:root {
  --bg: #f0ede8;
  --card: #fff;
  --dark: #1c1712;
  --accent: #b5813f;
  --accent2: #6b9e8a;
  --text: #2a2420;
  --muted: #7a6e68;
  --border: #ddd5c8;
  --danger: #8b2020;
  --success: #1a5c2e;
  --info: #1a3a5c;
  --line: #e7e1d8;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, sans-serif; color: var(--text); background: var(--bg); }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small-text { font-size: 12px; }
.login-screen { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.login-card { width: min(420px, 100%); background: var(--card); border: 1px solid var(--border); border-radius: 18px; padding: 24px; box-shadow: 0 8px 30px rgba(0,0,0,.06); }
.login-card h1 { margin: 0 0 6px; }
.login-card p { margin: 0 0 18px; color: var(--muted); }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 14px 20px; background: var(--dark); color: #fff; }
.brand { display: flex; gap: 12px; align-items: center; }
.topbar-actions { display: flex; gap: 12px; align-items: center; }
.layout { display: grid; grid-template-columns: 390px 1fr; gap: 18px; padding: 18px; }
.sidebar { display: grid; gap: 14px; align-content: start; }
.workspace { display: grid; gap: 18px; }
.grid-two { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 16px; box-shadow: 0 8px 24px rgba(0,0,0,.04); }
.card h2 { margin: 0 0 14px; font-size: 18px; }
label { display: block; margin: 0 0 6px; font-size: 13px; color: var(--muted); }
input, select, textarea, button { width: 100%; font: inherit; }
input, select, textarea { border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; background: #fff; color: var(--text); margin-bottom: 10px; }
textarea { resize: vertical; min-height: 120px; }
button { border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; background: #fff; color: var(--text); cursor: pointer; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 700; }
.button-stack { display: grid; gap: 10px; }
canvas { width: 100%; height: auto; display: block; background: #fff; border: 1px solid #ddd; border-radius: 10px; }
#threeHost { border: 1px solid #ddd; border-radius: 10px; overflow: hidden; background: #fff; }
#threeHost canvas { display: block; }
.poly-tools { margin: 8px 0 10px; }
.poly-tools button { width: auto; }
#polygonEditorCanvas { width: 100%; height: auto; display: block; background: #fff; border: 1px solid #d8d2ca; border-radius: 10px; margin-top: 10px; }
.bench-list { display: grid; gap: 12px; }
.bench-row { display: grid; grid-template-columns: 110px 1fr 1fr 1fr 110px; gap: 10px; padding: 12px; border: 1px solid var(--line); border-radius: 12px; background: #faf8f5; align-items: end; }
.bench-check { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.bench-check input { width: auto; margin: 0; }
.bench-actions { display: flex; align-items: end; }
.metric { display: flex; justify-content: space-between; gap: 12px; padding: 6px 0; border-bottom: 1px solid #eee; }
.badge { display: block; margin: 6px 0; padding: 8px 10px; border-radius: 10px; font-size: 13px; }
.badge.alert { background: #fff3f3; color: #8b2020; border: 1px solid #efc9c9; }
.badge.reco { background: #f4faf7; color: #1a5c2e; border: 1px solid #cae6d2; }
.history-item { padding: 10px 0; border-bottom: 1px solid #eee; }
.history-item button { margin-top: 6px; }
.message { margin-top: 10px; min-height: 20px; color: var(--danger); font-size: 13px; }
@media (max-width: 1200px) { .layout { grid-template-columns: 1fr; } .grid-two { grid-template-columns: 1fr; } }
@media (max-width: 1100px) { .bench-row { grid-template-columns: 1fr; } }