:root{
  --bg:#0f172a; --card:#ffffff; --ink:#1e293b; --muted:#64748b;
  --accent:#b91c1c; --accent2:#16a34a; --line:#e2e8f0; --soft:#f8fafc;
}
*{box-sizing:border-box}
body{margin:0;font-family:'Segoe UI',system-ui,-apple-system,Arial,sans-serif;background:var(--soft);color:var(--ink)}
.wrap{max-width:1050px;margin:0 auto;padding:16px}
.wrap.narrow{max-width:640px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px 20px;margin:16px 0;box-shadow:0 1px 3px rgba(15,23,42,.07)}
h1{margin:0 0 4px;font-size:1.7rem} h2{margin:0 0 14px;font-size:1.15rem;color:var(--muted);font-weight:600}
h3{margin:0 0 12px;font-size:1.05rem}
.muted{color:var(--muted)} .small{font-size:.82rem} .center{text-align:center}
.topbar{display:flex;justify-content:space-between;align-items:center;background:var(--bg);color:#fff;padding:12px 18px;border-radius:12px;margin-top:12px;flex-wrap:wrap;gap:8px}
.namelist{display:flex;flex-direction:column;gap:10px;margin:16px 0}
.btn{display:inline-block;background:var(--accent);color:#fff;border:none;border-radius:9px;padding:11px 16px;font-size:1rem;cursor:pointer;text-decoration:none;text-align:center}
.btn:hover{filter:brightness(1.08)} .btn.small{padding:6px 11px;font-size:.85rem}
.btn.ghost{background:transparent;border:1px solid rgba(255,255,255,.5)}
.btn.danger{background:#dc2626;padding:4px 9px;font-size:.78rem}
.btn.good{background:var(--accent2)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.namebtn{font-size:1.1rem;background:#fff;color:var(--ink);border:2px solid var(--line)}
.namebtn:hover{border-color:var(--accent)}
.savestatus{position:fixed;right:16px;bottom:14px;background:#16a34a;color:#fff;padding:6px 13px;border-radius:20px;font-size:.8rem;opacity:0;transition:opacity .3s;pointer-events:none}
.savestatus.show{opacity:1} .savestatus.saving{background:#d97706}
.grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
label{display:flex;flex-direction:column;font-size:.85rem;font-weight:600;gap:5px}
input,select{font:inherit;padding:9px 10px;border:1px solid #cbd5e1;border-radius:8px;background:#fff}
input:focus{outline:2px solid #93c5fd;border-color:#3b82f6}
.formula-box{background:#f1f5f9;border-left:4px solid var(--accent);border-radius:8px;padding:12px 14px;margin-top:14px;font-size:.9rem;line-height:1.55}
.formula-box code{background:#e2e8f0;padding:2px 8px;border-radius:6px;font-size:1rem}
.overview{display:flex;flex-wrap:wrap;gap:12px}
.stat{background:var(--soft);border:1px solid var(--line);border-radius:10px;padding:10px 16px;min-width:130px}
.stat .v{font-size:1.35rem;font-weight:700} .stat .l{font-size:.75rem;color:var(--muted);text-transform:uppercase;letter-spacing:.4px}
.coach{margin-top:12px;display:flex;flex-direction:column;gap:8px}
.coachmsg{border-radius:9px;padding:9px 13px;font-size:.88rem;border:1px solid}
.coachmsg.up{background:#f0fdf4;border-color:#bbf7d0;color:#166534}
.coachmsg.warn{background:#fffbeb;border-color:#fde68a;color:#92400e}
.tips{margin:0;padding-left:20px;display:grid;gap:8px;font-size:.92rem;line-height:1.5}
.addrow{display:flex;gap:10px;margin-bottom:14px}
.addrow input{flex:1}
.exercise{border:1px solid var(--line);border-radius:10px;margin-bottom:14px;overflow:hidden}
.ex-head{display:flex;align-items:center;gap:10px;background:#f1f5f9;padding:10px 14px;flex-wrap:wrap}
.ex-head .ex-name{font-weight:700;font-size:1.02rem;border:none;background:transparent;padding:4px 6px;border-radius:6px;flex:1;min-width:160px}
.ex-head .ex-name:hover,.ex-head .ex-name:focus{background:#fff;outline:1px solid #cbd5e1}
.badge{background:#e2e8f0;border-radius:20px;padding:3px 11px;font-size:.78rem;white-space:nowrap}
.badge.up{background:#dcfce7;color:#166534}.badge.down{background:#fee2e2;color:#991b1b}.badge.flat{background:#fef9c3;color:#854d0e}
.ex-body{padding:12px 14px}
table.log{width:100%;border-collapse:collapse;font-size:.87rem}
table.log th{background:var(--soft);color:var(--muted);font-size:.72rem;text-transform:uppercase;letter-spacing:.4px}
table.log th,table.log td{border:1px solid var(--line);padding:5px 7px;text-align:center}
table.log td input{width:100%;border:none;background:transparent;text-align:center;padding:4px}
table.log td input:focus{background:#eff6ff;outline:1px solid #93c5fd;border-radius:4px}
table.log td.note-cell{min-width:130px}
.newsession{display:flex;gap:8px;flex-wrap:wrap;align-items:flex-end;margin-top:10px;background:var(--soft);border-radius:9px;padding:10px}
.newsession label{font-size:.72rem;text-transform:uppercase;letter-spacing:.4px;color:var(--muted)}
.newsession input{width:110px}
.newsession input.note-in{width:200px}
.chart{margin-top:12px}
.chart svg{width:100%;height:130px;background:#fbfdff;border:1px solid var(--line);border-radius:8px}
.empty{color:var(--muted);font-size:.9rem;padding:8px 2px}
.msg{font-size:.85rem;margin-top:8px}
.msg.err{color:#b91c1c}
a{color:var(--accent)}
@media(max-width:640px){.newsession input{width:100%}}