:root {
  --app-bg: #f6f7f9;
  --app-surface: #ffffff;
  --app-text: #111827;
  --app-muted: #667085;
  --app-border: #d9dee7;
  --app-border-soft: #e8ebf0;
  --app-accent: #1f2937;
  --app-radius: 8px;
  --app-radius-sm: 5px;
  --app-shadow: 0 1px 2px rgba(16, 24, 40, 0.04);
}

html { scroll-behavior: smooth; }
body {
  background: var(--app-bg);
  color: var(--app-text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 15px;
}

a { color: #1f2937; }
a:hover { color: #000; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 10px;
  z-index: 1080;
  background: #fff;
  border: 1px solid var(--app-border);
  padding: .5rem .75rem;
}
.skip-link:focus { left: 10px; }

.app-navbar {
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--app-border-soft);
  backdrop-filter: blur(8px);
}
.navbar-brand { letter-spacing: -.02em; }
.brand-mark {
  display: inline-flex;
  width: 28px;
  height: 28px;
  align-items: center;
  justify-content: center;
  margin-right: .55rem;
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-sm);
  font-size: .72rem;
  background: #fff;
}

.hero-section { background: #fff; }
.display-title {
  max-width: 760px;
  font-size: clamp(2rem, 4vw, 3.6rem);
  line-height: 1.02;
  letter-spacing: -.055em;
  font-weight: 750;
}
.page-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  line-height: 1.08;
  letter-spacing: -.04em;
  font-weight: 740;
}
.lead { font-size: 1.05rem; line-height: 1.65; }
.eyebrow {
  color: var(--app-muted);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .72rem;
  font-weight: 700;
}

.surface-card {
  background: var(--app-surface);
  border: 1px solid var(--app-border-soft);
  border-radius: var(--app-radius);
  box-shadow: var(--app-shadow);
}
.section-heading h2 {
  font-size: 1.2rem;
  letter-spacing: -.02em;
  margin: .2rem 0 .25rem;
}
.section-heading p { color: var(--app-muted); margin-bottom: 0; }

.btn, .form-control, .form-select, .alert, .badge, .list-group-item {
  border-radius: var(--app-radius-sm);
}
.btn-lg { padding: .7rem 1rem; font-size: .98rem; }
.btn-dark { background: #111827; border-color: #111827; }
.btn-dark:hover, .btn-dark:focus { background: #000; border-color: #000; }
.form-label { font-weight: 650; font-size: .86rem; margin-bottom: .35rem; }
.form-control, .form-select {
  border-color: var(--app-border);
  padding: .62rem .72rem;
}
.form-control:focus, .form-select:focus {
  border-color: #475467;
  box-shadow: 0 0 0 .2rem rgba(17, 24, 39, .12);
}

.metric {
  border: 1px solid var(--app-border-soft);
  border-radius: var(--app-radius-sm);
  padding: .85rem;
  background: #fbfcfd;
}
.metric span {
  display: block;
  font-size: 1.45rem;
  line-height: 1;
  font-weight: 750;
  letter-spacing: -.04em;
}
.metric small { color: var(--app-muted); }

.fleet-card, .approval-card, .mini-schedule {
  border: 1px solid var(--app-border-soft);
  border-radius: var(--app-radius-sm);
  background: #fff;
}
.fleet-card {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: .85rem;
}
.approval-card { padding: 1rem; }
.admin-action { min-width: min(100%, 300px); }
.admin-stats {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
}
.admin-stats span {
  border: 1px solid var(--app-border-soft);
  border-radius: var(--app-radius-sm);
  background: #fff;
  padding: .5rem .7rem;
  color: var(--app-muted);
}
.admin-stats strong { color: var(--app-text); }

.app-table { --bs-table-bg: transparent; margin-bottom: 0; }
.app-table th {
  color: var(--app-muted);
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  border-bottom-color: var(--app-border);
}
.app-table td { border-color: var(--app-border-soft); }
.compact-list .list-group-item { padding: .85rem 0; border-color: var(--app-border-soft); }
.compact-list .list-group-item:first-child { padding-top: 0; }
.compact-list .list-group-item:last-child { padding-bottom: 0; }

.empty-state {
  border: 1px dashed var(--app-border);
  background: #fbfcfd;
  color: var(--app-muted);
  border-radius: var(--app-radius-sm);
  padding: 1rem;
}
.mini-schedule {
  display: grid;
  grid-template-columns: 82px 1fr auto;
  gap: .75rem;
  align-items: center;
  padding: .75rem;
  text-decoration: none;
}
.mini-schedule span { color: var(--app-muted); font-size: .86rem; }
.mini-schedule strong { font-size: .92rem; }

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .75rem;
  margin: 0;
}
.detail-grid div {
  border: 1px solid var(--app-border-soft);
  border-radius: var(--app-radius-sm);
  padding: .85rem;
  background: #fbfcfd;
}
.detail-grid .span-2 { grid-column: 1 / -1; }
.detail-grid dt {
  color: var(--app-muted);
  font-size: .76rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: .25rem;
}
.detail-grid dd { margin: 0; font-weight: 650; }
.rule-list { padding-left: 1.15rem; }
.rule-list li { margin-bottom: .45rem; }
.app-alert { border-color: var(--app-border-soft); }
.app-footer { background: #fff; padding: 1rem 0; margin-top: 2rem; }

@media (max-width: 767.98px) {
  .fleet-card { flex-direction: column; }
  .mini-schedule { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
  .admin-action { min-width: 100%; }
}