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

:root {
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --primary-light: #e8f0fe;
  --bg: #f0f2f5;
  --card: #ffffff;
  --text: #1f1f1f;
  --text-secondary: #5f6368;
  --border: #e0e0e0;
  --success: #34a853;
  --warning: #f9ab00;
  --danger: #ea4335;
  --sidebar-bg: #1e293b;
  --sidebar-text: #94a3b8;
  --sidebar-active: #e2e8f0;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.12);
}

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

.app {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 240px;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  padding: 20px 0;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 20px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 16px;
}

.logo-icon {
  font-size: 28px;
  color: var(--primary);
  background: rgba(26,115,232,0.15);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
}

.sidebar-header h1 {
  font-size: 18px;
  color: #fff;
  font-weight: 700;
  line-height: 1.1;
}

.sidebar-header span {
  font-size: 13px;
  color: var(--sidebar-text);
}

.nav-menu {
  list-style: none;
  padding: 0 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
  font-size: 14px;
  margin-bottom: 2px;
}

.nav-item:hover {
  background: rgba(255,255,255,0.06);
  color: #fff;
}

.nav-item.active {
  background: rgba(26,115,232,0.2);
  color: #fff;
}

.nav-item i {
  width: 20px;
  text-align: center;
  font-size: 15px;
}

/* Content */
.content {
  flex: 1;
  padding: 28px 32px;
  overflow-y: auto;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.view-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.view-header h2 {
  font-size: 24px;
  font-weight: 700;
}

/* Cards */
.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.card-header h3 {
  font-size: 16px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-header h3 i {
  color: var(--primary);
}

/* Planning layout */
.planning-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

/* Calendar */
.calendar-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  font-weight: 600;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  margin-bottom: 16px;
}

.cal-header {
  text-align: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 8px 0;
  text-transform: uppercase;
}

.cal-day {
  text-align: center;
  padding: 10px 4px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.12s;
  position: relative;
}

.cal-day:hover {
  background: var(--primary-light);
}

.cal-day.other-month {
  color: #ccc;
}

.cal-day.today {
  font-weight: 700;
  color: var(--primary);
}

.cal-day.today::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  background: var(--primary);
  border-radius: 50%;
}

.cal-day.selected {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
}

.cal-day.selected.today::after {
  background: #fff;
}

.selected-dates {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 12px;
  background: var(--bg);
  border-radius: 8px;
  min-height: 44px;
  align-items: center;
  margin-bottom: 12px;
}

.selected-dates .placeholder {
  color: var(--text-secondary);
  font-size: 13px;
}

.date-chip {
  background: var(--primary-light);
  color: var(--primary);
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.quick-select {
  display: flex;
  gap: 8px;
}

/* Form */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.form-group select,
.form-group input[type="time"],
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.15s;
  background: #fff;
}

.form-group select:focus,
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,115,232,0.12);
}

.employee-checklist {
  max-height: 200px;
  overflow-y: auto;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 8px;
}

.employee-check-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.1s;
}

.employee-check-item:hover {
  background: var(--bg);
}

.employee-check-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
}

.employee-check-item .emp-name {
  font-weight: 500;
  font-size: 14px;
}

.employee-check-item .emp-email {
  font-size: 12px;
  color: var(--text-secondary);
}

.form-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  cursor: pointer;
}

.checkbox-label input {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
}

/* Buttons */
.btn-primary {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background 0.15s;
}

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

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-small {
  background: var(--primary-light);
  color: var(--primary);
  border: none;
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.12s;
}

.btn-small:hover {
  background: var(--primary);
  color: #fff;
}

.btn-icon {
  background: none;
  border: none;
  cursor: pointer;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all 0.12s;
}

.btn-icon:hover {
  background: var(--bg);
  color: var(--text);
}

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

.btn-danger:hover {
  background: #fce8e6;
  color: var(--danger);
}

/* Tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th {
  text-align: left;
  padding: 12px 16px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--text-secondary);
  border-bottom: 2px solid var(--border);
}

.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover td {
  background: var(--bg);
}

.data-table .actions {
  display: flex;
  gap: 4px;
}

.status-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.status-badge.active {
  background: #e6f4ea;
  color: var(--success);
}

.status-badge.completed {
  background: #e8f0fe;
  color: var(--primary);
}

.status-badge.paused {
  background: #fef7e0;
  color: var(--warning);
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-secondary);
  display: none;
}

.empty-state.visible {
  display: block;
}

.empty-state i {
  font-size: 48px;
  margin-bottom: 12px;
  opacity: 0.3;
}

.empty-state p {
  font-size: 14px;
}

/* History */
.history-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.history-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px;
  background: var(--bg);
  border-radius: 8px;
  position: relative;
}

.history-item .hi-icon {
  width: 40px;
  height: 40px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.history-item .hi-content {
  flex: 1;
}

.history-item .hi-title {
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 4px;
}

.history-item .hi-meta {
  font-size: 12px;
  color: var(--text-secondary);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.history-item .hi-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.history-item .hi-delete {
  position: absolute;
  top: 12px;
  right: 12px;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(2px);
}

.modal-overlay.open {
  display: flex;
}

.modal {
  background: var(--card);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  width: 480px;
  max-width: 90vw;
  max-height: 80vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  font-size: 18px;
}

.modal-body {
  padding: 24px;
}

.modal-body .form-group:last-child {
  margin-bottom: 0;
}

.modal-body .modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 20px;
}

.btn-secondary {
  background: var(--bg);
  color: var(--text);
  border: none;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

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

/* Toast */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--sidebar-bg);
  color: #fff;
  padding: 14px 20px;
  border-radius: 8px;
  font-size: 14px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideIn 0.25s ease;
  min-width: 280px;
}

.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--danger); }
.toast.info { border-left: 4px solid var(--primary); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Select all button */
.select-all-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}

.select-all-bar label {
  margin: 0 !important;
  text-transform: none !important;
  font-size: 13px !important;
  cursor: pointer;
}

/* Responsive */
@media (max-width: 960px) {
  .planning-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .sidebar {
    width: 64px;
    padding: 16px 0;
  }
  .sidebar-header div, .nav-item span {
    display: none;
  }
  .sidebar-header {
    justify-content: center;
    padding: 0 0 16px;
  }
  .nav-item {
    justify-content: center;
    padding: 12px;
  }
  .content {
    padding: 20px 16px;
  }
}