:root {
  --bg: #f4f6f8;
  --card: #ffffff;
  --primary: #1d4ed8;
  --primary-dark: #1e3a8a;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --danger: #dc2626;
  --good: #059669;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}
#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
}
.login-box {
  background: var(--card);
  padding: 32px;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  width: 320px;
}
.login-box h1 { font-size: 18px; margin-bottom: 4px; }
.login-box p { color: var(--muted); font-size: 13px; margin-top: 0; }
.login-box input {
  width: 100%; padding: 10px; margin-bottom: 12px;
  border: 1px solid var(--border); border-radius: 8px; font-size: 14px;
}
.login-box button, .btn {
  width: 100%; padding: 10px; background: var(--primary); color: white;
  border: none; border-radius: 8px; font-size: 14px; cursor: pointer;
}
.login-box button:hover, .btn:hover { background: var(--primary-dark); }
#error-msg { color: var(--danger); font-size: 13px; min-height: 18px; }

header {
  background: var(--card);
  padding: 12px 20px;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--border);
}
header h1 { font-size: 16px; margin: 0; }
header .user-info { font-size: 13px; color: var(--muted); display: flex; gap: 12px; align-items: center; }

.layout { display: flex; min-height: calc(100vh - 53px); }
nav.tabs {
  width: 210px; background: var(--card); border-right: 1px solid var(--border);
  padding: 12px 0; flex-shrink: 0;
}
nav.tabs button {
  display: block; width: 100%; text-align: left; padding: 10px 18px;
  background: none; border: none; font-size: 13.5px; cursor: pointer; color: var(--text);
}
nav.tabs button.active { background: #eef2ff; color: var(--primary); font-weight: 600; border-right: 3px solid var(--primary); }
nav.tabs button:hover { background: #f3f4f6; }

main { flex: 1; padding: 20px; overflow-x: auto; }
.filters { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; align-items: center; }
.filters select, .filters input { padding: 7px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; }
.filters button { padding: 7px 14px; border-radius: 6px; border: none; background: var(--primary); color: white; cursor: pointer; font-size: 13px; }

.card {
  background: var(--card); border-radius: 10px; padding: 16px;
  margin-bottom: 16px; box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}
.card h2 { font-size: 14px; margin: 0 0 12px 0; color: var(--text); }
.disclaimer {
  background: #fffbeb; border: 1px solid #fde68a; color: #92400e;
  padding: 8px 12px; border-radius: 8px; font-size: 12.5px; margin-bottom: 12px;
}
.kpi-row { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.kpi { background: var(--card); border-radius: 10px; padding: 14px 18px; min-width: 150px; box-shadow: 0 1px 4px rgba(0,0,0,0.05); }
.kpi .value { font-size: 22px; font-weight: 700; color: var(--primary-dark); }
.kpi .label { font-size: 12px; color: var(--muted); margin-top: 2px; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }
tr:hover { background: #f9fafb; }
canvas { max-height: 320px; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 600; }
.badge.good { background: #d1fae5; color: var(--good); }
.badge.warn { background: #fef3c7; color: #92400e; }
.badge.muted { background: #f3f4f6; color: var(--muted); }

#upload-drop {
  border: 2px dashed var(--border); border-radius: 10px; padding: 30px;
  text-align: center; color: var(--muted); cursor: pointer; margin-bottom: 16px;
}
#upload-drop.dragover { border-color: var(--primary); background: #eef2ff; }
.hidden { display: none !important; }
.loading { color: var(--muted); font-size: 13px; padding: 20px; text-align: center; }