@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&display=swap');

:root {
  --dark:#0d0d1a; --card:rgba(255,255,255,.05); --card-border:rgba(255,255,255,.1);
  --accent:#e94560; --accent2:#f5a623; --text:#f0f0f0; --text-muted:#888;
  --radius:12px; --shadow:0 8px 32px rgba(0,0,0,.4);
}
*{box-sizing:border-box;margin:0;padding:0;}
body{font-family:'Noto Sans JP',system-ui,sans-serif;background:var(--dark);color:var(--text);min-height:100vh;line-height:1.7;}
body::before{content:'';position:fixed;inset:0;background:radial-gradient(ellipse at 15% 40%,rgba(233,69,96,.07) 0%,transparent 55%),radial-gradient(ellipse at 85% 10%,rgba(245,166,35,.05) 0%,transparent 55%);pointer-events:none;z-index:0;}

.site-header{position:sticky;top:0;z-index:100;background:rgba(13,13,26,.9);backdrop-filter:blur(16px);border-bottom:1px solid rgba(233,69,96,.25);padding:0 24px;height:60px;display:flex;align-items:center;justify-content:space-between;}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;font-size:18px;font-weight:700;}
.logo-cat{font-size:24px;animation:blink 4s ease-in-out infinite;}
@keyframes blink{0%,90%,100%{transform:scaleY(1);}95%{transform:scaleY(.1);}}
.logo-text{background:linear-gradient(135deg,#fff,var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}
.logo-badge{font-size:11px;background:rgba(233,69,96,.2);border:1px solid rgba(233,69,96,.4);color:var(--accent);padding:2px 8px;border-radius:20px;font-weight:600;}
.header-nav{display:flex;align-items:center;gap:20px;}
.header-nav a{color:var(--text-muted);text-decoration:none;font-size:14px;transition:color .2s;}
.header-nav a:hover{color:var(--text);}
.container{max-width:1000px;margin:0 auto;padding:32px 20px;position:relative;z-index:1;}

/* ヒーロー */
.hero{text-align:center;padding:80px 20px 60px;position:relative;z-index:1;}
.hero-badge{display:inline-block;background:rgba(233,69,96,.15);border:1px solid rgba(233,69,96,.3);color:var(--accent);font-size:13px;font-weight:600;padding:4px 14px;border-radius:20px;margin-bottom:20px;}
.hero h1{font-size:clamp(40px,8vw,72px);font-weight:900;background:linear-gradient(135deg,#fff 30%,var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:16px;letter-spacing:-1px;}
.hero p{color:var(--text-muted);font-size:18px;max-width:560px;margin:0 auto 32px;}
.hero-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:28px;}
.hero-meta{display:flex;gap:20px;justify-content:center;flex-wrap:wrap;font-size:13px;color:var(--text-muted);}
.hero-meta span{display:flex;align-items:center;gap:5px;}

/* ボタン */
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border:none;border-radius:8px;font-family:inherit;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s;text-decoration:none;}
.btn-lg{padding:14px 28px;font-size:16px;border-radius:10px;}
.btn-primary{background:linear-gradient(135deg,var(--accent),#c0392b);color:#fff;box-shadow:0 4px 14px rgba(233,69,96,.35);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(233,69,96,.5);}
.btn-secondary{background:rgba(255,255,255,.08);color:var(--text);border:1px solid rgba(255,255,255,.15);}
.btn-secondary:hover{background:rgba(255,255,255,.14);}
.btn-danger{background:rgba(233,69,96,.15);color:var(--accent);border:1px solid rgba(233,69,96,.3);}
.btn-danger:hover{background:rgba(233,69,96,.25);}

/* セクション */
.section-title{font-size:28px;font-weight:700;text-align:center;margin-bottom:36px;background:linear-gradient(135deg,#fff,var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}

/* 機能グリッド */
.features{padding:60px 0;background:rgba(0,0,0,.2);}
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;}
.feature-card{background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);padding:24px;transition:transform .2s,border-color .2s;}
.feature-card:hover{transform:translateY(-3px);border-color:rgba(233,69,96,.3);}
.feature-icon{font-size:36px;margin-bottom:14px;}
.feature-card h3{font-size:16px;font-weight:700;margin-bottom:8px;}
.feature-card p{font-size:14px;color:var(--text-muted);line-height:1.7;}

