:root {
  --color-bg: #f4f6f8;
  --color-card: #ffffff;
  --color-text: #1f2933;
  --color-muted: #6b7280;
  --color-primary: #2563eb;
  --color-home: #16a34a;
  --color-office: #d97706;
  --color-border: #e5e7eb;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
}

.hidden {
  display: none !important;
}

.screen {
  min-height: 100vh;
}

#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-box {
  background: var(--color-card);
  padding: 2.5rem;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  text-align: center;
  min-width: 320px;
}

.login-box h1 {
  font-size: 1.4rem;
  margin-bottom: 0.25rem;
}

.login-box input {
  width: 100%;
  padding: 0.6rem;
  margin: 1rem 0;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 1rem;
}

.login-box button {
  width: 100%;
  padding: 0.6rem;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
}

.error {
  color: #dc2626;
  margin-top: 0.75rem;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border);
}

header h1 {
  font-size: 1.2rem;
  margin: 0;
}

.header-actions {
  display: flex;
  gap: 1rem;
}

.link-button {
  background: none;
  border: none;
  color: var(--color-primary);
  cursor: pointer;
  font-size: 0.95rem;
  padding: 0;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem;
}

#today-date {
  text-align: center;
  color: var(--color-muted);
  font-weight: 500;
  text-transform: capitalize;
}

.people-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

.person-card {
  background: var(--color-card);
  border-radius: 12px;
  padding: 1.25rem;
  text-align: center;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.person-card h3 {
  margin-top: 0;
}

.toggle-button {
  display: block;
  width: 100%;
  padding: 0.75rem;
  margin-top: 0.6rem;
  border-radius: 8px;
  border: 2px solid var(--color-border);
  background: white;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.toggle-button[data-field="homeoffice"].active {
  background: var(--color-home);
  border-color: var(--color-home);
  color: white;
}

.toggle-button[data-field="office"].active {
  background: var(--color-office);
  border-color: var(--color-office);
  color: white;
}

.save-status {
  text-align: center;
  color: var(--color-home);
  font-weight: 500;
  margin-top: 1rem;
}

#advanced-section {
  margin-top: 2.5rem;
}

.month-picker {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.month-picker input {
  padding: 0.4rem;
}

#month-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-card);
  border-radius: 8px;
  overflow: hidden;
}

#month-table th,
#month-table td {
  border: 1px solid var(--color-border);
  padding: 0.4rem 0.5rem;
  text-align: center;
  font-size: 0.9rem;
}

#month-table tbody tr.weekend {
  background: #fafafa;
}

.export-box {
  margin-top: 2rem;
  background: var(--color-card);
  border-radius: 12px;
  padding: 1.25rem;
}

.export-form {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: end;
}

.export-form label {
  display: flex;
  flex-direction: column;
  font-size: 0.85rem;
  color: var(--color-muted);
  gap: 0.3rem;
}

.export-form select,
.export-form input {
  padding: 0.4rem;
  border-radius: 6px;
  border: 1px solid var(--color-border);
}

.export-form button {
  padding: 0.55rem 1.2rem;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.95rem;
}

@media (max-width: 480px) {
  .people-grid {
    grid-template-columns: 1fr;
  }
}