:root {
  --bg-primary: #FAFAF8;
  --bg-secondary: #FFFFFF;
  --bg-tertiary: #F2F0EB;
  --text-primary: #1A1A18;
  --text-secondary: #5A5A56;
  --text-tertiary: #8A8A84;
  --border: #E2E0DA;
  --accent: #C9A227;
  --accent-hover: #B08E1F;
  --accent-text: #1A1A18;
  --success: #1D9E75;
  --danger: #E24B4A;
  --info: #378ADD;
}

html.dark {
  --bg-primary: #1A1A18;
  --bg-secondary: #2A2A26;
  --bg-tertiary: #333330;
  --text-primary: #E8E6E0;
  --text-secondary: #A8A8A2;
  --text-tertiary: #6A6A64;
  --border: #3D3D38;
  --accent: #C9A227;
  --accent-hover: #D4AD32;
  --accent-text: #1A1A18;
  --success: #5DCAA5;
  --danger: #F09595;
  --info: #85B7EB;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-weight: 500;
  color: var(--text-primary);
  margin: 0 0 0.75rem;
  line-height: 1.25;
}
h1 { font-size: 1.75rem; }
h2 { font-size: 1.375rem; }
h3 { font-size: 1.125rem; }

p { color: var(--text-secondary); margin: 0 0 1rem; }

a { color: var(--info); text-decoration: none; }
a:hover { text-decoration: underline; }

.label, .small-label {
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-tertiary);
}

/* ---------- Layout ---------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 240px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  transition: width 0.2s;
}
.sidebar.collapsed { width: 60px; }
.sidebar.collapsed .sidebar-label,
.sidebar.collapsed .brand-text,
.sidebar.collapsed .user-text { display: none; }
.sidebar.collapsed .sidebar-actions {
  flex-direction: column;
  align-items: stretch;
  gap: 0.3rem;
}
.sidebar.collapsed .sidebar-actions form { flex: none; }

.sidebar-header {
  padding: 1.25rem 1rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.brand-dot {
  width: 28px; height: 28px;
  background: var(--accent);
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-text);
  font-weight: 600;
  flex-shrink: 0;
}
.brand-text { font-weight: 500; font-size: 1rem; }

.nav-group {
  padding: 0.75rem 0.5rem;
  flex: 1;
  overflow-y: auto;
}
.nav-group-title {
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  padding: 0.5rem 0.75rem 0.25rem;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.55rem 0.75rem;
  color: var(--text-secondary);
  border-radius: 8px;
  border-left: 3px solid transparent;
  margin-bottom: 2px;
  text-decoration: none;
  font-size: 0.95rem;
}
.nav-link:hover { background: var(--bg-tertiary); color: var(--text-primary); text-decoration: none; }
.nav-link.active {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-left-color: var(--accent);
}
.nav-link.disabled { color: var(--text-tertiary); cursor: not-allowed; pointer-events: none; opacity: 0.7; }
.nav-icon { width: 18px; flex-shrink: 0; text-align: center; }

.sidebar-footer {
  border-top: 1px solid var(--border);
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.user-meta { font-size: 0.8rem; }
.user-meta strong { color: var(--text-primary); font-weight: 500; }
.user-meta div { color: var(--text-tertiary); }

.sidebar-actions { display: flex; gap: 0.4rem; align-items: center; }
.icon-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  padding: 0.35rem 0.5rem;
  cursor: pointer;
  font-size: 0.85rem;
}
.icon-btn:hover { color: var(--text-primary); border-color: var(--text-tertiary); }

.content {
  flex: 1;
  padding: 2rem 2rem 5rem;
  max-width: 960px;
  margin: 0 auto;
  width: 100%;
}

/* ---------- Cards ---------- */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}
.card h2, .card h3 { margin-top: 0; }

.grid { display: grid; gap: 1rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 768px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-text);
  border: none;
  border-radius: 8px;
  padding: 0.5rem 1.25rem;
  font-weight: 500;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  font-family: inherit;
}
.btn:hover { background: var(--accent-hover); text-decoration: none; }

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg-tertiary); }

.btn-danger {
  background: var(--danger);
  color: white;
}
.btn-danger:hover { background: var(--danger); filter: brightness(0.9); }

.btn-sm { padding: 0.35rem 0.75rem; font-size: 0.85rem; }

/* ---------- Forms ---------- */
label { display: block; margin-bottom: 0.25rem; font-size: 0.85rem; color: var(--text-secondary); }
input[type="text"],
input[type="email"],
input[type="password"],
input[type="date"],
input[type="number"],
input[type="tel"],
select,
textarea {
  width: 100%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form-row { margin-bottom: 1rem; }
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
@media (max-width: 640px) {
  .form-grid { grid-template-columns: 1fr; }
}

/* ---------- Tables ---------- */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
table th {
  text-align: left;
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  font-weight: 500;
  padding: 0.75rem 0.75rem;
  border-bottom: 1px solid var(--border);
}
table td {
  padding: 0.75rem;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
}
table tr:nth-child(even) td { background: var(--bg-tertiary); }
table tr:last-child td { border-bottom: none; }

