/* KingKit Operations System - Main Styles */

:root {
  /* Brand Colors */
  --primary-color: #3b82f6;
  --primary-hover: #2563eb;
  --secondary-color: #64748b;
  --success-color: #22c55e;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;

  /* Layout */
  --sidebar-width: 260px;
  --header-height: 60px;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);

  /* Font */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans TC', sans-serif;
}

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

html, body {
  height: 100%;
  font-family: var(--font-family);
  font-size: 14px;
  line-height: 1.5;
  color: #1e293b;
  background-color: #f8fafc;
}

#app {
  min-height: 100vh;
}

/* Loading Container */
.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  gap: var(--spacing-md);
  color: var(--secondary-color);
}

/* App Layout */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.app-sidebar {
  width: var(--sidebar-width);
  background: linear-gradient(180deg, #1e40af 0%, #1e3a8a 100%);
  color: white;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
}

.sidebar-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-logo {
  font-size: 1.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.sidebar-nav {
  padding: var(--spacing-md);
}

.nav-section {
  margin-bottom: var(--spacing-lg);
}

.nav-section-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  margin-bottom: var(--spacing-sm);
  padding: 0 var(--spacing-md);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
}

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

.nav-item.active {
  background: rgba(255,255,255,0.2);
  color: white;
}

/* Main Content */
.app-main {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
}

/* Header */
.app-header {
  height: var(--header-height);
  background: white;
  border-bottom: 1px solid #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-lg);
  position: sticky;
  top: 0;
  z-index: 50;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* Page Content */
.page-content {
  flex: 1;
  padding: var(--spacing-lg);
}

/* Cards */
.card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-lg);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
}

/* KPI Cards */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.kpi-card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-lg);
}

.kpi-label {
  color: var(--secondary-color);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-xs);
}

.kpi-value {
  font-size: 2rem;
  font-weight: 700;
  color: #1e293b;
}

.kpi-change {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.875rem;
  margin-top: var(--spacing-sm);
}

.kpi-change.positive {
  color: var(--success-color);
}

.kpi-change.negative {
  color: var(--danger-color);
}

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

.data-table th,
.data-table td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid #e2e8f0;
}

.data-table th {
  font-weight: 600;
  color: var(--secondary-color);
  background: #f8fafc;
}

.data-table tbody tr:hover {
  background: #f8fafc;
}

/* Forms */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

/* Login Page */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #1e40af 0%, #7c3aed 100%);
}

.login-card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-xl);
  width: 100%;
  max-width: 400px;
}

.login-logo {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.login-logo h1 {
  font-size: 1.5rem;
  color: #1e40af;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--secondary-color); }
.text-success { color: var(--success-color); }
.text-warning { color: var(--warning-color); }
.text-danger { color: var(--danger-color); }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }
.gap-3 { gap: var(--spacing-lg); }

/* Responsive */
@media (max-width: 768px) {
  .app-sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s;
  }

  .app-sidebar.open {
    transform: translateX(0);
  }

  .app-main {
    margin-left: 0;
  }
}