/* ============================================
   SC Gunpack!! - フラットデザイン スタイルシート
   ============================================ */

/* --- カスタムプロパティ（デザイントークン） --- */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #16161f;
  --bg-card-hover: #1c1c28;
  --surface: #1e1e2a;
  --border: #2a2a3a;
  --border-hover: #3a3a4f;
  --text-primary: #eaeaf0;
  --text-secondary: #8888a0;
  --text-muted: #55556a;
  --accent: #f59e0b;
  --accent-hover: #fbbf24;
  --accent-glow: rgba(245, 158, 11, 0.25);
  --accent-subtle: rgba(245, 158, 11, 0.08);
  --cyan: #06b6d4;
  --cyan-glow: rgba(6, 182, 212, 0.2);
  --green: #10b981;
  --red: #ef4444;
  --purple: #8b5cf6;
  --font-main: 'Outfit', 'Noto Sans JP', sans-serif;
  --font-jp: 'Noto Sans JP', sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- リセット＆ベース --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* --- ナビゲーション --- */
.navbar {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.navbar.scrolled { background: rgba(10, 10, 15, 0.95); }
.nav-container {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; height: 72px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.3rem; }
.logo-icon { font-size: 1.5rem; }
.logo-text { background: linear-gradient(135deg, var(--accent), var(--accent-hover)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; letter-spacing: 1px; }
.nav-links { display: flex; gap: 8px; }
.nav-link {
  padding: 8px 16px; border-radius: var(--radius-sm); color: var(--text-secondary);
  font-size: 0.9rem; font-weight: 500; transition: var(--transition); position: relative;
}
.nav-link:hover, .nav-link.active { color: var(--text-primary); background: var(--accent-subtle); }
.nav-link.active { color: var(--accent); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; padding: 4px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text-secondary); border-radius: 2px; transition: var(--transition); }

/* --- ヒーローセクション --- */
.hero {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  padding: 120px 24px 80px; position: relative; overflow: hidden;
}
.hero-bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(42, 42, 58, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 42, 58, 0.15) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, black 20%, transparent 70%);
}
.hero-particles { position: absolute; inset: 0; pointer-events: none; }
.hero-content { max-width: 640px; text-align: center; position: relative; z-index: 2; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px; border-radius: 999px; font-size: 0.8rem; font-weight: 500;
  background: var(--accent-subtle); color: var(--accent); border: 1px solid rgba(245, 158, 11, 0.15);
  margin-bottom: 28px;
}
.badge-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); animation: pulse-dot 2s infinite; }
@keyframes pulse-dot { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
.hero-title { font-size: clamp(3.5rem, 8vw, 6rem); font-weight: 900; line-height: 1.05; margin-bottom: 20px; letter-spacing: -2px; }
.title-line { display: block; }
.title-line.accent { color: var(--accent); }
.title-exclaim { color: var(--cyan); }
.hero-subtitle { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 36px; line-height: 1.8; font-family: var(--font-jp); }
.hero-actions { display: flex; gap: 14px; justify-content: center; margin-bottom: 56px; flex-wrap: wrap; }

/* --- ボタン --- */
.btn {
  display: inline-flex; align-items: center; gap: 10px; padding: 14px 28px;
  border-radius: var(--radius-sm); font-weight: 600; font-size: 0.95rem;
  transition: var(--transition); cursor: pointer; border: none; font-family: var(--font-main);
}
.btn-primary {
  background: var(--accent); color: #000;
  box-shadow: 0 0 0 0 var(--accent-glow);
}
.btn-primary:hover { background: var(--accent-hover); box-shadow: 0 0 24px 4px var(--accent-glow); transform: translateY(-2px); }
.btn-secondary {
  background: var(--surface); color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--border-hover); background: var(--bg-card-hover); transform: translateY(-2px); }
.btn-download {
  background: var(--accent); color: #000; padding: 16px 32px; font-size: 1rem;
}
.btn-download:hover { background: var(--accent-hover); box-shadow: 0 0 32px 8px var(--accent-glow); transform: translateY(-2px); }
.btn-outline {
  background: transparent; color: var(--text-primary); border: 1px solid var(--border);
  padding: 16px 32px; font-size: 1rem; border-radius: var(--radius-sm); font-weight: 600;
  font-family: var(--font-main); cursor: pointer; transition: var(--transition);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

