/* ===== Login Page ===== */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 50%, #1e293b 100%);
  padding: 20px;
}

.login-container {
  background: var(--white);
  border-radius: 16px;
  padding: 48px 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
  animation: slideUp 0.4s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.login-header {
  text-align: center;
  margin-bottom: 32px;
}

.login-header i {
  font-size: 3rem;
  color: var(--primary);
  margin-bottom: 12px;
  display: block;
}

.login-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 4px;
}

.login-header p {
  color: var(--gray-400);
  font-size: 0.9rem;
}

.login-form .form-group {
  margin-bottom: 20px;
}

.login-form .form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--dark);
}

.input-group {
  position: relative;
}

.input-group i {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-400);
  font-size: 1rem;
}

.input-group .toggle-password {
  position: absolute;
  right: 16px;
  left: auto;
  cursor: pointer;
  color: var(--gray-400);
}

.input-group .toggle-password:hover {
  color: var(--dark);
}

.input-group input {
  width: 100%;
  padding: 14px 48px;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 1rem;
  transition: var(--transition);
}

.input-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.btn-login {
  width: 100%;
  padding: 14px;
  background: var(--primary);
  color: var(--white);
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-login:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

.error-message {
  color: var(--danger);
  text-align: center;
  margin-top: 12px;
  font-size: 0.875rem;
  min-height: 20px;
}

/* ===== CSS Variables ===== */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary: #64748b;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --dark: #1e293b;
  --light: #f8fafc;
  --white: #ffffff;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --radius: 8px;
  --radius-lg: 12px;
  --transition: all 0.2s ease;
}

/* ===== Reset & Base ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background-color: var(--gray-100);
  color: var(--dark);
  line-height: 1.6;
}

/* Admin page background */
body.admin-page {
  background: linear-gradient(-45deg, #1e3a8a, #1e40af, #3730a3, #4338ca);
  background-size: 400% 400%;
  animation: adminGradient 15s ease infinite;
}

@keyframes adminGradient {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* User page background */
body.user-page {
  background: linear-gradient(-45deg, #047857, #059669, #0d9488, #14b8a6);
  background-size: 400% 400%;
  animation: userGradient 15s ease infinite;
}

@keyframes userGradient {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.85);
  z-index: -1;
}

/* ===== App Container ===== */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* ===== Sidebar ===== */
.sidebar {
  width: 260px;
  background: linear-gradient(180deg, var(--dark) 0%, #0f172a 100%);
  color: var(--white);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  z-index: 100;
}

.logo {
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 700;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.logo i {
  color: var(--primary);
  font-size: 1.8rem;
}

.nav-menu {
  flex: 1;
  padding: 20px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  color: var(--gray-400);
  text-decoration: none;
  border-radius: var(--radius);
  transition: var(--transition);
  font-weight: 500;
}

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

.nav-item:hover {
  background: rgba(255,255,255,0.05);
  color: var(--white);
}

.nav-item.active {
  background: var(--primary);
  color: var(--white);
}

.sidebar-footer {
  padding: 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--gray-400);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.user-info i {
  font-size: 1.5rem;
}

.logout-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px;
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9rem;
}

.logout-btn:hover {
  background: rgba(239, 68, 68, 0.3);
  color: #fff;
}

/* ===== Main Content ===== */
.main-content {
  flex: 1;
  margin-left: 260px;
  padding: 24px;
  min-height: 100vh;
}

.page {
  display: none;
  animation: fadeIn 0.3s ease;
}

.page.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Page Header ===== */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.page-header h1 {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--dark);
  display: flex;
  align-items: center;
  gap: 12px;
}

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

.date-display {
  color: var(--gray-400);
  font-size: 0.9rem;
}

/* ===== Dashboard Stats ===== */
.dashboard-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.stat-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.stat-card.total-sales .stat-icon {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: var(--white);
}

.stat-card.daily .stat-icon {
  background: linear-gradient(135deg, #f97316, #ea580c);
  color: var(--white);
}

.stat-card.monthly .stat-icon {
  background: linear-gradient(135deg, #10b981, #059669);
  color: var(--white);
}

.stat-card.yearly .stat-icon {
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
  color: var(--white);
}

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--gray-400);
  font-weight: 500;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark);
}

/* ===== Recent Sales Section ===== */
.recent-sales-section h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.recent-sales-section h2 i {
  color: var(--primary);
}

/* ===== Tables ===== */
.table-container {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}

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

.data-table thead {
  background: var(--gray-100);
}

.data-table th {
  padding: 14px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--gray-200);
}

.data-table tbody tr:hover {
  background: var(--gray-50);
}

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

/* ===== Sell Form ===== */
.sell-form-container {
  max-width: 600px;
  margin: 0 auto;
}

.form-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
}

.form-card h3 {
  font-size: 1.25rem;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--gray-200);
}

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

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--dark);
}

.form-input, .form-select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 1rem;
  transition: var(--transition);
  background: var(--white);
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 1rem;
  margin-bottom: 12px;
}

.btn-search {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: var(--primary);
  color: var(--white);
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 12px;
  margin-left: 8px;
}

.btn-search:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.search-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.search-group .search-input {
  margin-bottom: 0;
  flex: 1;
}

