:root{--bg:#0f1220;--card:#1a1f36;--accent:#5b8cff;--accent2:#22c55e;--txt:#e9ecf5;--muted:#9aa3bf;--line:#2a3152}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--txt)}
.wrap{max-width:560px;margin:0 auto;padding:28px 20px}
h1{font-size:1.5rem;margin:.2em 0 1em}h2{font-size:1.05rem;margin:1.4em 0 .6em;color:var(--muted);font-weight:600}
.muted{color:var(--muted)}.small{font-size:.85rem}.err{color:#f87171}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px}
.current .lbl{display:block;font-size:.8rem;color:var(--muted);margin-bottom:6px}
.row{display:flex;align-items:center;justify-content:space-between;gap:14px;margin:10px 0}
.row .lbl{color:var(--muted);font-size:.92rem}
.seg{display:inline-flex;background:var(--card);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.seg-btn{appearance:none;border:0;background:transparent;color:var(--txt);padding:9px 16px;cursor:pointer;font-size:.92rem;transition:.15s}
.seg-btn.active{background:var(--accent);color:#fff;font-weight:600}
.seg-btn.toggle.active{background:var(--accent2)}
.cta{width:100%;margin-top:18px;padding:14px;border:0;border-radius:12px;background:var(--accent);color:#fff;font-size:1.05rem;font-weight:700;cursor:pointer}
.cta:disabled{opacity:.45;cursor:not-allowed}
.cta:not(:disabled):hover{filter:brightness(1.08)}