/* --- 統計 --- */
.hero-stats { display: flex; align-items: center; justify-content: center; gap: 32px; flex-wrap: wrap; }
.stat-item { text-align: center; }
.stat-number { font-size: 2rem; font-weight: 800; color: var(--text-primary); }
.stat-plus { font-size: 1.5rem; font-weight: 700; color: var(--accent); }
.stat-label { display: block; font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; font-family: var(--font-jp); }
.stat-divider { width: 1px; height: 40px; background: var(--border); }

/* --- ヒーロービジュアル --- */
.hero-visual { display: none; }

/* --- セクション共通 --- */
.section-header { text-align: center; margin-bottom: 56px; }
.section-tag {
  display: inline-block; font-size: 0.75rem; font-weight: 700; letter-spacing: 3px;
  color: var(--accent); margin-bottom: 12px; text-transform: uppercase;
}
.section-title { font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 800; letter-spacing: -1px; margin-bottom: 16px; }
.section-title.left-align { text-align: left; }
.section-desc { color: var(--text-secondary); font-size: 1rem; max-width: 560px; margin: 0 auto; font-family: var(--font-jp); }

/* --- 特徴セクション --- */
.features { padding: 100px 0; background: var(--bg-secondary); }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 20px; }
.feature-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 32px; transition: var(--transition); position: relative; overflow: hidden;
}
.feature-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0; transition: var(--transition);
}
.feature-card:hover { border-color: var(--border-hover); background: var(--bg-card-hover); transform: translateY(-4px); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 56px; height: 56px; border-radius: var(--radius-md);
  background: var(--accent-subtle); color: var(--accent);
  display: flex; align-items: center; justify-content: center; margin-bottom: 20px;
}
.feature-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; }
.feature-desc { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; font-family: var(--font-jp); }

/* --- 武器セクション --- */
.weapons { padding: 100px 0; }
.weapon-categories { display: flex; gap: 8px; justify-content: center; margin-bottom: 40px; flex-wrap: wrap; }
.category-btn {
  padding: 8px 20px; border-radius: 999px; border: 1px solid var(--border);
  background: transparent; color: var(--text-secondary); font-size: 0.85rem;
  font-weight: 500; cursor: pointer; transition: var(--transition); font-family: var(--font-main);
}
.category-btn:hover { border-color: var(--border-hover); color: var(--text-primary); }
.category-btn.active { background: var(--accent); color: #000; border-color: var(--accent); font-weight: 600; }
.weapons-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.weapon-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 24px; transition: var(--transition); cursor: default;
}
.weapon-card:hover { border-color: var(--border-hover); transform: translateY(-3px); }
.weapon-card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.weapon-card-icon { font-size: 2rem; }
.weapon-card-category {
  font-size: 0.7rem; font-weight: 600; letter-spacing: 1px; text-transform: uppercase;
  padding: 3px 10px; border-radius: 999px; background: var(--accent-subtle); color: var(--accent);
}
.weapon-card-name { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.weapon-card-desc { font-size: 0.82rem; color: var(--text-muted); margin-bottom: 16px; font-family: var(--font-jp); }
.weapon-card-stats { display: flex; gap: 16px; }
.weapon-stat { display: flex; flex-direction: column; gap: 2px; }
.weapon-stat-label { font-size: 0.65rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.weapon-stat-value { font-size: 0.85rem; font-weight: 600; color: var(--text-primary); }

/* --- コミュニティセクション --- */
.community { padding: 100px 0; background: var(--bg-secondary); }
.community-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.community-desc { color: var(--text-secondary); margin: 20px 0 32px; line-height: 1.8; font-family: var(--font-jp); }
.community-links { display: flex; gap: 14px; flex-wrap: wrap; }
.community-btn {
  display: inline-flex; align-items: center; gap: 10px; padding: 12px 24px;
  border-radius: var(--radius-sm); font-weight: 600; font-size: 0.9rem; transition: var(--transition);
}
.community-btn.discord { background: #5865F2; color: #fff; }
.community-btn.discord:hover { background: #4752c4; transform: translateY(-2px); }
.community-btn.twitter { background: var(--surface); color: var(--text-primary); border: 1px solid var(--border); }
.community-btn.twitter:hover { border-color: var(--border-hover); transform: translateY(-2px); }

