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

:root {
  --bg-primary: #f5f5f7;
  --bg-white: #ffffff;
  --text-primary: #1d1d1f;
  --text-secondary: #86868b;
  --accent-blue: #0071e3;
  --accent-blue-hover: #0077ed;
  --border-color: #d2d2d7;
  --sidebar-bg: #1d1d1f;
  --sidebar-text: #f5f5f7;
  --success: #34c759;
  --warning: #ff9500;
  --danger: #ff3b30;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
}

/* ==================== Login Modal ==================== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #1d1d1f 0%, #2d2d30 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.login-container {
  background: var(--bg-white);
  padding: 48px;
  border-radius: 20px;
  width: 100%;
  max-width: 380px;
  text-align: center;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.login-logo {
  font-size: 64px;
  margin-bottom: 16px;
}

.login-container h1 {
  font-size: 28px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.login-container h2 {
  font-size: 18px;
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

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

.input-group input {
  width: 100%;
  padding: 14px 16px;
  font-size: 16px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input-group input:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.1);
}

.login-btn {
  width: 100%;
  padding: 14px;
  font-size: 16px;
  font-weight: 500;
  color: white;
  background: var(--accent-blue);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  margin-top: 8px;
}

.login-btn:hover {
  background: var(--accent-blue-hover);
}

.login-btn:active {
  transform: scale(0.98);
}

.login-btn:disabled {
  background: var(--text-secondary);
  cursor: not-allowed;
}

.error-msg {
  color: var(--danger);
  font-size: 14px;
  margin-top: 12px;
  min-height: 20px;
}

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

/* ==================== Sidebar ==================== */
.sidebar {
  width: 220px;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  left: 0;
  top: 0;
}

.sidebar-header {
  padding: 24px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header .logo {
  font-size: 28px;
}

.sidebar-header .logo-text {
  font-size: 18px;
  font-weight: 600;
}

.nav-menu {
  list-style: none;
  padding: 16px 12px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.2s;
  margin-bottom: 4px;
  font-size: 15px;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.1);
}

.nav-item.active {
  background: rgba(255, 255, 255, 0.15);
}

.nav-icon {
  font-size: 18px;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.admin-name {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}

.logout-btn {
  padding: 6px 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}

.logout-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: white;
}

/* ==================== Main Content ==================== */
.main-content {
  flex: 1;
  margin-left: 220px;
  min-height: 100vh;
}

.header {
  background: var(--bg-white);
  padding: 16px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.page-title {
  font-size: 20px;
  font-weight: 600;
}

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

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-primary);
  border-radius: 10px;
  padding: 8px 16px;
  gap: 8px;
}

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 14px;
  width: 200px;
  color: var(--text-primary);
}

.search-box input::placeholder {
  color: var(--text-secondary);
}

.search-icon {
  font-size: 14px;
  opacity: 0.6;
}

.refresh-btn {
  width: 36px;
  height: 36px;
  border: none;
  background: var(--bg-primary);
  border-radius: 10px;
  cursor: pointer;
  font-size: 16px;
  transition: background 0.2s, transform 0.2s;
}

.refresh-btn:hover {
  background: #e8e8ed;
}

.refresh-btn:active {
  transform: rotate(180deg);
}

.content {
  padding: 32px;
}

/* ==================== Stats Grid ==================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--bg-white);
  border-radius: 16px;
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
}

.stat-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--accent-blue) 0%, #5856d6 100%);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.stat-info {
  flex: 1;
}

.stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ==================== Cards ==================== */
.card {
  background: var(--bg-white);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.activity-info p {
  padding: 8px 0;
  color: var(--text-secondary);
  font-size: 15px;
}

/* ==================== Tables ==================== */
.table-container {
  background: var(--bg-white);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

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

.data-table th {
  text-align: left;
  padding: 16px 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  background: #f5f5f7;
  border-bottom: 1px solid var(--border-color);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.data-table td {
  padding: 16px 20px;
  font-size: 14px;
  border-bottom: 1px solid #f0f0f2;
  vertical-align: middle;
}

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

.data-table tbody tr:hover {
  background: #f8f8fa;
}

.data-table .loading {
  text-align: center;
  color: var(--text-secondary);
  padding: 40px 20px;
}

/* ==================== User Avatar & Cell ==================== */
.user-cell {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-blue) 0%, #5856d6 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 16px;
  flex-shrink: 0;
}

.avatar img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

.user-name {
  font-weight: 500;
}

/* ==================== Status Tags ==================== */
.role-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
}

.role-tag.admin {
  background: rgba(0, 113, 227, 0.1);
  color: var(--accent-blue);
}

.role-tag.user {
  background: rgba(120, 120, 128, 0.12);
  color: var(--text-secondary);
}

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

.action-btn {
  padding: 6px 12px;
  font-size: 13px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}

.action-btn.view {
  background: rgba(0, 113, 227, 0.1);
  color: var(--accent-blue);
}

.action-btn.view:hover {
  background: rgba(0, 113, 227, 0.2);
}

.action-btn.delete {
  background: rgba(255, 59, 48, 0.1);
  color: var(--danger);
}

.action-btn.delete:hover {
  background: rgba(255, 59, 48, 0.2);
}

/* ==================== Pagination ==================== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  padding: 24px;
}

.page-btn {
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--border-color);
  background: var(--bg-white);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s;
}

.page-btn:hover:not(:disabled) {
  background: var(--bg-primary);
  border-color: var(--text-secondary);
}

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

.page-info {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ==================== Toast ==================== */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--text-primary);
  color: white;
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 500;
  opacity: 0;
  transition: transform 0.3s, opacity 0.3s;
  z-index: 2000;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.toast.success {
  background: var(--success);
}

.toast.error {
  background: var(--danger);
}

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

.empty-state .empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state p {
  font-size: 15px;
}

/* ==================== Responsive ==================== */
@media (max-width: 1024px) {
  .sidebar {
    width: 180px;
  }
  
  .main-content {
    margin-left: 180px;
  }
}

@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
    flex-direction: row;
    overflow-x: auto;
  }
  
  .sidebar-header {
    display: none;
  }
  
  .nav-menu {
    display: flex;
    padding: 8px;
    gap: 4px;
  }
  
  .nav-item {
    padding: 10px 14px;
    font-size: 13px;
    white-space: nowrap;
  }
  
  .sidebar-footer {
    display: none;
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .header {
    padding: 12px 16px;
  }
  
  .content {
    padding: 16px;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .data-table {
    font-size: 13px;
  }
  
  .data-table th,
  .data-table td {
    padding: 12px 10px;
  }
}