:root{
  --bg:#0b1020; --card:#151c2f; --card2:#1d2740; --text:#f7f8fb; --muted:#aab4c8;
  --accent:#79d18b; --accent2:#6bb9ff; --warn:#ffd166; --danger:#ff7b7b; --line:#2a3551;
  --radius:18px; --shadow:0 10px 30px rgba(0,0,0,.2)
}
*{box-sizing:border-box} html,body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
body{min-height:100vh;padding-bottom:88px;background:linear-gradient(180deg,#0a0f1e 0%,#0d1425 100%)}
button,input,select,textarea{font:inherit}
.topbar{position:sticky;top:0;z-index:10;display:flex;justify-content:space-between;align-items:center;padding:calc(18px + env(safe-area-inset-top)) 18px 14px;background:rgba(11,16,32,.92);backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.05)}
.eyebrow{font-size:11px;letter-spacing:.14em;color:var(--accent);font-weight:800}.topbar h1{margin:2px 0 0;font-size:28px}.icon-btn{width:40px;height:40px;border-radius:12px;border:1px solid var(--line);background:var(--card);color:var(--text);font-size:22px}
main{max-width:760px;margin:0 auto;padding:16px}.grid{display:grid;gap:12px}.card{background:var(--card);border:1px solid rgba(255,255,255,.06);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}
.card h2,.card h3{margin:0 0 8px}.muted{color:var(--muted)}.small{font-size:13px}.hero{padding:20px;background:linear-gradient(135deg,#17223a,#142f2a)}.hero .big{font-size:30px;font-weight:850;margin:4px 0 6px}.pill{display:inline-block;padding:6px 10px;border-radius:999px;background:#22304f;color:#dbe6ff;font-size:12px;margin:3px 5px 3px 0}.pill.good{background:#173c2b;color:#bdf3c8}.pill.warn{background:#4a3a16;color:#ffe6a0}
.primary,.secondary,.danger{border:0;border-radius:14px;padding:13px 16px;font-weight:800}.primary{background:var(--accent);color:#092312}.secondary{background:var(--card2);color:var(--text);border:1px solid var(--line)}.danger{background:#4a2026;color:#ffd8dd}.full{width:100%}.row{display:flex;gap:10px;align-items:center}.space{justify-content:space-between}.wrap{flex-wrap:wrap}.stack{display:grid;gap:10px}
label{font-size:13px;color:var(--muted);display:block;margin-bottom:5px}input,select,textarea{width:100%;background:#0f1629;color:var(--text);border:1px solid var(--line);border-radius:12px;padding:11px}input[type="checkbox"]{width:auto;transform:scale(1.25)}
.bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:20;display:grid;grid-template-columns:repeat(5,1fr);padding:8px 8px calc(8px + env(safe-area-inset-bottom));background:rgba(11,16,32,.96);backdrop-filter:blur(16px);border-top:1px solid rgba(255,255,255,.08)}.nav-btn{background:none;border:0;color:#8f9ab0;padding:5px 2px;display:grid;gap:2px;place-items:center}.nav-btn span{font-size:20px}.nav-btn small{font-size:10px}.nav-btn.active{color:var(--accent)}
.exercise{border-top:1px solid var(--line);padding:14px 0}.exercise:first-child{border-top:0}.exercise-title{font-weight:800;font-size:17px}.meta{display:flex;gap:6px;flex-wrap:wrap;margin:7px 0}.set-row{display:grid;grid-template-columns:42px 1fr 1fr 48px;gap:8px;align-items:center;margin-top:8px}.set-badge{height:36px;width:36px;border-radius:10px;background:var(--card2);display:grid;place-items:center;font-weight:800}.set-row input{padding:9px}.done-check{display:grid;place-items:center;height:38px;border-radius:10px;background:#10231a;border:1px solid #245035}.done-check input{accent-color:var(--accent)}
.progress{height:10px;border-radius:999px;background:#26314d;overflow:hidden}.progress>div{height:100%;background:var(--accent)}
.tabs{display:flex;gap:8px;overflow:auto;padding-bottom:4px}.tab{white-space:nowrap;border:1px solid var(--line);background:var(--card);color:var(--muted);padding:9px 12px;border-radius:999px}.tab.active{color:#092312;background:var(--accent);border-color:transparent;font-weight:800}
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.stat{background:var(--card2);border-radius:14px;padding:12px}.stat b{display:block;font-size:22px}.stat span{font-size:11px;color:var(--muted)}
.history-item{padding:12px 0;border-top:1px solid var(--line)}.history-item:first-child{border-top:0}.score{font-weight:850;color:var(--accent)}
dialog{width:min(92vw,520px);border:1px solid var(--line);border-radius:18px;background:var(--card);color:var(--text);padding:18px}dialog::backdrop{background:rgba(0,0,0,.7)}
.notice{border-left:4px solid var(--warn);background:#2f2a1b;padding:12px;border-radius:10px}.goodbox{border-left:4px solid var(--accent);background:#142b20;padding:12px;border-radius:10px}.dangerbox{border-left:4px solid var(--danger);background:#351d23;padding:12px;border-radius:10px}
@media (min-width:700px){.two{grid-template-columns:1fr 1fr}.bottom-nav{max-width:760px;left:50%;transform:translateX(-50%);border-radius:18px 18px 0 0}.topbar{padding-left:max(18px,calc((100vw - 760px)/2 + 18px));padding-right:max(18px,calc((100vw - 760px)/2 + 18px))}}
.reference-list{display:grid;margin-top:10px}.reference-row{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;text-align:left;background:transparent;color:var(--text);border:0;border-top:1px solid var(--line);padding:13px 2px}.reference-row:first-child{border-top:0}.reference-row small{display:block;color:var(--muted);font-weight:400;margin-top:3px}.chev{font-size:25px;color:var(--accent2);line-height:1}.exercise-link{width:100%;display:flex;justify-content:space-between;align-items:center;gap:10px;background:transparent;color:var(--text);border:0;padding:0;text-align:left}.exercise-link:active,.reference-row:active,.history-open:active{opacity:.7}.history-open{width:100%;background:transparent;color:var(--text);border:0;text-align:left}.history-note{margin-top:6px;color:var(--muted)}.steps{padding-left:22px;line-height:1.45}.steps li{margin:8px 0}.demo-link{display:block;text-align:center;text-decoration:none;margin-top:14px}.compact{padding:12px;margin-top:10px}.saved-set{display:flex;justify-content:space-between;gap:10px;border-top:1px solid var(--line);padding:9px 0;font-size:14px}.saved-set:first-of-type{margin-top:8px}.history-detail{margin-top:12px}.plan-ref{padding:12px 0}#detailModal{z-index:1001}