:root {
  --bg: #f7f7f5;
  --card: #ffffff;
  --text: #1f2328;
  --muted: #6b7280;
  --border: #e2e2e0;
  --accent: #3a6ea5;
  --accent-dark: #2c557f;
  --danger: #b3423e;
  --warn: #a5722f;
  --ok: #2f7d4f;
  --radius: 8px;
}

* { 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);
  line-height: 1.5;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}

.topnav-brand { font-weight: 600; }

.topnav-links a {
  margin-left: 16px;
  text-decoration: none;
  color: var(--accent-dark);
  font-size: 0.95rem;
}

.topnav-links a:hover { text-decoration: underline; }

main, .page {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
}

@media (min-width: 1024px) {
  main, .page { max-width: 1200px; padding: 28px 32px; }
  main.wide-page, .page.wide-page { max-width: 1500px; }
  h1 { font-size: 1.7rem; }
  h2 { font-size: 1.25rem; }
  table { font-size: 1rem; }
  th, td { padding: 10px 14px; }
}

@media (min-width: 1440px) {
  main, .page { max-width: 1360px; }
  main.wide-page, .page.wide-page { max-width: 1700px; }
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}

h1 { font-size: 1.4rem; margin: 0 0 16px; }
h2 { font-size: 1.1rem; margin: 0 0 12px; }

label { display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 4px; }

input, select, button, textarea {
  font-family: inherit;
  font-size: 1rem;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
}

input, select, textarea { width: 100%; margin-bottom: 12px; }

button {
  background: var(--accent);
  color: white;
  border: none;
  cursor: pointer;
  font-weight: 500;
}

button:hover { background: var(--accent-dark); }

button.secondary { background: var(--muted); }
button.danger { background: var(--danger); }
button:disabled { background: #c3c3c3; cursor: not-allowed; }

table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; }

.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 140px; }

.locked { color: var(--muted); background: #fafafa; }
.variance-pos { color: var(--ok); font-weight: 600; }
.variance-neg { color: var(--danger); font-weight: 600; }
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge.warn { background: #fbe9d0; color: var(--warn); }
.badge.ok { background: #dcf0e3; color: var(--ok); }

.error-msg { color: var(--danger); font-size: 0.9rem; margin: 8px 0; }
.success-msg { color: var(--ok); font-size: 0.9rem; margin: 8px 0; }
.muted { color: var(--muted); font-size: 0.85rem; }

.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-card { width: 100%; max-width: 360px; }

.week-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 8px; }
.week-grid .day {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px;
  min-height: 70px;
  background: #fff;
  cursor: pointer;
  font-size: 0.85rem;
}
.week-grid .day:hover { border-color: var(--accent); }
.week-grid .day-label { font-weight: 600; margin-bottom: 4px; }

.view-toggle { display: inline-flex; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; width: auto; }
.view-toggle button { border-radius: 0; background: #fff; color: var(--text); font-weight: 500; }
.view-toggle button.active { background: var(--accent); color: #fff; }
.view-toggle button:hover { background: var(--accent-dark); color: #fff; }

.month-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
.month-grid .month-day {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px;
  min-height: 60px;
  background: #fff;
  cursor: pointer;
  font-size: 0.78rem;
}
.month-grid .month-day:hover { border-color: var(--accent); }
.month-grid .month-day.outside { background: #fafafa; color: var(--muted); }
.month-grid .month-day.today { border-color: var(--accent); border-width: 2px; }
.month-grid .day-num { font-weight: 600; margin-bottom: 2px; }
.month-grid .day-summary { color: var(--accent-dark); font-size: 0.72rem; line-height: 1.3; }
.month-weekday-header {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  margin-bottom: 4px;
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  text-align: center;
}

@media (min-width: 1024px) {
  .month-grid .month-day { min-height: 90px; padding: 10px; font-size: 0.85rem; }
  .month-grid .day-summary { font-size: 0.78rem; }
}

@media (max-width: 700px) {
  .week-grid { grid-template-columns: repeat(2, 1fr); }
  .topnav-links a { margin-left: 10px; font-size: 0.85rem; }
  .month-grid .month-day { min-height: 46px; padding: 4px; font-size: 0.68rem; }
}