.search-input-restock {
  margin-bottom: 8px;
}

/* ===== Buttons ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--primary);
  color: var(--white);
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--primary);
  color: var(--white);
  border: none;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

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

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: transparent;
  color: var(--gray-400);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.btn-outline:hover {
  border-color: var(--dark);
  color: var(--dark);
}

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

.btn-danger:hover {
  background: #dc2626;
}

/* ===== Filters Section ===== */
.filters-section {
  background: var(--white);
  padding: 20px;
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}

.date-filters {
  display: flex;
  align-items: flex-end;
  gap: 16px;
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.filter-group label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-400);
}

/* ===== Inventory Stats ===== */
.inventory-stats {
  display: flex;
  gap: 24px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.inv-stat {
  background: var(--white);
  padding: 20px 32px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.inv-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--dark);
}

.inv-value.low-stock {
  color: var(--danger);
}

.inv-label {
  font-size: 0.875rem;
  color: var(--gray-400);
}

/* ===== Modal ===== */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--white);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--gray-200);
}

.modal-header h2 {
  font-size: 1.25rem;
  font-weight: 600;
}

.close-modal {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--gray-400);
  cursor: pointer;
  padding: 4px;
  line-height: 1;
}

.close-modal:hover {
  color: var(--dark);
}

#drugForm {
  padding: 24px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

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

.form-actions .btn-primary {
  flex: 1;
}

/* ===== Table Actions ===== */
.action-btns {
  display: flex;
  gap: 8px;
}

.action-btn {
  padding: 6px 12px;
  border: none;
  border-radius: 4px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--transition);
}

.action-btn.edit {
  background: var(--warning);
  color: var(--dark);
}

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

.action-btn:hover {
  opacity: 0.9;
}

/* ===== Stock Status ===== */
.stock-status {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
}

.stock-status.in-stock {
  background: #d1fae5;
  color: #065f46;
}

.stock-status.low-stock {
  background: #fef3c7;
  color: #92400e;
}

.stock-status.out-of-stock {
  background: #fee2e2;
  color: #991b1b;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: -80px;
    width: 80px;
    z-index: 1000;
    background: rgba(30, 41, 59, 0.95);
  }
  
  .show-sidebar {
    left: 0;
  }
  
  .logo {
    justify-content: center;
    background: rgba(37, 99, 235, 0.9);
  }
  
  .nav-item {
    justify-content: center;
    padding: 14px;
    flex-direction: column;
    gap: 4px;
    font-size: 0.75rem;
    color: #fff;
  }
  
  .nav-item i {
    font-size: 1.25rem;
    color: #60a5fa;
  }
  
  .nav-item:hover, .nav-item.active {
    background: rgba(37, 99, 235, 0.8);
  }
  
  .nav-item.active i {
    color: #fff;
  }
  
  .logo i {
    color: #fff;
  }
  
  .logo span {
    display: none;
  }
  
  .nav-item span, .user-info span, .logout-btn span {
    display: none;
  }
  
  .user-info {
    justify-content: center;
    color: #fff;
  }
  
  .user-info i {
    color: #60a5fa;
  }
  
  .logout-btn {
    justify-content: center;
    color: #fca5a5;
  }
  
  .logout-btn i {
    color: #fca5a5;
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .page-header h1 {
    font-size: 1.25rem;
  }
  
  .dashboard-stats {
    grid-template-columns: 1fr;
  }
  
  .table-container {
    overflow-x: auto;
  }
  
  .data-table {
    font-size: 0.75rem;
  }
  
  .form-input, .form-select {
    padding: 12px;
    font-size: 16px;
  }
}

/* ===== Date Group Header ===== */
.date-group-header {
  background: var(--gray-100) !important;
  font-weight: 600;
}

.date-group-header td {
  padding: 10px 16px !important;
  color: var(--dark);
}

/* ===== Filter Buttons ===== */
.filter-buttons {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 8px 16px;
  border: 1px solid var(--gray-300);
  background: var(--white);
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.875rem;
  transition: var(--transition);
}

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

/* ===== Expiry Status ===== */
.expiry-expired { color: var(--danger); font-weight: 600; }
.expiry-soon { color: var(--warning); font-weight: 600; }
.expiry-ok { color: var(--success); font-weight: 600; }

.status-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 500;
}

.status-expired { background: #fee2e2; color: #dc2626; }
.status-soon { background: #fef3c7; color: #d97706; }
.status-ok { background: #d1fae5; color: #059669; }

/* ===== Stock Status ===== */
.stock-status {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
}

.stock-status.stock-high { background: #d1fae5; color: #059669; }
.stock-status.stock-medium { background: #fef3c7; color: #d97706; }
.stock-status.stock-low { background: #fee2e2; color: #dc2626; }
.stock-status.stock-out { background: #fee2e2; color: #991b1b; }

/* ===== Low Stock Notice ===== */
.low-stock-notice {
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 20px;
}

.low-stock-notice h3 {
  color: var(--danger);
  margin-bottom: 10px;
  font-size: 1rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.low-stock-notice ul {
  color: var(--gray-500);
  padding-left: 20px;
}

.low-stock-notice li {
  margin-bottom: 5px;
}

/* ===== Search Group ===== */
.search-group {
  margin-bottom: 20px;
}

.search-input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 1rem;
}

/* ===== Admin Only Elements ===== */
.admin-only {
  display: none;
}