:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #1c2330;
  --muted: #5d6778;
  --border: #dfe3ea;
  --accent: #1f5fbf;
  --accent-text: #ffffff;
  --row-hover: #eef3fb;
  --danger: #b42318;
  --warn-bg: #fff4d6;
  --warn-text: #7a4b00;
  --bad-bg: #fde7e5;
  --bad-text: #9b1c12;
  --ok-bg: #e3f4e8;
  --ok-text: #16603a;
  --info-bg: #e6eefb;
  --info-text: #1f4d99;
  --shadow: 0 8px 30px rgba(20, 30, 50, 0.18);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161d;
    --panel: #1a2029;
    --text: #e6e9ef;
    --muted: #9aa4b4;
    --border: #2c3440;
    --accent: #5b93e6;
    --accent-text: #0b1220;
    --row-hover: #222b37;
    --danger: #f07167;
    --warn-bg: #3d3113;
    --warn-text: #f5d58a;
    --bad-bg: #3f1d1b;
    --bad-text: #f7a39c;
    --ok-bg: #173424;
    --ok-text: #94d9ad;
    --info-bg: #1c2b44;
    --info-text: #a9c6f2;
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.brand { font-weight: 700; font-size: 17px; margin-right: auto; }
.user { display: flex; align-items: center; gap: 10px; color: var(--muted); }
.user[hidden] { display: none; }
.user a { color: var(--accent); }

/* Sign-in and change-password pages */
.signin { max-width: 400px; margin: 8vh auto; padding: 0 16px; }
.signin .brand { margin-bottom: 18px; }
.signin h1 { font-size: 22px; margin: 0 0 12px; }
.signin form { display: grid; gap: 12px; }
.signin .error { margin: 0; }
.signin .btn { justify-self: start; }
.signin a { color: var(--accent); }
.portfolio { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.portfolio button {
  border: 0; background: transparent; color: var(--text);
  padding: 6px 14px; font: inherit; cursor: pointer;
}
.portfolio button + button { border-left: 1px solid var(--border); }
.portfolio button.active { background: var(--accent); color: var(--accent-text); }

.tabs {
  display: flex;
  gap: 2px;
  padding: 0 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.tabs button {
  border: 0; background: transparent; color: var(--muted);
  padding: 10px 12px; font: inherit; cursor: pointer; white-space: nowrap;
  border-bottom: 2px solid transparent;
}
.tabs button:hover { color: var(--text); }
.tabs button.active { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }

main { padding: 20px; max-width: 1500px; margin: 0 auto; }

.btn {
  border: 1px solid var(--border); background: var(--panel); color: var(--text);
  padding: 7px 14px; border-radius: 7px; font: inherit; cursor: pointer;
}
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
.btn.danger { color: var(--danger); }
.btn:disabled { opacity: 0.6; cursor: default; }
.icon { border: 0; background: none; color: var(--muted); font-size: 22px; cursor: pointer; line-height: 1; }

.toolbar { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.toolbar h1 { font-size: 20px; margin: 0 auto 0 0; }
.toolbar input[type=search], .toolbar input[type=month] {
  padding: 7px 10px; border: 1px solid var(--border); border-radius: 7px;
  background: var(--panel); color: var(--text); font: inherit;
}
.toolbar input[type=search] { width: 240px; }
.count { color: var(--muted); }
.hint { color: var(--muted); font-size: 13px; margin: -4px 0 12px; }

.table-wrap { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 8px 12px; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
th {
  font-weight: 600; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .03em;
  cursor: pointer; user-select: none; position: sticky; top: 0; background: var(--panel);
}
th.num, td.num { text-align: right; font-variant-numeric: tabular-nums; }
tbody tr { cursor: pointer; }
tbody tr:hover { background: var(--row-hover); }
tbody tr:last-child td { border-bottom: 0; }
td.notes { white-space: normal; min-width: 180px; max-width: 320px; color: var(--muted); }
.empty { padding: 30px; text-align: center; color: var(--muted); }

