:root {
  --bg: #0b0f17;
  --bg2: #121826;
  --card: #131a29;
  --card-hover: #182234;
  --line: #202a3d;
  --text: #e8edf6;
  --sub: #8b97ac;
  --accent: #f59e0b;
}
* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }
html, body { min-height: 100%; }
body {
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(245, 158, 11, 0.08), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(59, 130, 246, 0.06), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  padding-bottom: calc(2rem + env(safe-area-inset-bottom));
}

/* ヘッダー */
.head { position: sticky; top: 0; z-index: 10; background: rgba(11, 15, 23, 0.82); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.head-inner { max-width: 900px; margin: 0 auto; padding: calc(0.85rem + env(safe-area-inset-top)) 1.2rem 0.85rem; display: flex; align-items: baseline; gap: 0.7rem; }
.brand { font-weight: 800; font-size: 1.15rem; letter-spacing: 0.02em; }
.brand-mark { color: var(--accent); }
.brand-sub { font-size: 0.72rem; color: var(--sub); }

main { max-width: 900px; margin: 0 auto; padding: 0 1.2rem; }

/* ヒーロー */
.hero { padding: 2.4rem 0 1.4rem; }
.hero-title { font-size: clamp(1.7rem, 6vw, 2.5rem); font-weight: 800; line-height: 1.25; letter-spacing: -0.01em; }
.hero-desc { color: var(--sub); font-size: 0.9rem; margin-top: 0.7rem; }

/* アプリグリッド */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr)); gap: 0.85rem; }
.app-card {
  position: relative; display: flex; align-items: center; gap: 0.9rem;
  background: var(--card); border: 1px solid var(--line); border-radius: 16px;
  padding: 1rem 1rem 1rem 1.15rem; text-decoration: none; color: inherit; overflow: hidden;
  transition: transform 0.16s ease, background 0.16s ease, border-color 0.16s ease;
}
.app-card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; background: var(--a, var(--accent)); }
.app-card:active { transform: scale(0.98); }
@media (hover: hover) { .app-card:hover { background: var(--card-hover); border-color: #2c3a54; transform: translateY(-2px); } }
.app-icon { flex: none; width: 52px; height: 52px; border-radius: 13px; display: grid; place-items: center; font-size: 27px; background: color-mix(in srgb, var(--a, var(--accent)) 16%, transparent); }
.app-body { min-width: 0; flex: 1; }
.app-name { font-weight: 700; font-size: 1rem; }
.app-sub { font-family: ui-monospace, monospace; font-size: 0.62rem; letter-spacing: 0.14em; color: var(--a, var(--accent)); text-transform: uppercase; }
.app-desc { font-size: 0.78rem; color: var(--sub); line-height: 1.55; margin-top: 0.35rem; }
.app-tags { display: flex; gap: 0.35rem; margin-top: 0.5rem; flex-wrap: wrap; }
.tag { font-size: 0.62rem; color: var(--sub); border: 1px solid var(--line); border-radius: 99px; padding: 0.12rem 0.55rem; }
.app-open { flex: none; color: var(--sub); font-size: 1.2rem; }
.app-card.soon { opacity: 0.6; pointer-events: none; }
.soon-badge { flex: none; font-size: 0.62rem; color: var(--sub); border: 1px solid var(--line); border-radius: 99px; padding: 0.15rem 0.6rem; }

/* 裏方システム */
.systems { margin-top: 2.4rem; }
.sec-title { font-size: 0.82rem; color: var(--sub); font-weight: 700; margin-bottom: 0.8rem; letter-spacing: 0.04em; }
.sec-title span { font-weight: 400; font-size: 0.72rem; }
.sys-list { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.sys-row { background: var(--bg2); padding: 0.75rem 1rem; display: flex; align-items: baseline; gap: 0.7rem; }
.sys-name { font-size: 0.86rem; font-weight: 600; flex: none; }
.sys-desc { font-size: 0.74rem; color: var(--sub); min-width: 0; }
.sys-dot { flex: none; width: 6px; height: 6px; border-radius: 50%; background: #22c55e; align-self: center; box-shadow: 0 0 6px #22c55e88; }

/* フッター */
.foot { margin-top: 2.4rem; text-align: center; color: var(--sub); font-size: 0.78rem; line-height: 1.9; }
.foot-dim { color: #5b6b84; font-size: 0.72rem; }
.foot code { font-family: ui-monospace, monospace; background: var(--bg2); border: 1px solid var(--line); border-radius: 5px; padding: 0.1rem 0.4rem; color: var(--text); }