:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel2: #1f242e;
  --text: #e6e8ee;
  --muted: #9aa3b2;
  --accent: #7c5cff;
  --accent2: #5b8cff;
  --ok: #2ecc71;
  --err: #ff5c6c;
  --border: #2a2f3a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a { color: var(--accent2); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: .8rem 1.2rem; background: var(--panel); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 800; font-size: 1.3rem; color: var(--text); }
.nav { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.nav a.active { color: var(--accent); font-weight: 600; }
.nav .who { color: var(--muted); font-size: .9rem; }
.inline { display: inline; margin: 0; }

.container { max-width: 900px; margin: 0 auto; padding: 1.5rem 1.2rem 4rem; }

.hero { text-align: center; padding: 3rem 0 2rem; }
.hero h1 { font-size: 2.4rem; margin: 0 0 .5rem; }
.lead { color: var(--muted); font-size: 1.1rem; }
.cta { margin-top: 1.5rem; display: flex; gap: .8rem; justify-content: center; flex-wrap: wrap; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin: 2rem 0; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 1.2rem; }
.card h3 { margin: 0 0 .4rem; }
.platforms { text-align: center; margin-top: 2rem; color: var(--muted); }

.btn {
  display: inline-block; padding: .6rem 1.1rem; border-radius: 10px;
  background: var(--panel2); color: var(--text); border: 1px solid var(--border);
  cursor: pointer; font-size: 1rem; font-weight: 600;
}
.btn:hover { border-color: var(--accent); text-decoration: none; }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent2)); border: none; color: #fff; }
.btn.small { padding: .35rem .7rem; font-size: .85rem; }
.btn.link, .link { background: none; border: none; color: var(--accent2); cursor: pointer; font-size: .95rem; padding: 0; }
.link.danger { color: var(--err); }

.form { display: flex; flex-direction: column; gap: 1rem; max-width: 520px; margin-top: 1rem; }
.form label { display: flex; flex-direction: column; gap: .35rem; font-weight: 600; }
.form .check { flex-direction: row; align-items: center; gap: .5rem; font-weight: 400; }
input, select, textarea {
  background: var(--panel2); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: .6rem .7rem; font-size: 1rem; font-family: inherit;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }
textarea { resize: vertical; }

.narrow { max-width: 420px; margin: 2rem auto; }

.alert { padding: .8rem 1rem; border-radius: 10px; margin-bottom: 1rem; }
.alert.ok { background: rgba(46,204,113,.12); border: 1px solid var(--ok); color: var(--ok); }
.alert.err { background: rgba(255,92,108,.12); border: 1px solid var(--err); color: var(--err); }

.result { margin-top: 2rem; border-top: 1px solid var(--border); padding-top: 1.2rem; }
.box {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  padding: 1rem; white-space: pre-wrap; word-break: break-word; font-family: inherit;
}

.recorder { display: flex; align-items: center; gap: .8rem; }
#rec-toggle.recording { background: var(--err); border: none; color: #fff; }

.table { width: 100%; border-collapse: collapse; margin: 1rem 0; }
.table th, .table td { text-align: left; padding: .55rem .6rem; border-bottom: 1px solid var(--border); }
.table th { color: var(--muted); font-weight: 600; }
.badge { font-size: .75rem; padding: .1rem .5rem; border-radius: 999px; background: var(--panel2); }
.badge.on { color: var(--ok); } .badge.off { color: var(--err); }

.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1rem; margin-top: 1rem; }

.muted { color: var(--muted); }
.small { font-size: .85rem; }
code { background: var(--panel2); padding: .1rem .35rem; border-radius: 5px; }

.footer {
  display: flex; justify-content: space-between; padding: 1rem 1.2rem;
  border-top: 1px solid var(--border); color: var(--muted); font-size: .85rem;
}