:root { --bg:#0f1115; --card:#1b1f27; --fg:#eef1f6; --mut:#98a2b3; --acc:#4f8cff; }
* { box-sizing: border-box; }
body { margin:0; font-family: system-ui, sans-serif; background:var(--bg); color:var(--fg); font-size:18px; }
header { display:flex; justify-content:space-between; align-items:center; padding:12px 20px; background:var(--card); }
h1 { margin:0; font-size:22px; } h2 { margin:0 0 10px; font-size:18px; }
main { max-width:760px; margin:0 auto; padding:16px; display:grid; gap:14px; }
.card { background:var(--card); border-radius:14px; padding:16px; }
.row { display:flex; gap:10px; flex-wrap:wrap; margin:8px 0; }
.dims label { flex:1; color:var(--mut); font-size:14px; }
input { width:100%; padding:12px; border-radius:10px; border:1px solid #333a47; background:#12151b; color:var(--fg); font-size:18px; }
.row input { flex:1; }
button, #btn-csv { padding:12px 18px; border-radius:10px; border:0; background:#2c3442; color:var(--fg); font-size:18px; cursor:pointer; text-decoration:none; }
button.primary { background:var(--acc); }
button:disabled { opacity:.5; }
video, img { width:100%; border-radius:10px; margin:8px 0; }
small { color:var(--mut); }
#result { margin-top:10px; line-height:1.5; }
.kv { display:flex; justify-content:space-between; border-bottom:1px solid #2a303b; padding:4px 0; }
table { width:100%; border-collapse:collapse; font-size:15px; }
td, th { padding:6px 4px; border-bottom:1px solid #2a303b; text-align:left; }
.err { color:#ff7b7b; }
h3 { margin:14px 0 4px; font-size:16px; color:var(--mut); }
.filebtn { padding:12px 18px; border-radius:10px; background:#2c3442; cursor:pointer; }
.steps button { flex:1; }
.steps button.on { background:var(--acc); }
.inline { display:block; color:var(--mut); font-size:14px; margin:6px 0; }
#measure-canvas { width:100%; border-radius:10px; touch-action:none; background:#000; margin-top:8px; cursor:crosshair; }
#iso { width:100%; max-width:640px; background:#12151b; border-radius:10px; margin-top:8px; }
.kpis { display:grid; grid-template-columns:repeat(auto-fit,minmax(130px,1fr)); gap:10px; margin-bottom:12px; }
.kpi { background:#12151b; border-radius:10px; padding:10px; }
.kpi b { display:block; font-size:24px; } .kpi span { color:var(--mut); font-size:13px; }
canvas { max-width:100%; }