:root {
  --bg: #f5f7fa;
  --card: #ffffff;
  --border: #e1e5eb;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --danger: #dc2626;
  --today-bg: #fef3c7;
  --weekend-bg: #e5e7eb;
  --absence-bg: #dbeafe;
  --absence-text: #1e3a8a;
  --holiday-bg: #fee2e2;
  --holiday-text: #991b1b;
}

* { box-sizing: border-box; }

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

header {
  background: var(--primary);
  color: white;
  padding: 1rem 2rem;
}

header h1 { margin: 0; font-size: 1.4rem; }

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem;
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  main {
    grid-template-columns: 220px 1fr;
    grid-template-areas:
      "data data"
      "form calendar"
      "list list";
  }
  .data-source-card { grid-area: data; }
  .form-card { grid-area: form; }
  .calendar-card { grid-area: calendar; }
  .list-card { grid-area: list; }
}

.data-source-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
}

.data-source-card.status-local { background: #fffbeb; border-color: #fde68a; }
.data-source-card.status-prompt { background: #fff7ed; border-color: #fdba74; }
.data-source-card.status-connected { background: #f0fdf4; border-color: #bbf7d0; }
.data-source-card.status-error { background: #fef2f2; border-color: #fca5a5; }
.data-source-card.status-unsupported { background: #f3f4f6; border-color: #d1d5db; }

.data-status { display: flex; flex-direction: column; gap: 0.15rem; flex: 1; min-width: 240px; }
.data-status #data-status-text { font-weight: 600; font-size: 0.9rem; }
.data-status-detail { font-size: 0.8rem; color: var(--muted); }

.data-source-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.data-source-actions button { font-size: 0.85rem; padding: 0.4rem 0.75rem; }

section {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
}

h2 { margin-top: 0; font-size: 1.1rem; }

.user-identity {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  padding: 0.5rem 0.75rem;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: 6px;
  font-size: 0.85rem;
  color: #166534;
}

.user-setup {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
  padding: 0.75rem;
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: 6px;
}

.user-setup label {
  color: #92400e;
  font-weight: 600;
}

.link-btn {
  background: none;
  color: var(--primary);
  padding: 0;
  font-size: 0.8rem;
  text-decoration: underline;
  margin-left: auto;
}

.link-btn:hover { background: none; color: var(--primary-hover); }

form { display: flex; flex-direction: column; gap: 0.75rem; }

label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.85rem;
  color: var(--muted);
}

input {
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 1rem;
  font-family: inherit;
}

input:focus { outline: 2px solid var(--primary); outline-offset: -1px; }

button {
  padding: 0.55rem 1rem;
  border: none;
  border-radius: 4px;
  background: var(--primary);
  color: white;
  font-size: 0.95rem;
  cursor: pointer;
}

button:hover { background: var(--primary-hover); }

.calendar-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.calendar-header h2 {
  margin: 0;
  flex: 1;
  text-align: center;
  text-transform: capitalize;
}

.calendar-header button { padding: 0.4rem 0.8rem; }

.calendar {
  border: 1px solid var(--border);
  border-radius: 4px;
}

.absence-table {
  border-collapse: collapse;
  font-size: 0.8rem;
  width: 100%;
  table-layout: fixed;
}

.absence-table th,
.absence-table td {
  border: 1px solid #9ca3af;
  text-align: center;
  padding: 0;
}

.absence-table thead th {
  background: #f3f4f6;
  color: var(--muted);
  font-weight: 600;
  height: 26px;
  min-width: 24px;
}

.absence-table th.day-col,
.absence-table td.day-cell {
  width: auto;
}

.absence-table th.day-letter {
  font-size: 0.7rem;
  text-transform: uppercase;
}

.absence-table th.person-col,
.absence-table td.person-col {
  position: sticky;
  left: 0;
  background: #f3f4f6;
  text-align: left;
  padding: 0.4rem 0.5rem;
  width: 110px;
  min-width: 110px;
  max-width: 110px;
  font-weight: 600;
  z-index: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.absence-table tbody td.person-col {
  background: var(--card);
  font-weight: 500;
}

.absence-table td.day-cell {
  height: 32px;
  background: var(--card);
}

.absence-table .weekend { background: var(--weekend-bg); }
.absence-table td.day-cell.weekend { background: var(--weekend-bg); }
.absence-table .holiday { background: var(--holiday-bg); color: var(--holiday-text); }
.absence-table td.day-cell.holiday { background: var(--holiday-bg); }
.absence-table thead th.holiday { color: var(--holiday-text); }
.absence-table .today { background: var(--today-bg); }
.absence-table td.day-cell.today { background: var(--today-bg); }

.absence-table td.absent {
  background: var(--person-bg, var(--absence-bg));
  position: relative;
}

.absence-table td.absent::after {
  content: "";
  position: absolute;
  inset: 4px;
  background: var(--person-fill, var(--primary));
  border-radius: 3px;
}

.person-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 0.5rem;
  vertical-align: middle;
  flex-shrink: 0;
}

.list-card li { gap: 0.5rem; }
.absence-label { flex: 1; }

.absence-table td.empty-row {
  padding: 1rem;
  color: var(--muted);
  font-style: italic;
  text-align: center;
}

.list-card ul { list-style: none; padding: 0; margin: 0; }

.list-card li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
}

.list-card li:last-child { border-bottom: none; }

.list-card .empty {
  color: var(--muted);
  font-style: italic;
  padding: 0.5rem 0;
}

.delete-btn {
  background: transparent;
  color: var(--danger);
  padding: 0.3rem 0.6rem;
  font-size: 0.85rem;
}

.delete-btn:hover { background: #fee2e2; }

.error {
  color: var(--danger);
  font-size: 0.85rem;
  margin: 0.5rem 0 0;
}