/* ---------- Badges ---------- */
.badge {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  font-size: 0.72rem;
  font-weight: 500;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.badge-pending { background: rgba(201, 162, 39, 0.18); color: var(--accent); }
.badge-approved { background: rgba(29, 158, 117, 0.18); color: var(--success); }
.badge-denied { background: rgba(226, 75, 74, 0.18); color: var(--danger); }
.badge-cancelled { background: var(--bg-tertiary); color: var(--text-tertiary); }

/* ---------- Tabs ---------- */
.tab-bar {
  display: flex;
  gap: 1.25rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}
.tab {
  padding: 0.75rem 0;
  color: var(--text-tertiary);
  border-bottom: 2px solid transparent;
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
}
.tab.active { color: var(--text-primary); border-bottom-color: var(--accent); }
.tab:hover { color: var(--text-primary); text-decoration: none; }

/* ---------- Progress bar ---------- */
.progress {
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 999px;
  overflow: hidden;
  margin-top: 0.5rem;
}
.progress-bar { height: 100%; background: var(--accent); transition: width 0.3s; }

/* ---------- Toggle switch ---------- */
.switch { position: relative; display: inline-block; width: 40px; height: 22px; }
.switch input { display: none; }
.switch-slider {
  position: absolute; inset: 0;
  background: var(--border);
  border-radius: 999px;
  transition: 0.2s;
}
.switch-slider::before {
  content: "";
  position: absolute;
  width: 16px; height: 16px;
  left: 3px; top: 3px;
  background: white;
  border-radius: 50%;
  transition: 0.2s;
}
.switch input:checked + .switch-slider { background: var(--accent); }
.switch input:checked + .switch-slider::before { transform: translateX(18px); }

/* ---------- Alerts ---------- */
.alert {
  padding: 0.85rem 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.92rem;
}
.alert-danger { background: rgba(226, 75, 74, 0.12); color: var(--danger); border: 1px solid rgba(226, 75, 74, 0.3); }
.alert-success { background: rgba(29, 158, 117, 0.12); color: var(--success); border: 1px solid rgba(29, 158, 117, 0.3); }

/* ---------- Page header ---------- */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.page-header h1 { margin-bottom: 0.25rem; }
.page-header .muted { color: var(--text-secondary); font-size: 0.92rem; }

/* ---------- Login page ---------- */
.login-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}
.login-card {
  width: 100%;
  max-width: 400px;
  padding: 2rem;
}
.login-brand { text-align: center; margin-bottom: 1.5rem; }
.login-brand .brand-dot { margin: 0 auto 0.75rem; width: 42px; height: 42px; font-size: 1.15rem; }

/* ---------- Calendar ---------- */
.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}
.cal-weekday {
  text-align: center;
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--text-tertiary);
  padding: 0.5rem 0;
  letter-spacing: 0.05em;
}
.cal-day {
  min-height: 92px;
  background: var(--bg-tertiary);
  border-radius: 8px;
  padding: 0.4rem;
  font-size: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.cal-day.empty { background: transparent; }
.cal-day-number { font-weight: 500; color: var(--text-secondary); font-size: 0.75rem; }
.cal-entry {
  background: var(--bg-secondary);
  border-left: 3px solid var(--accent);
  padding: 2px 5px;
  border-radius: 4px;
  font-size: 0.72rem;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.cal-entry.policy-sick { border-left-color: var(--info); }
.cal-entry.policy-personal { border-left-color: var(--success); }
.cal-entry.policy-bereavement { border-left-color: var(--danger); }

/* ---------- Mobile bottom nav ---------- */
.mobile-nav { display: none; }

@media (max-width: 768px) {
  .app-shell { flex-direction: column; }
  .sidebar { display: none; }
  .content { padding: 1.25rem 1rem 5rem; }
  .mobile-nav {
    display: flex;
    position: fixed;
    bottom: 0; left: 0; right: 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    justify-content: space-around;
    padding: 0.5rem 0.25rem calc(0.5rem + env(safe-area-inset-bottom));
    z-index: 100;
  }
  .mobile-nav .nav-link {
    flex-direction: column;
    gap: 2px;
    font-size: 0.68rem;
    padding: 0.35rem 0.5rem;
    border-left: none;
    flex: 1;
    text-align: center;
    color: var(--text-tertiary);
  }
  .mobile-nav .nav-link.active {
    background: transparent;
    color: var(--accent);
    border-left: none;
  }
  .mobile-nav .nav-link .nav-icon { font-size: 1.1rem; }
}

/* ---------- Radio / checkbox groups ---------- */
.radio-group, .checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.25rem;
}
.radio-label, .checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 0.92rem;
}
.checkbox-group { flex-direction: column; gap: 0.5rem; }
.checkbox-group .checkbox-label { flex-direction: row; }

/* ---------- Utility ---------- */
.muted { color: var(--text-secondary); }
.text-center { text-align: center; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
.gap-sm { gap: 0.5rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.hidden { display: none; }
details summary { outline: none; }
details[open] summary { margin-bottom: 0.5rem; }