* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #3B82F6;
  --primary-hover: #2563EB;
  --bg: #F8FAFC;
  --card-bg: #FFFFFF;
  --text: #1E293B;
  --text-secondary: #64748B;
  --border: #E2E8F0;
  --danger: #EF4444;
  --danger-hover: #DC2626;
  --success: #10B981;
  --warning: #F59E0B;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-lg: 0 4px 12px rgba(0,0,0,0.15);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.hidden { display: none !important; }

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

#auth-page { background: linear-gradient(135deg, #3B82F6 0%, #1D4ED8 100%); }

.auth-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 40px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
}

.auth-title {
  text-align: center;
  color: var(--primary);
  margin-bottom: 12px;
  font-size: 28px;
}

.app-desc {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-size: 14px;
}

.feature-list {
  background: #F1F5F9;
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 24px;
}

.feature-item {
  color: var(--text);
  font-size: 14px;
  padding: 6px 0;
}

.auth-tabs {
  display: flex;
  margin-bottom: 24px;
  border-bottom: 2px solid var(--border);
}

.auth-tab {
  flex: 1;
  padding: 12px;
  background: none;
  border: none;
  font-size: 16px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.auth-tab.active {
  color: var(--primary);
  border-bottom: 2px solid var(--primary);
  margin-bottom: -2px;
}

.auth-form .btn { width: 100%; margin-top: 16px; }

.form-group { margin-bottom: 16px; }

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  color: var(--text);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
}

.form-row {
  display: flex;
  gap: 16px;
}

.form-row .form-group { flex: 1; }

.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover { background: var(--primary-hover); }

.btn-secondary {
  background: var(--border);
  color: var(--text);
}

.btn-secondary:hover { background: #CBD5E1; }

.btn-danger {
  background: var(--danger);
  color: white;
}

.btn-danger:hover { background: var(--danger-hover); }

.error {
  color: var(--danger);
  text-align: center;
  margin-top: 12px;
  font-size: 14px;
}

#task-page {
  flex-direction: column;
  align-items: stretch;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  background: var(--card-bg);
  box-shadow: var(--shadow);
}

.header h1 { color: var(--primary); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

#user-display { color: var(--text-secondary); }

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background: var(--card-bg);
  margin: 20px;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.filter-group {
  display: flex;
  gap: 8px;
}

.filter-btn {
  padding: 8px 16px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  color: var(--text-secondary);
}

.filter-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.sort-group select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--card-bg);
  cursor: pointer;
}

.task-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 0 20px 80px;
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
}

.task-card {
  background: var(--card-bg);
  border-radius: 8px;
  padding: 16px 20px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: all 0.2s;
}

.task-card:hover {
  box-shadow: var(--shadow-lg);
}

.task-card.completed .task-title {
  text-decoration: line-through;
  color: var(--text-secondary);
}

.task-checkbox {
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: var(--primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.task-content { flex: 1; }

.task-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.task-title {
  font-size: 16px;
  font-weight: 500;
}

.priority-badge {
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
}

.priority-high { background: #FEE2E2; color: var(--danger); }
.priority-medium { background: #FEF3C7; color: var(--warning); }
.priority-low { background: #D1FAE5; color: var(--success); }

.task-desc {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 8px;
}

.task-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-secondary);
}

.task-due.overdue { color: var(--danger); font-weight: 500; }

.task-actions {
  display: flex;
  gap: 8px;
}

.task-actions button {
  padding: 6px 12px;
  font-size: 13px;
}

.fab {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  font-size: 28px;
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: all 0.2s;
}

.fab:hover {
  background: var(--primary-hover);
  transform: scale(1.1);
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-content {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 24px;
  width: 90%;
  max-width: 500px;
  box-shadow: var(--shadow-lg);
}

.modal-content h2 { margin-bottom: 20px; }

.modal-small { max-width: 360px; }

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.empty-state h3 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--text);
}

.site-records {
  position: fixed;
  left: 18px;
  bottom: 14px;
  z-index: 100;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  max-width: min(calc(100vw - 36px), 560px);
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.84);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.12);
  backdrop-filter: blur(12px);
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-secondary);
}

.site-record-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

.site-record-link:hover {
  color: var(--primary);
}

.site-record-link img {
  display: block;
  flex-shrink: 0;
}

@media (max-width: 600px) {
  .header { flex-direction: column; gap: 12px; }
  .toolbar { flex-direction: column; gap: 12px; }
  .filter-group { width: 100%; justify-content: center; }
  .form-row { flex-direction: column; gap: 0; }

  .site-records {
    left: 12px;
    right: 12px;
    bottom: 12px;
    max-width: none;
    padding: 8px 10px;
    gap: 6px 14px;
    font-size: 11px;
  }
}