:root {
  --bg: #f4f6f8;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-dark: #1e4fc4;
  --border: #e2e6ea;
  --danger: #dc2626;
  --danger-bg: #fdecec;
  --success: #16a34a;
  --locked-bg: #f3f4f6;
  --paid-bg: #f0fdf4;
  --paid-border: #86efac;
  --paid-color: #15803d;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 14px;
  background: var(--accent);
  color: #fff;
  transition: background .15s;
}
button:hover { background: var(--accent-dark); }
button.secondary { background: #e5e7eb; color: var(--text); }
button.secondary:hover { background: #d1d5db; }
button.danger { background: var(--danger); }
button.danger:hover { background: #b91c1c; }
button:disabled { opacity: .5; cursor: not-allowed; }

input[type=text], input[type=password], input[type=time], input[type=date], input[type=number] {
  font-family: inherit;
  font-size: 14px;
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: #fff;
  color: var(--text);
}
input:disabled { background: var(--locked-bg); color: var(--muted); }

.center-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.auth-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: 0 4px 20px rgba(0,0,0,.08);
  padding: 32px;
  width: 100%;
  max-width: 360px;
}
.auth-card h1 {
  font-size: 20px;
  margin: 0 0 4px;
  text-align: center;
}
.auth-card p.sub {
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  margin: 0 0 20px;
}
.auth-card label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin: 12px 0 4px;
}
.auth-card input { width: 100%; }
.auth-card .actions { margin-top: 20px; }
.auth-card button[type=submit] { width: 100%; }

.error-msg {
  background: var(--danger-bg);
  color: var(--danger);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 13px;
  margin-top: 12px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--card);
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 8px;
}
.brand { font-weight: 700; font-size: 17px; }
.user-info { display: flex; align-items: center; gap: 10px; font-size: 14px; }
.user-info .name { color: var(--muted); }

.employee-switch {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.emp-btn { background: #e5e7eb; color: var(--text); }
.emp-btn.active { background: var(--accent); color: #fff; }
.rate-editor { margin-left: auto; display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); }
.rate-editor input { width: 80px; }

.tabs {
  display: flex;
  gap: 4px;
  padding: 10px 20px 0;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}
.tab-btn {
  background: transparent;
  color: var(--muted);
  border-radius: 8px 8px 0 0;
  padding: 10px 16px;
  font-weight: 600;
}
.tab-btn.active { background: var(--bg); color: var(--accent); }

main#content {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 18px;
  box-shadow: 0 1px 3px rgba(0,0,0,.04);
}
.card h2 { font-size: 16px; margin: 0 0 14px; }
.card h3 { font-size: 14px; margin: 0 0 10px; color: var(--muted); }

.week-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 16px;
}
.week-nav .week-label { font-weight: 600; min-width: 260px; text-align: center; }

.day-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}
.day-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.day-card.locked { background: var(--paid-bg); border-color: var(--paid-border); }
.day-card.today { border-color: var(--accent); }
.day-card.absent { background: #fef2f2; border-color: #fecaca; }
.day-header { display: flex; justify-content: space-between; font-size: 13px; }
.day-header .day-name { font-weight: 700; }
.day-header .day-date { color: var(--muted); }
.absent-toggle { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--danger); cursor: pointer; }
.absent-toggle input { width: auto; cursor: pointer; }
.day-fields label { display: block; font-size: 11px; color: var(--muted); margin-bottom: 6px; }
.day-fields input { width: 100%; }
.day-hours { font-size: 13px; font-weight: 600; color: var(--accent); }
.badge-absent { font-size: 11px; font-weight: 600; color: var(--danger); }
.stamp-paid {
  display: inline-block;
  align-self: flex-start;
  border: 2px solid var(--paid-color);
  color: var(--paid-color);
  background: rgba(255,255,255,.5);
  padding: 2px 10px;
  border-radius: 4px;
  font-weight: 800;
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  transform: rotate(-6deg);
}
.day-meta { font-size: 10.5px; color: var(--muted); line-height: 1.4; min-height: 26px; }
.week-total { text-align: right; font-size: 13px; color: var(--muted); margin-top: 10px; }

table.data-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.data-table th, table.data-table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
table.data-table th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }
table.data-table tr.locked-row { background: var(--paid-bg); }
.meta-cell { font-size: 11px; color: var(--muted); }
.actions-cell { display: flex; gap: 6px; }
.actions-cell button { padding: 5px 10px; font-size: 12px; }

.expense-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: flex-end;
  margin-bottom: 16px;
}
.expense-form label { display: flex; flex-direction: column; font-size: 12px; color: var(--muted); gap: 4px; }
.expense-form input[type=text] { min-width: 220px; }

.range-picker { display: flex; gap: 10px; align-items: flex-end; margin-bottom: 16px; flex-wrap: wrap; }
.range-picker label { display: flex; flex-direction: column; font-size: 12px; color: var(--muted); gap: 4px; }

.totals-row { display: flex; gap: 24px; flex-wrap: wrap; margin-top: 12px; }
.totals-row .total-item { text-align: left; }
.totals-row .total-item .label { font-size: 12px; color: var(--muted); }
.totals-row .total-item .value { font-size: 20px; font-weight: 700; }
.totals-row .total-item.grand .value { color: var(--accent); }

.confirm-box {
  margin-top: 14px;
  padding: 12px;
  background: #fff7ed;
  border: 1px solid #fed7aa;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
}

.badge-status {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 999px;
  background: #dcfce7;
  color: #15803d;
}
.badge-status.reverted { background: #fee2e2; color: #b91c1c; }

.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #111827;
  color: #fff;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 13.5px;
  box-shadow: 0 4px 14px rgba(0,0,0,.2);
  z-index: 50;
}
.toast.error { background: var(--danger); }

.empty-state { color: var(--muted); font-size: 13.5px; padding: 10px 0; }

@media (max-width: 600px) {
  main#content { padding: 12px; }
  .card { padding: 14px; }
}