.badge {
  display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 12px; font-weight: 600;
  margin-right: 4px;
}
.badge.warn { background: var(--warn-bg); color: var(--warn-text); }
.badge.bad { background: var(--bad-bg); color: var(--bad-text); }
.badge.ok { background: var(--ok-bg); color: var(--ok-text); }
.badge.info { background: var(--info-bg); color: var(--info-text); }

/* Dashboard */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; margin-bottom: 20px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; }
.card .label { color: var(--muted); font-size: 13px; }
.card .value { font-size: 26px; font-weight: 700; margin-top: 2px; font-variant-numeric: tabular-nums; }
.card.attention .value { color: var(--danger); }
.card.link { cursor: pointer; }
.panels { display: grid; grid-template-columns: repeat(auto-fit, minmax(420px, 1fr)); gap: 16px; }
.panel h2 { font-size: 15px; margin: 0 0 8px; }

/* Dialog */
dialog {
  border: 1px solid var(--border); border-radius: 12px; padding: 0; width: min(820px, 96vw);
  background: var(--panel); color: var(--text); box-shadow: var(--shadow);
}
dialog::backdrop { background: rgba(10, 15, 25, 0.45); }
.dialog-head, .dialog-foot { display: flex; align-items: center; gap: 10px; padding: 14px 20px; }
.dialog-head { border-bottom: 1px solid var(--border); }
.dialog-head h2 { margin: 0; font-size: 17px; flex: 1; }
.dialog-foot { border-top: 1px solid var(--border); }
.spacer { flex: 1; }
.dialog-body { padding: 16px 20px; max-height: 68vh; overflow-y: auto; }
fieldset { border: 0; margin: 0 0 14px; padding: 0; }
legend { font-weight: 600; margin-bottom: 8px; padding: 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px 14px; }
.field { display: flex; flex-direction: column; gap: 4px; }
.field.wide { grid-column: 1 / -1; }
.field label { font-size: 12px; color: var(--muted); font-weight: 600; }
.field .req { color: var(--danger); }
.field input, .field select, .field textarea {
  padding: 7px 9px; border: 1px solid var(--border); border-radius: 6px;
  background: var(--bg); color: var(--text); font: inherit; width: 100%;
}
.field textarea { min-height: 64px; resize: vertical; }
.field.check { flex-direction: row; align-items: center; gap: 8px; padding-top: 18px; }
.field.check input { width: auto; }
.field .help { font-size: 12px; color: var(--muted); }
.sticky {
  position: sticky; bottom: -16px; margin: 0 -20px -16px; padding: 10px 20px 16px;
  background: var(--panel); border-top: 1px solid var(--border);
}
.sticky-title { font-weight: 600; margin-bottom: 8px; }
.computed { display: grid; grid-template-columns: repeat(auto-fill, minmax(135px, 1fr)); gap: 8px; }
.computed div { background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; }
.computed span { display: block; font-size: 12px; color: var(--muted); }
.computed strong { font-size: 16px; font-variant-numeric: tabular-nums; }
.notice { margin: 0; padding: 8px 10px; border-radius: 6px; background: var(--info-bg); color: var(--info-text); }
.start { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 14px 18px; margin-bottom: 16px; }
.start ol { margin: 0; padding-left: 20px; line-height: 1.9; }
.start a { color: var(--accent); }
.error { margin: 12px 20px 0; padding: 10px 12px; border-radius: 8px; background: var(--bad-bg); color: var(--bad-text); }
.error button { margin-left: 8px; }

#toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 8px;
  box-shadow: var(--shadow); opacity: 0; pointer-events: none; transition: opacity .2s; max-width: 90vw;
}
#toast.show { opacity: 1; }
#toast.warn { background: var(--warn-bg); color: var(--warn-text); }

@media (max-width: 640px) {
  main { padding: 12px; }
  .topbar, .tabs { padding-left: 12px; padding-right: 12px; }
  .toolbar input[type=search] { width: 100%; }
  .panels { grid-template-columns: 1fr; }
}