/* ダウンロード */
.download-section{padding:60px 0;}
.version-info{text-align:center;color:var(--text-muted);font-size:14px;margin-bottom:24px;}
.download-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;}
.download-card{background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);padding:20px 24px;display:flex;align-items:center;gap:16px;text-decoration:none;color:inherit;transition:all .2s;}
.download-card:hover{border-color:rgba(233,69,96,.4);transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.3);}
.dl-icon{font-size:36px;flex-shrink:0;}
.dl-info{flex:1;}
.dl-os{font-size:12px;color:var(--text-muted);font-weight:600;text-transform:uppercase;letter-spacing:1px;}
.dl-name{font-size:15px;font-weight:700;margin:2px 0;}
.dl-meta{font-size:12px;color:var(--text-muted);}
.dl-btn{font-size:13px;font-weight:600;color:var(--accent);white-space:nowrap;}

/* ISO */
.iso-section{padding:60px 0;background:rgba(0,0,0,.15);}
.iso-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px;}
.iso-card{background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);padding:20px 16px;text-align:center;text-decoration:none;color:inherit;transition:all .2s;display:block;}
.iso-card:hover{border-color:rgba(233,69,96,.4);transform:translateY(-2px);}
.iso-icon{font-size:36px;margin-bottom:10px;}
.iso-name{font-size:13px;font-weight:700;margin-bottom:4px;}
.iso-ver{font-size:11px;color:var(--text-muted);}
.iso-size{font-size:11px;color:var(--text-muted);margin-top:4px;}

.iso-list{display:flex;flex-direction:column;gap:10px;}
.iso-row{background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);padding:16px 20px;display:flex;align-items:center;gap:16px;}
.iso-row-icon{font-size:28px;flex-shrink:0;}
.iso-row-info{flex:1;}
.iso-row-name{font-size:15px;font-weight:700;}
.iso-row-meta{font-size:12px;color:var(--text-muted);margin-top:3px;}

.tag{display:inline-block;padding:5px 14px;border-radius:20px;font-size:12px;font-weight:600;cursor:pointer;text-decoration:none;transition:all .2s;border:1px solid transparent;}
.tag-other{background:rgba(255,255,255,.06);color:var(--text-muted);border-color:rgba(255,255,255,.12);}
.tag-active{background:rgba(233,69,96,.15);color:var(--accent);border-color:rgba(233,69,96,.3);}
.tag-filter{display:flex;gap:8px;flex-wrap:wrap;}

/* 更新履歴 */
.changelog-item{background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);padding:24px;margin-bottom:16px;}
.changelog-header{display:flex;align-items:center;gap:12px;margin-bottom:8px;}
.version-badge{font-size:12px;font-weight:700;background:linear-gradient(135deg,var(--accent),#c0392b);color:#fff;padding:3px 10px;border-radius:6px;}
.changelog-body{font-size:14px;color:var(--text-muted);line-height:1.8;white-space:pre-wrap;}

/* フォーム */
.form-group{margin-bottom:14px;}
.form-group label{display:block;font-size:12px;font-weight:600;color:var(--text-muted);margin-bottom:5px;}
.form-group input,.form-group textarea,.form-group select{width:100%;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:8px;color:var(--text);font-family:inherit;font-size:14px;padding:10px 12px;outline:none;transition:border-color .2s;}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{border-color:rgba(233,69,96,.5);}
.form-group select option{background:#1a1a2e;}
.form-group textarea{min-height:80px;resize:vertical;}

.alert{padding:12px 16px;border-radius:10px;margin-bottom:16px;font-size:14px;}
.alert-success{background:rgba(46,204,113,.12);border:1px solid rgba(46,204,113,.3);color:#7deba5;}
.alert-error{background:rgba(233,69,96,.15);border:1px solid rgba(233,69,96,.3);color:#ff8a9a;}

.site-footer{border-top:1px solid var(--card-border);padding:24px;text-align:center;color:var(--text-muted);font-size:13px;margin-top:60px;position:relative;z-index:1;}
.site-footer a{color:var(--accent);text-decoration:none;}

::-webkit-scrollbar{width:6px;}
::-webkit-scrollbar-track{background:var(--dark);}
::-webkit-scrollbar-thumb{background:rgba(233,69,96,.4);border-radius:3px;}

@media(max-width:600px){
  .site-header{padding:0 14px;}
  .header-nav{gap:12px;}
  .hero{padding:50px 16px 40px;}
  .container{padding:20px 14px;}
  .download-card{flex-direction:column;text-align:center;}
}