:root{
  --bg:#0e0b14;
  --bg2:#171020;
  --card:#1d1429;
  --card2:#241734;
  --text:#f5efff;
  --muted:#b8a8d4;
  --line:rgba(255,255,255,.08);
  --gold:#e3b86c;
  --violet:#8d63ff;
  --violet2:#caa6ff;
  --green:#4bd6a8;
  --red:#ff7171;
  --yellow:#ffd36a;
  --shadow:0 20px 40px rgba(0,0,0,.35);
  --radius:24px;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at top right, rgba(141,99,255,.15), transparent 28%),
    radial-gradient(circle at top left, rgba(227,184,108,.08), transparent 18%),
    linear-gradient(180deg, #0d0913 0%, #120d1a 100%);
  min-height:100vh;
}
.app-shell{max-width:1320px; margin:0 auto; padding:24px}
.topbar{
  display:flex; justify-content:space-between; gap:24px; align-items:flex-start; margin-bottom:24px;
}
.eyebrow{color:var(--gold); font-size:.82rem; text-transform:uppercase; letter-spacing:.14em}
h1{margin:.2rem 0; font-size:clamp(2rem,3vw,3rem)}
.subtitle{margin:0; color:var(--muted); max-width:720px}
.screen{display:none}
.screen.active{display:block}
.hero-card{
  display:grid; grid-template-columns: 1.7fr 1fr; gap:20px;
  background:linear-gradient(180deg, rgba(36,23,52,.95), rgba(24,16,35,.96));
  border:1px solid var(--line); border-radius:32px; box-shadow:var(--shadow); padding:28px; margin-bottom:22px;
}
.hero-copy h2{font-size:clamp(2rem,3vw,3.6rem); line-height:1.02; margin:.35rem 0 1rem}
.hero-copy h2 span{color:var(--gold)}
.hero-copy p{max-width:720px; color:var(--muted); font-size:1.05rem}
.badge{
  display:inline-flex; border:1px solid rgba(227,184,108,.28); color:var(--gold); padding:8px 12px;
  border-radius:999px; background:rgba(227,184,108,.08); font-size:.88rem;
}
.status-panel, .panel, .sidebar-card, .shelf-card, .report-card, .base-card, .metric-card{
  background:linear-gradient(180deg, rgba(34,22,48,.95), rgba(22,15,31,.97));
  border:1px solid var(--line); border-radius:var(--radius); box-shadow:var(--shadow);
}
.status-panel{padding:20px}
.status-grid{display:grid; grid-template-columns:1fr 1fr; gap:12px}
.metric-card{padding:14px}
.metric-label{display:block; color:var(--muted); font-size:.82rem; margin-bottom:6px}
.metric-card strong{font-size:1.4rem}
.shelf-grid{display:grid; grid-template-columns:1.2fr 1fr 1fr; gap:18px}
.shelf-card{padding:20px}
.mode-grid{display:grid; grid-template-columns:1fr; gap:12px}
.mode-card{
  width:100%; text-align:left; background:rgba(255,255,255,.03); color:var(--text);
  border:1px solid var(--line); border-radius:18px; padding:16px; cursor:pointer;
}
.mode-card.active{outline:2px solid var(--violet)}
.mode-card span{display:block; font-weight:700}
.mode-card small{color:var(--muted)}
.level-track{padding-left:20px; color:var(--muted); line-height:1.9}
.quick-actions{display:flex; flex-wrap:wrap; gap:10px}
.quick-actions.vertical{flex-direction:column}
.panel{padding:24px}
.panel-head{display:flex; justify-content:space-between; gap:16px; align-items:flex-start; margin-bottom:18px}
.base-grid, .report-grid, .retro-grid{display:grid; gap:16px}
.base-grid{grid-template-columns:repeat(2,1fr)}
.base-card{padding:18px}
.game-rules{margin-top:18px; padding:18px; border-radius:20px; border:1px dashed rgba(227,184,108,.24); background:rgba(227,184,108,.05)}
.game-grid{display:grid; grid-template-columns:320px 1fr; gap:20px}
.sidebar{display:flex; flex-direction:column; gap:16px}
.sidebar-card{padding:18px}
.pill-stack{display:flex; flex-wrap:wrap; gap:8px}
.pill{
  display:inline-flex; padding:8px 10px; border-radius:999px; font-size:.8rem;
  background:rgba(255,255,255,.05); border:1px solid var(--line); color:var(--muted)
}
.question-card{padding:22px; border-radius:24px; background:rgba(255,255,255,.03); border:1px solid var(--line)}
.question-card p{font-size:1.08rem; line-height:1.6; margin-top:0}
.options-wrap{display:grid; gap:12px}
.option-btn{
  display:flex; gap:12px; align-items:flex-start; width:100%;
  background:rgba(255,255,255,.03); border:1px solid var(--line); border-radius:18px;
  color:var(--text); padding:16px; text-align:left; cursor:pointer;
}
.option-btn.selected{border-color:var(--violet); box-shadow:0 0 0 1px rgba(141,99,255,.32) inset}
.option-letter{
  min-width:32px; height:32px; border-radius:999px; display:flex; align-items:center; justify-content:center;
  background:rgba(141,99,255,.18); color:var(--violet2); font-weight:700;
}
.feedback-card{
  margin-top:18px; padding:20px; border-radius:20px; border:1px solid var(--line);
  background:rgba(255,255,255,.04)
}
.feedback-card.correct{border-color:rgba(75,214,168,.35); background:rgba(75,214,168,.08)}
.feedback-card.incorrect{border-color:rgba(255,113,113,.35); background:rgba(255,113,113,.08)}
.feedback-card h3{margin-top:0}
.feedback-card .mini-title{color:var(--gold); margin-top:16px; margin-bottom:6px; font-size:.92rem}
.timer-wrap{
  min-width:100px; text-align:center; padding:12px 16px; border-radius:18px; background:rgba(255,255,255,.03); border:1px solid var(--line);
}
.hidden{display:none!important}
.report-grid{grid-template-columns:repeat(2,1fr)}
.report-card{padding:18px}
.report-card.highlight{
  display:flex; flex-direction:column; justify-content:center; align-items:flex-start;
  background:linear-gradient(180deg, rgba(141,99,255,.20), rgba(227,184,108,.11));
}
.report-card.highlight strong{font-size:3rem}
.report-card ul{padding-left:18px; color:var(--muted); line-height:1.7}
.cta-row{display:flex; flex-wrap:wrap; gap:12px; margin-top:18px}
button{
  font:inherit; cursor:pointer; border:none;
}
.primary-btn, .secondary-btn, .ghost-btn{
  padding:14px 18px; border-radius:16px; transition:.2s ease; min-height:48px;
}
.primary-btn{background:linear-gradient(135deg, var(--violet), #6747d8); color:#fff; font-weight:700}
.secondary-btn{background:rgba(255,255,255,.07); color:var(--text); border:1px solid var(--line)}
.ghost-btn{background:transparent; color:var(--muted); border:1px solid var(--line)}
.small{padding:10px 12px; min-height:auto}
.primary-btn:hover,.secondary-btn:hover,.ghost-btn:hover,.mode-card:hover,.option-btn:hover{transform:translateY(-1px)}
.correct-text{color:var(--green)}
.incorrect-text{color:var(--red)}
.warn-text{color:var(--yellow)}
@media (max-width: 1024px){
  .hero-card,.shelf-grid,.game-grid,.report-grid,.base-grid{grid-template-columns:1fr}
}
@media (max-width: 680px){
  .app-shell{padding:16px}
  .topbar{flex-direction:column}
}