:root {
  color-scheme: light;
  --surface: #fff;
  --surface-soft: #f8fafc;
  --field: #fff;
  --row-line: #edf1f5;
  --theme-shadow: #183d680a;
  --hero-fade: #f3f6faf2;
  --overlay: #041326b8;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --mar: #66b5ff;
  --mar-deep: #edf7ff;
  --mar-mid: #2183d2;
  --mar-cyan: #35c8e8;
  --gold: #ffc928;
  --ink: #e9f1fb;
  --muted: #9db0c5;
  --line: #263c55;
  --bg: #091522;
  --surface: #101f2f;
  --surface-soft: #142638;
  --field: #0c1a28;
  --row-line: #20364d;
  --theme-shadow: #00000035;
  --hero-fade: #091522f2;
  --overlay: #020a12d6;
}

body { transition: background .2s, color .2s; }
body::before {
  background: linear-gradient(90deg, var(--hero-fade), var(--bg) 67%),
    url('/assets/mar-roof-hero.png') center/cover;
}

.notice,
.metrics article,
.panel {
  background: var(--surface);
  border-color: var(--line);
  box-shadow: 0 6px 18px var(--theme-shadow);
}

.row,
.data-row { border-color: var(--row-line); }
.bar { background: var(--line); }
.data-row.head,
.settings > div,
.filters,
.settings-form,
.backup-box { background: var(--surface-soft); }
.filters input,
.filters select,
.settings-form input,
.data-row select,
.login-card input,
.modal input {
  background: var(--field);
  color: var(--ink);
  border-color: var(--line);
}

.chart { background: linear-gradient(var(--surface), var(--surface-soft)); }
.backdrop { background: var(--overlay); }
.modal {
  background: var(--surface);
  border-top-color: var(--mar-mid);
}
.modal code {
  background: var(--surface-soft);
  border-color: var(--line);
}

.theme-toggle {
  position: fixed;
  z-index: 100;
  right: 20px;
  bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 13px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 8px 24px #00152e2e;
}
.theme-toggle:hover { background: var(--surface-soft); }
.theme-toggle span:first-child { font-size: 17px; line-height: 1; }

.login-card {
  background: var(--surface);
  border: 1px solid var(--line);
}
.login-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin: 0 auto 22px;
}
.login-brand img {
  display: block;
  width: 58px;
  height: 58px;
  max-width: none;
  max-height: none;
  margin: 0;
  border-radius: 13px;
}
.login-brand strong,
.login-brand span {
  display: block;
  color: var(--ink);
}
.login-brand strong { font-size: 24px; letter-spacing: 3px; }
.login-brand span { font-size: 9px; font-weight: 800; letter-spacing: 1.4px; }
.login-card p { color: var(--muted); }
.login-card #loginError { color: #e05c68; }

html[data-theme="dark"] nav a.active {
  background: #eaf4ff;
  color: #0c3c78;
}
html[data-theme="dark"] header { border-color: var(--line); }
.employee-sites { margin-top: 18px; }
.employee-sites-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 15px;
  border-left: 4px solid var(--gold);
  border-radius: 8px;
  background: var(--surface-soft);
  color: var(--ink);
}
.employee-sites-title strong,
.employee-sites-title small { display: block; }
.employee-sites-title strong { font-size: 14px; }
.employee-sites-title small { margin-top: 3px; color: var(--muted); font-size: 10px; }
.employee-sites-title > span { color: var(--mar); font-size: 11px; font-weight: 700; }
.activity-controls {
  display: flex;
  align-items: end;
  gap: 10px;
}
.activity-controls label {
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
}
.activity-controls select {
  display: block;
  min-width: 230px;
  height: 38px;
  margin-top: 5px;
  padding: 0 34px 0 11px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--field);
  color: var(--ink);
}
.activity-filter-summary {
  margin: 8px 0 12px;
  padding: 9px 12px;
  border-radius: 7px;
  background: var(--surface-soft);
  color: var(--mar);
  font-size: 11px;
  font-weight: 700;
}
.report-activity-heading { margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--line); }
.report-activity-heading h2 { margin-bottom: 5px; }
.report-activity-heading p { margin: 0 0 12px; color: var(--muted); font-size: 11px; }

@media (max-width: 520px) {
  .theme-toggle { right: 12px; bottom: 12px; }
  .theme-toggle span:last-child { display: none; }
  .activity-controls { width: 100%; align-items: stretch; flex-direction: column; }
  .activity-controls select { width: 100%; min-width: 0; }
}