/* --- Discordプレビュー --- */
.discord-preview {
  background: #1e1f22; border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border); box-shadow: var(--shadow);
}
.discord-header {
  display: flex; align-items: center; gap: 8px; padding: 14px 20px;
  background: #2b2d31; border-bottom: 1px solid rgba(255,255,255,0.05);
}
.discord-dot { width: 12px; height: 12px; border-radius: 50%; }
.discord-dot.red { background: #ed4245; }
.discord-dot.yellow { background: #fee75c; }
.discord-dot.green { background: #57f287; }
.discord-title { margin-left: 12px; font-size: 0.9rem; font-weight: 600; color: #fff; }
.discord-messages { padding: 16px 20px; display: flex; flex-direction: column; gap: 16px; }
.discord-msg { display: flex; gap: 12px; }
.discord-avatar {
  width: 36px; height: 36px; min-width: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 0.85rem;
}
.discord-msg-content { flex: 1; }
.discord-username { font-weight: 600; font-size: 0.85rem; color: #fff; margin-right: 8px; }
.discord-time { font-size: 0.7rem; color: #72767d; }
.discord-msg-content p { font-size: 0.85rem; color: #dcddde; margin-top: 3px; font-family: var(--font-jp); }

/* --- ダウンロードセクション --- */
.download { padding: 100px 0; }
.download-card {
  position: relative; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-xl); padding: 64px 40px; text-align: center; overflow: hidden;
}
.download-glow {
  position: absolute; top: -100px; left: 50%; transform: translateX(-50%);
  width: 400px; height: 400px; border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}
.download-content { position: relative; z-index: 2; }
.download-title { font-size: clamp(1.8rem, 4vw, 2.5rem); font-weight: 800; margin-bottom: 16px; }
.download-desc { color: var(--text-secondary); margin-bottom: 28px; font-family: var(--font-jp); line-height: 1.8; }
.download-version { display: inline-flex; align-items: center; gap: 12px; margin-bottom: 32px; }
.version-tag { font-size: 0.75rem; color: var(--text-muted); font-weight: 500; text-transform: uppercase; letter-spacing: 1px; }
.version-number { font-size: 1.1rem; font-weight: 700; color: var(--accent); }
.download-buttons { display: flex; gap: 14px; justify-content: center; margin-bottom: 32px; flex-wrap: wrap; }
.download-info { display: flex; gap: 28px; justify-content: center; flex-wrap: wrap; }
.info-item { display: flex; align-items: center; gap: 8px; color: var(--text-muted); font-size: 0.85rem; }

/* --- フッター --- */
.footer { padding: 60px 0 32px; border-top: 1px solid var(--border); background: var(--bg-secondary); }
.footer-top { display: grid; grid-template-columns: 1.5fr 2fr; gap: 60px; margin-bottom: 48px; }
.footer-tagline { color: var(--text-muted); font-size: 0.9rem; margin-top: 12px; font-family: var(--font-jp); }
.footer-links-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.footer-col h4 { font-size: 0.85rem; font-weight: 600; margin-bottom: 16px; color: var(--text-primary); }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: var(--text-muted); font-size: 0.85rem; transition: var(--transition); }
.footer-col ul li a:hover { color: var(--accent); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 24px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.footer-bottom p { color: var(--text-muted); font-size: 0.8rem; }
.footer-note { font-family: var(--font-jp); }

/* --- アニメーション --- */
@keyframes fade-up { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
.animate-on-scroll { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.animate-on-scroll.visible { opacity: 1; transform: translateY(0); }

/* --- レスポンシブ --- */
@media (max-width: 900px) {
  .community-layout { grid-template-columns: 1fr; gap: 40px; }
  .section-title.left-align { text-align: center; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-links-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .nav-links { display: none; position: absolute; top: 72px; left: 0; width: 100%; background: rgba(10,10,15,0.98); flex-direction: column; padding: 16px 24px; border-bottom: 1px solid var(--border); }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .hero { padding: 100px 20px 60px; }
  .hero-title { font-size: clamp(2.8rem, 10vw, 4rem); }
  .hero-stats { gap: 20px; }
  .stat-divider { display: none; }
  .features-grid { grid-template-columns: 1fr; }
  .weapons-grid { grid-template-columns: 1fr 1fr; }
  .footer-links-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
  .weapons-grid { grid-template-columns: 1fr; }
  .download-card { padding: 40px 20px; }
  .footer-links-grid { grid-template-columns: 1fr; }
}