:root{
  --bg:#111314; --fg:#e8e9ee; --muted:#a7a9b5;
  --card:#16181a; --border:#27292f; --accent:#2a2d35;
}
:root[data-theme=light]{
  --bg:#fafafa; --fg:#222; --muted:#555;
  --card:#ffffff; --border:#e5e7eb; --accent:#eef2f7;
}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,sans-serif;background:var(--bg);color:var(--fg)}
.app-header{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:16px;border-bottom:1px solid var(--border);background:linear-gradient(180deg,rgba(0,0,0,.06),transparent)}
.brand h1{margin:0;font-size:28px}
.pro-badge{font-size:12px;background:var(--accent);border:1px solid var(--border);border-radius:8px;padding:2px 6px;margin-left:6px}
.subtitle{margin:6px 0 0;color:var(--muted)}
.header-actions{display:flex;gap:8px;align-items:center}
select,button,input[type=time],input[type=number],input[type=text]{background:var(--accent);color:var(--fg);border:1px solid var(--border);border-radius:10px;padding:8px 10px}
button{cursor:pointer;font-weight:600}
main{max-width:1000px;margin:0 auto;padding:16px;display:grid;grid-template-columns:1fr;gap:16px}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:16px;box-shadow:0 4px 18px rgba(0,0,0,.12)}
h2{margin:0 0 12px 0}
.controls{display:flex;flex-wrap:wrap;gap:10px;margin:12px 0}
.sound{display:flex;align-items:center;gap:6px}
.breath{width:140px;height:140px;margin:12px auto;border-radius:50%;border:3px solid var(--border);animation:breath 6s ease-in-out infinite}
@keyframes breath{0%{transform:scale(0.85)}50%{transform:scale(1.1)}100%{transform:scale(0.85)}}
.step{text-align:center;font-size:18px;margin:6px 0 0;color:var(--muted)}
.hint{color:var(--muted)}
.program{padding-left:20px;margin:0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;margin-bottom:12px}
footer{padding:16px;text-align:center;color:var(--muted)}
.linklike{background:transparent;border:0;color:var(--fg);text-decoration:underline;padding:0}
dialog{border:1px solid var(--border);border-radius:12px;background:var(--card);color:var(--fg);padding:0}
dialog .settings{padding:16px}
dialog menu{display:flex;justify-content:flex-end;gap:8px;margin:12px 0 0}
canvas#chart{display:block;width:100%;max-width:100%;height:auto;border:1px dashed var(--border);border-radius:10px;margin-top:12px;background:linear-gradient(180deg,transparent,rgba(0,0,0,.03))}