:root{
  --bg:#0a0c10; --panel:#11141b; --panel2:#171b24; --line:#1f2530;
  --text:#ecf0f6; --muted:#8a93a5; --accent:#2dd4a7; --accent-dim:#1a8f72;
  --danger:#e05d5d; --radius:14px;
}
*{box-sizing:border-box;margin:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg); color:var(--text);
  font:15px/1.55 -apple-system,"Segoe UI",Roboto,sans-serif;
  min-height:100vh; display:flex; flex-direction:column;
}
a{color:var(--accent);text-decoration:none}
button{font:inherit;cursor:pointer;border:none;border-radius:9px}
input,select{
  font:inherit;color:var(--text);background:var(--panel2);
  border:1px solid var(--line);border-radius:9px;padding:8px 12px;outline:none;
}
input:focus,select:focus{border-color:var(--accent-dim)}

/* top bar */
#topbar{
  display:flex;align-items:center;gap:20px;padding:14px 22px;
  border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(10,12,16,.92);
  backdrop-filter:blur(8px);z-index:20;
}
.brand{font-size:19px;font-weight:700;letter-spacing:-.02em;color:var(--text)}
.brand span{color:var(--accent)}
#nav{display:flex;gap:4px;flex:1}
#nav a{color:var(--muted);padding:6px 12px;border-radius:8px;font-size:14px}
#nav a.active{color:var(--text);background:var(--panel2)}
#authbox{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted)}
#authbox .who{max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.btn{background:var(--panel2);color:var(--text);border:1px solid var(--line);padding:8px 14px}
.btn:hover{border-color:var(--accent-dim)}
.btn.primary{background:var(--accent);color:#04120d;font-weight:600;border:none}
.btn.primary:hover{background:#3ee6b8}
.btn.danger{color:var(--danger)}
.btn.sm{padding:5px 10px;font-size:13px;border-radius:7px}
.btn:disabled{opacity:.45;cursor:default}

main{flex:1;width:100%;max-width:1180px;margin:0 auto;padding:26px 22px 60px}
h1{font-size:22px;letter-spacing:-.02em;margin-bottom:4px}
h2{font-size:16px;margin-bottom:10px}
.sub{color:var(--muted);font-size:13.5px;margin-bottom:20px}

/* library */
.filters{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 6px;align-items:center}
.filters input[type=search]{flex:1;min-width:220px}
.chips{display:flex;gap:6px;flex-wrap:wrap;margin:10px 0 18px}
.chip{
  background:var(--panel2);border:1px solid var(--line);color:var(--muted);
  padding:5px 12px;border-radius:999px;font-size:12.5px;
}
.chip.on{color:#04120d;background:var(--accent);border-color:var(--accent);font-weight:600}
.count{color:var(--muted);font-size:13px;margin:0 0 14px}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(168px,1fr));gap:14px}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;cursor:pointer;transition:border-color .15s;
}
.card:hover{border-color:var(--accent-dim)}
.card img{width:100%;aspect-ratio:1;object-fit:cover;background:#fff;display:block}
.card .cb{padding:10px 12px}
.card .nm{font-size:13.5px;font-weight:600;line-height:1.3;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card .mt{color:var(--muted);font-size:11.5px;margin-top:4px;text-transform:capitalize}

/* overlay / modal */
#overlay{
  position:fixed;inset:0;background:rgba(4,6,10,.72);z-index:50;
  display:flex;align-items:flex-start;justify-content:center;overflow-y:auto;padding:5vh 16px 40px;
}
#overlay.hidden,.hidden{display:none}
.modal{
  background:var(--panel);border:1px solid var(--line);border-radius:18px;
  width:100%;max-width:640px;padding:26px;position:relative;
}
.modal .close{position:absolute;top:14px;right:14px;background:var(--panel2);width:32px;height:32px;border-radius:8px;color:var(--muted)}
.modal h2{font-size:19px;text-transform:capitalize;padding-right:40px}
.exhead{display:flex;gap:20px;margin:16px 0}
.exhead img{width:220px;height:220px;border-radius:12px;background:#fff;flex-shrink:0}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.tag{background:var(--panel2);border:1px solid var(--line);border-radius:6px;padding:3px 9px;font-size:12px;color:var(--muted);text-transform:capitalize}
.tag b{color:var(--text);font-weight:600}
.steps{margin:14px 0 4px;padding-left:20px;display:grid;gap:8px;font-size:14px;color:#c9d1de}
.attr{font-size:11.5px;color:var(--muted);margin-top:14px}
.langsel{margin-left:auto}

