:root {
  --bg: #f4f6f8;
  --card: #ffffff;
  --ink: #1f2933;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --border: #e2e8f0;
  --ok: #16a34a;
  --fail: #dc2626;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.5 -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex; align-items: center; gap: 24px;
  background: var(--card); border-bottom: 1px solid var(--border);
  padding: 12px 24px;
}
.topbar .brand a { font-weight: 700; color: var(--ink); }
.topbar nav { display: flex; gap: 18px; }
.topbar .user { margin-left: auto; color: var(--muted); display: flex; gap: 12px; align-items: center; }
.topbar .logout { color: var(--muted); }

.container { max-width: 1100px; margin: 0 auto; padding: 24px; }
h1 { font-size: 22px; margin: 0 0 12px; }
h2 { font-size: 18px; margin: 28px 0 12px; }
.muted { color: var(--muted); }

label { display: block; margin: 10px 0; font-size: 14px; color: var(--muted); }
label.checkbox { display: flex; align-items: center; gap: 8px; color: var(--ink); }
input[type=text], input[type=password], textarea, select {
  display: block; width: 100%; margin-top: 4px; padding: 9px 11px;
  border: 1px solid var(--border); border-radius: 8px; font: inherit; color: var(--ink);
  background: #fff;
}
textarea { resize: vertical; }
.row { display: flex; gap: 16px; flex-wrap: wrap; }
.row > label { flex: 1; min-width: 180px; }

button {
  background: var(--accent); color: #fff; border: 0; border-radius: 8px;
  padding: 10px 18px; font: inherit; font-weight: 600; cursor: pointer; margin-top: 8px;
}
button:hover { background: var(--accent-dark); }

.login-box { max-width: 360px; margin: 8vh auto; background: var(--card);
  padding: 28px; border-radius: 14px; border: 1px solid var(--border); }
.login-box button { width: 100%; }

.search-form { background: var(--card); padding: 18px; border-radius: 12px;
  border: 1px solid var(--border); margin-bottom: 20px; }

.alert { padding: 11px 14px; border-radius: 8px; background: #eef2ff; margin: 14px 0; }
.alert.error { background: #fef2f2; color: var(--fail); }

.grid { width: 100%; border-collapse: collapse; background: var(--card);
  border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.grid th, .grid td { padding: 9px 12px; text-align: left; border-bottom: 1px solid var(--border); }
.grid th { background: #f8fafc; font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: .03em; }
.grid td.num { text-align: right; font-variant-numeric: tabular-nums; }
.grid tr:last-child td { border-bottom: 0; }
.results tr.analog { background: #fbfaf5; }
.results tr.analog td:last-child { color: var(--muted); }
code { background: #eef2f7; padding: 1px 6px; border-radius: 5px; }

.group { margin: 16px 0; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: var(--card); }
.group.analog { opacity: .96; }
.group-head { display: flex; justify-content: space-between; align-items: center;
  gap: 12px; padding: 12px 16px; background: #f8fafc; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.ghead-main { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.gcode { font-weight: 700; font-size: 16px; }
.gname { color: var(--ink); }
.gbrand { color: var(--muted); font-size: 13px; }
.ghead-sum { display: flex; gap: 14px; align-items: center; font-size: 14px; }
.sum-price { font-weight: 700; color: var(--ok); }
.sum-days { color: var(--muted); }
.sum-count { color: var(--muted); }
.group .grid { border: 0; border-radius: 0; }
.results tr.best-price { background: #f0fdf4; }
.results td.price { font-weight: 700; }
.results td.fast { color: var(--accent-dark); font-weight: 600; }
.tags { white-space: nowrap; }
.badge { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; margin-left: 4px; }
.badge-cheap { background: #dcfce7; color: #166534; }
.badge-fast { background: #dbeafe; color: #1e40af; }
.badge-analog { background: #fef3c7; color: #92400e; }

.checks { margin: 16px 0; }
.check { display: flex; align-items: center; gap: 10px; padding: 10px 14px;
  background: var(--card); border: 1px solid var(--border); border-radius: 10px; margin-bottom: 8px; }
.check .dot { width: 10px; height: 10px; border-radius: 50%; }
.check.ok .dot { background: var(--ok); }
.check.fail .dot { background: var(--fail); }
.check .detail { color: var(--muted); margin-left: 6px; }