:root {
  --bg: #0f1419;
  --surface: #1a212b;
  --surface-2: #232c38;
  --border: #2e3a48;
  --text: #e6edf3;
  --muted: #8b98a5;
  --primary: #2f81f7;
  --primary-d: #1f6feb;
  --green: #3fb950;
  --red: #f85149;
  --amber: #d29922;
  --radius: 10px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.45;
}
a { color: var(--primary); }
.loader { padding: 48px; text-align: center; color: var(--muted); }

/* ---------- Layout ---------- */
header.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 12px;
  padding: 10px 16px; background: var(--surface);
  border-bottom: 1px solid var(--border); flex-wrap: wrap;
}
.topbar .brand { font-weight: 700; font-size: 16px; }
.topbar .spacer { flex: 1; }
.topbar select, .topbar .user { font-size: 14px; }
.topbar .user { color: var(--muted); }

nav.tabs {
  display: flex; gap: 4px; overflow-x: auto; padding: 8px 12px;
  background: var(--surface); border-bottom: 1px solid var(--border);
  position: sticky; top: 52px; z-index: 9;
}
nav.tabs button {
  white-space: nowrap; background: transparent; border: none; color: var(--muted);
  padding: 8px 12px; border-radius: 8px; cursor: pointer; font-size: 14px;
}
nav.tabs button.active { background: var(--surface-2); color: var(--text); }

main { max-width: 980px; margin: 0 auto; padding: 16px; }
h2 { margin: 0 0 12px; font-size: 20px; }
h3 { margin: 18px 0 8px; font-size: 16px; }

/* ---------- Cards / grid ---------- */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px; margin-bottom: 16px;
}
.grid { display: grid; gap: 12px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 700px) { .grid.cols-2, .grid.cols-3 { grid-template-columns: 1fr; } }

.stat { background: var(--surface-2); border-radius: 8px; padding: 12px 14px; }
.stat .label { color: var(--muted); font-size: 13px; }
.stat .value { font-size: 22px; font-weight: 700; margin-top: 2px; }
.value.pos { color: var(--green); } .value.neg { color: var(--red); }

/* ---------- Forms ---------- */
label { display: block; font-size: 13px; color: var(--muted); margin: 8px 0 4px; }
input, select, textarea {
  width: 100%; padding: 9px 10px; background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px; font-size: 14px;
}
input:focus, select:focus { outline: none; border-color: var(--primary); }
.row { display: flex; gap: 10px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 120px; }

button.btn {
  background: var(--primary); color: #fff; border: none; padding: 9px 14px;
  border-radius: 8px; cursor: pointer; font-size: 14px; font-weight: 600;
}
button.btn:hover { background: var(--primary-d); }
button.btn.ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
button.btn.sm { padding: 5px 9px; font-size: 13px; }
button.btn.danger { background: var(--red); }
button.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ---------- Tables ---------- */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; }
td.num, th.num { text-align: right; }
.table-wrap { overflow-x: auto; }

/* ---------- Badges ---------- */
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; }
.badge.green { background: rgba(63,185,80,.15); color: var(--green); }
.badge.red { background: rgba(248,81,73,.15); color: var(--red); }
.badge.amber { background: rgba(210,153,34,.15); color: var(--amber); }
.badge.muted { background: var(--surface-2); color: var(--muted); }

/* ---------- Auth ---------- */
.auth-wrap { max-width: 380px; margin: 8vh auto; padding: 0 16px; }
.auth-wrap .card { padding: 24px; }
.auth-wrap h1 { font-size: 22px; margin: 0 0 4px; }
.auth-wrap .sub { color: var(--muted); margin-bottom: 16px; }
.switch-link { text-align: center; margin-top: 14px; font-size: 14px; }

/* ---------- Misc ---------- */
.notice { padding: 10px 12px; border-radius: 8px; font-size: 14px; margin-bottom: 12px; }
.notice.error { background: rgba(248,81,73,.12); color: var(--red); border: 1px solid rgba(248,81,73,.3); }
.notice.warn { background: rgba(210,153,34,.12); color: var(--amber); border: 1px solid rgba(210,153,34,.3); }
.notice.ok { background: rgba(63,185,80,.12); color: var(--green); border: 1px solid rgba(63,185,80,.3); }
.muted { color: var(--muted); }
.toolbar { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; margin-bottom: 12px; }
.toolbar > * { flex: 0 0 auto; }
.right { text-align: right; }
.hidden { display: none !important; }
canvas { max-height: 280px; }
#toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text);
  padding: 10px 16px; border-radius: 8px; opacity: 0; transition: opacity .2s; z-index: 100;
}
#toast.show { opacity: 1; }