:root{
  --bg:#0f1419; --panel:#1a2129; --panel2:#222c37; --line:#2e3a47;
  --text:#e6edf3; --muted:#8b98a5; --accent:#4dabf7; --accent2:#ffd43b;
  --good:#51cf66; --warn:#ff922b; --bad:#ff6b6b; --night:#5c7cfa;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;line-height:1.45}
header{padding:24px 28px 8px;border-bottom:1px solid var(--line)}
h1{margin:0 0 4px;font-size:24px}
h2{font-size:17px;margin:0 0 14px}
.sub{color:var(--muted);font-size:13px}
.wrap{padding:20px 28px;max-width:1320px;margin:0 auto}
.grid{display:grid;gap:16px}
.kpis{grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px}
.kpi .v{font-size:24px;font-weight:700}
.kpi .l{color:var(--muted);font-size:12px;margin-top:2px;text-transform:uppercase;letter-spacing:.04em}
.kpi .x{font-size:12px;margin-top:6px;color:var(--muted)}
.two{grid-template-columns:1fr 1fr}
@media(max-width:900px){.two{grid-template-columns:1fr}}
canvas{max-width:100%}
.chartbox{position:relative;height:300px}
.controls{display:flex;flex-wrap:wrap;gap:14px;align-items:flex-end;margin-bottom:14px}
.ctrl{display:flex;flex-direction:column;gap:4px;font-size:12px;color:var(--muted)}
.ctrl input[type=number],.ctrl select{background:var(--panel2);border:1px solid var(--line);
  color:var(--text);padding:6px 8px;border-radius:6px;font-size:13px;width:120px}
.ctrl input[type=range]{width:180px}
/* calculator controls: two organized panels */
.calc-controls{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:16px}
@media(max-width:780px){.calc-controls{grid-template-columns:1fr}}
.ctrl-panel{background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:12px 14px}
.panel-title{font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);
  margin-bottom:10px;border-bottom:1px solid var(--line);padding-bottom:6px}
.ctrl-line{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:10px;font-size:13px;color:var(--text)}
.ctrl-line:last-child{margin-bottom:0}
.ctrl-lbl{min-width:118px;color:var(--muted)}
.ctrl-line .sep{color:var(--muted)}
.ctrl-line input[type=number]{width:50px;background:var(--bg);border:1px solid var(--line);
  color:var(--text);padding:5px 6px;border-radius:6px;font-size:13px;text-align:center}
.ctrl-line input[type=time]{background:var(--bg);border:1px solid var(--line);color:var(--text);
  padding:5px 6px;border-radius:6px;font-size:13px}
.ctrl-line select{background:var(--bg);border:1px solid var(--line);color:var(--text);
  padding:5px 6px;border-radius:6px;font-size:13px}
.ctrl-line input[type=range]{flex:1;min-width:130px}
.ctrl-line input:disabled,.ctrl-line select:disabled{opacity:.4;cursor:not-allowed}
table{width:100%;border-collapse:collapse;font-size:13px}
th,td{padding:8px 10px;text-align:right;border-bottom:1px solid var(--line)}
th:first-child,td:first-child{text-align:left}
th{color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.03em}
.pill{display:inline-block;padding:2px 8px;border-radius:20px;font-size:11px;font-weight:600}
.pill.good{background:#15331f;color:var(--good)}
.planrow input[type=text],.planrow input[type=number]{background:var(--panel2);border:1px solid var(--line);color:var(--text);
  padding:5px 6px;border-radius:5px;font-size:12px;width:100%}
.planrow input[type=checkbox]{width:16px;height:16px;cursor:pointer}
.planrow input[type=text]{min-width:120px}
.btn{background:var(--accent);color:#06243d;border:none;padding:8px 14px;border-radius:7px;
  font-weight:600;cursor:pointer;font-size:13px}
.btn.sec{background:var(--panel2);color:var(--text);border:1px solid var(--line)}
.btn.del{background:transparent;color:var(--bad);border:1px solid #5a2a2a;padding:4px 8px;font-size:12px}
.winner{outline:2px solid var(--good);outline-offset:-2px}
.ins{font-size:13px;margin:6px 0;padding-left:22px;position:relative}
.ins::before{content:"\203A";position:absolute;left:6px;color:var(--accent);font-weight:700}
.legtag{font-size:11px;color:var(--muted)}
.tabs{display:flex;gap:6px;margin-bottom:12px;flex-wrap:wrap}
.tab{padding:6px 14px;border-radius:7px;border:1px solid var(--line);background:var(--panel2);
  color:var(--muted);cursor:pointer;font-size:13px}
.tab.active{background:var(--accent);color:#06243d;border-color:var(--accent);font-weight:600}
small.help{color:var(--muted);font-size:11px}
.flex{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
/* heatmaps */
.hmcell{border-radius:2px;min-width:0}
.fillcard{display:flex;flex-direction:column}
.heatgrid{height:300px;flex:0 0 auto}
.daycell{border-radius:2px;min-width:0}
.scalebar{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--muted);margin-top:8px;flex:0 0 auto}
.swatch{width:14px;height:14px;border-radius:3px}

/* ---- app shell: header actions, sample banner ---- */
.header-row{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;flex-wrap:wrap}
.header-actions{display:flex;gap:8px;align-items:center;padding-top:6px}
#dashboard[hidden]{display:none}
.sample-banner{background:#2a2418;border:1px solid #5c4d1f;color:#ffe08a;
  padding:8px 14px;border-radius:8px;font-size:13px;margin:14px 0;display:flex;
  align-items:center;justify-content:space-between;gap:12px}
.sample-banner[hidden]{display:none}

/* ---- upload modal ---- */
.modal-overlay{position:fixed;inset:0;background:rgba(8,11,15,.82);backdrop-filter:blur(3px);
  display:flex;align-items:center;justify-content:center;padding:20px;z-index:50}
.modal-overlay[hidden]{display:none}
.modal{background:var(--panel);border:1px solid var(--line);border-radius:16px;
  max-width:560px;width:100%;padding:28px;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.modal h2{font-size:22px;margin:0 0 6px}
.modal .lead{color:var(--muted);font-size:14px;margin-bottom:18px}
.dropzone{border:2px dashed var(--line);border-radius:12px;padding:34px 20px;text-align:center;
  cursor:pointer;transition:border-color .15s,background .15s;background:var(--panel2)}
.dropzone:hover,.dropzone.drag{border-color:var(--accent);background:#1d2733}
.dropzone .big{font-size:15px;color:var(--text);margin-bottom:4px}
.dropzone .small{font-size:12px;color:var(--muted)}
.modal-actions{display:flex;gap:10px;align-items:center;margin-top:18px;flex-wrap:wrap}
.modal-error{color:var(--bad);font-size:13px;margin-top:14px;min-height:18px}
.instructions{background:var(--panel2);border:1px solid var(--line);border-radius:10px;
  padding:12px 14px;margin-top:18px;font-size:13px;color:var(--muted)}
.instructions b{color:var(--text)}
.instructions a{color:var(--accent)}
.instr-intro{margin:6px 0 8px}
.instr-steps{margin:0 0 12px;padding-left:20px}
.instr-steps li{margin:4px 0}
.instr-img{display:block;width:100%;max-width:480px;margin:4px auto 0;border:1px solid var(--line);
  border-radius:8px;background:#fff}
.spinner{display:inline-block;width:15px;height:15px;border:2px solid var(--line);
  border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite;vertical-align:-2px}
@keyframes spin{to{transform:rotate(360deg)}}