/* auth */
.authcard{max-width:380px;margin:8vh auto;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:30px}
.authcard form{display:grid;gap:12px;margin-top:18px}
.authcard .alt{margin-top:14px;font-size:13px;color:var(--muted)}
.err{color:var(--danger);font-size:13px}

/* workouts */
.wlist{display:grid;gap:12px;max-width:760px}
.wrow{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px 18px;display:flex;align-items:center;gap:14px;
}
.wrow .grow{flex:1;min-width:0}
.wrow .nm{font-weight:600}
.wrow .mt{color:var(--muted);font-size:12.5px;margin-top:2px}
.itemrow{
  display:flex;align-items:center;gap:12px;background:var(--panel);
  border:1px solid var(--line);border-radius:12px;padding:10px 14px;
}
.itemrow img{width:52px;height:52px;border-radius:9px;background:#fff}
.itemrow .grow{flex:1;min-width:0}
.itemrow .nm{font-size:14px;font-weight:600;line-height:1.3}
.itemrow .mt{font-size:12px;color:var(--muted);text-transform:capitalize}
.itemrow input{width:64px;text-align:center;padding:6px}
.ilist{display:grid;gap:10px;max-width:760px;margin-top:14px}
.rowbar{display:flex;gap:10px;align-items:center;margin:18px 0;max-width:760px}
.rowbar input{flex:1}

/* session runner */
.sess{max-width:760px;display:grid;gap:14px}
.sessx{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.sessx header{display:flex;gap:12px;align-items:center;border:none;padding:0;margin-bottom:10px;position:static;background:none}
.sessx header img{width:56px;height:56px;border-radius:10px;background:#fff}
.sethead,.setrow{display:grid;grid-template-columns:44px 1fr 1fr 40px;gap:10px;align-items:center}
.sethead{font-size:11.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;margin:6px 0 2px}
.setrow{margin-top:6px}
.setrow input{width:100%;text-align:center}
.setrow .no{color:var(--muted);font-size:13px;text-align:center}
.xdel{background:none;color:var(--muted);font-size:16px}
.xdel:hover{color:var(--danger)}

/* history */
.hrow{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;max-width:760px;margin-bottom:12px}
.hrow .top{display:flex;align-items:center;gap:12px;cursor:pointer}
.hrow .nm{font-weight:600;flex:1}
.hrow .mt{color:var(--muted);font-size:12.5px}
.hdetail{margin-top:12px;border-top:1px solid var(--line);padding-top:12px;display:grid;gap:8px;font-size:13.5px}
.hdetail .ex b{text-transform:capitalize}
.hdetail .ex span{color:var(--muted)}

.empty{color:var(--muted);padding:40px 0;text-align:center}
.pager{display:flex;gap:10px;justify-content:center;margin:26px 0 0}

#toast{
  position:fixed;bottom:26px;left:50%;transform:translateX(-50%);z-index:80;
  background:var(--panel2);border:1px solid var(--accent-dim);color:var(--text);
  padding:10px 18px;border-radius:10px;font-size:14px;box-shadow:0 8px 30px rgba(0,0,0,.5);
}
footer{
  border-top:1px solid var(--line);color:var(--muted);font-size:12px;
  padding:16px 22px;display:flex;gap:8px;justify-content:center;flex-wrap:wrap;
}
footer .sep{opacity:.5}

@media (max-width:640px){
  #topbar{padding:10px 14px;gap:10px;flex-wrap:wrap}
  #nav{order:3;width:100%;justify-content:space-around}
  main{padding:18px 14px 50px}
  .exhead{flex-direction:column}
  .exhead img{width:100%;height:auto;aspect-ratio:1}
  .grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}
}