:root {
  --bg:#f4f5f7;
  --card:#fff;
  --text:#202226;
  --muted:#6d7278;
  --border:#d8dce2;
  --accent:#2f5ea8;
  --accent-hover:#244b87;
  --danger:#b42318;
  --soft:#eef3f9;
}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.55}
.app-shell{width:min(900px,calc(100% - 28px));margin:32px auto}
.screen{display:none}
.screen.active{display:block}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:28px}
h1,h2{margin-top:0;line-height:1.25}
.lead,.muted{color:var(--muted)}
label{display:block;font-weight:600;margin-bottom:18px}
input[type=text],input[type=number],textarea{width:100%;margin-top:8px;padding:12px 13px;border:1px solid var(--border);border-radius:10px;font:inherit;background:#fff;color:var(--text)}
textarea{resize:vertical;min-height:110px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
button{min-height:44px;padding:11px 18px;border:0;border-radius:10px;font:inherit;font-weight:700;cursor:pointer}
button.primary{background:var(--accent);color:#fff}
button.primary:hover{background:var(--accent-hover)}
button:disabled{opacity:.55;cursor:not-allowed}
.task-header{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:18px}
.timer{font-size:1.65rem;font-weight:800;font-variant-numeric:tabular-nums;min-width:92px;text-align:center;padding:8px 12px;border-radius:10px;background:var(--soft)}
.prompt{padding:14px 16px;border-left:4px solid var(--accent);background:var(--soft);margin:20px 0}
.error{color:var(--danger);min-height:1.4em}
.idea-list{display:grid;gap:8px;margin-top:16px}
.idea-item{padding:10px 12px;border:1px solid var(--border);border-radius:10px;background:#fafbfc}
.progress{color:var(--muted);margin-bottom:8px}
.dilemma-text{font-size:1.05rem}
fieldset{border:1px solid var(--border);border-radius:10px;padding:14px 16px;margin:0 0 22px}
legend{font-weight:700;padding:0 6px}
.radio-row{display:flex;align-items:center;gap:9px;margin:10px 0;font-weight:500}
.scale-block{margin:24px 0}
input[type=range]{width:100%}
.scale-labels{display:flex;justify-content:space-between;gap:20px;font-size:.85rem;color:var(--muted)}
.center{text-align:center}
.hidden{display:none}
@media(max-width:640px){
  .app-shell{margin:14px auto}
  .card{padding:20px}
  .grid-2{grid-template-columns:1fr;gap:0}
  .task-header{align-items:flex-start}
  .scale-labels{font-size:.76rem}
}

h3{margin-top:24px;margin-bottom:12px;line-height:1.3}