0.1);
}
.portal-card.nsfw-gated:hover {
  border-color: #ef4444;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.6), 0 0 20px rgba(239, 68, 68, 0.25);
  --card-accent-color: #ef4444;
}