:root {
  --bg: #f4f6f8;
  --text: #17202a;
  --muted: #667085;
  --line: #d9dee7;
  --panel: #ffffff;
  --green: #12805c;
  --red: #c0392b;
  --blue: #1f6feb;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--blue); text-decoration: none; }
.topbar { height: 58px; display: flex; align-items: center; justify-content: space-between; padding: 0 28px; background: #fff; border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; color: var(--text); }
nav { display: flex; align-items: center; gap: 18px; }
nav form { margin: 0; }
.container { max-width: 1180px; margin: 28px auto; padding: 0 20px; }
h1 { font-size: 28px; margin: 0 0 20px; }
h2 { font-size: 18px; margin: 0 0 14px; }
.grid { display: grid; grid-template-columns: 360px 1fr; gap: 24px; align-items: start; }
.panel, .metric, .notice { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 18px; }
.upload { display: grid; gap: 16px; }
label { display: grid; gap: 8px; font-weight: 600; }
input { width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 6px; font: inherit; }
button { border: 1px solid var(--line); background: #fff; padding: 9px 12px; border-radius: 6px; cursor: pointer; font: inherit; }
.primary { background: var(--blue); color: #fff; border-color: var(--blue); font-weight: 700; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 10px 8px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: var(--muted); font-weight: 700; }
.cards { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-bottom: 18px; }
.metric span { color: var(--muted); display: block; margin-bottom: 8px; }
.metric strong { font-size: 26px; }
.good { color: var(--green); }
.bad { color: var(--red); }
.muted { color: var(--muted); }
.notice { margin: 0 0 18px; border-color: #f0c36d; background: #fff7e0; }
.notice p { margin: 4px 0; }
.auth { max-width: 380px; margin: 60px auto; }
.auth form { display: grid; gap: 14px; }
.error { color: var(--red); margin: 0; }
.heading-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
section + section { margin-top: 20px; }

@media (max-width: 820px) {
  .grid, .cards { grid-template-columns: 1fr; }
  .topbar { padding: 0 14px; }
}