/* ==========================================================================
   CHSI ADMIN UNIFIED DESIGN SYSTEM
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  /* Brand Colors */
  --primary: #667eea;
  --primary-hover: #5a67d8;
  --primary-dark: #4c51bf;
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --secondary: #6b7280;
  
  /* Status Colors */
  --success: #10b981;
  --success-dark: #059669;
  --success-light: #d1fae5;
  --warning: #f59e0b;
  --warning-dark: #d97706;
  --warning-light: #fef3c7;
  --danger: #ef4444;
  --danger-dark: #dc2626;
  --danger-light: #fee2e2;
  --info: #3b82f6;
  --info-dark: #2563eb;
  --info-light: #dbeafe;
  
  /* Background & Surface Colors */
  --bg-main: #f4f7fe;
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --border-color: #e5e7eb;
  --border-light: #f1f5f9;
  
  /* Text Colors */
  --text-main: #1f2937;
  --text-secondary: #4b5563;
  --text-muted: #6b7280;
  --text-light: #9ca3af;
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  /* Sizing & Spacing */
  --sidebar-width: 260px;
  --sidebar-collapsed-width: 80px;
  --header-height: 70px;
  
  /* Borders & Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.08);
  --shadow-primary: 0 4px 15px rgba(102, 126, 234, 0.35);
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.5;
  font-size: 0.9rem;
  position: relative;
  min-height: 100vh;
}

body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: -1;
  background-image: url('img/chsi_bg.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  pointer-events: none;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-hover);
}

/* ==========================================================================
   Layout Containers
   ========================================================================== */
.main-content, .content-wrapper, .dashboard-container {
  margin-left: var(--sidebar-width);
  padding: 2rem;
  min-height: 100vh;
  transition: margin-left var(--transition-normal);
}

/* ==========================================================================
   Sidebar Navigation
   ========================================================================== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-right: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  z-index: 999;
  display: flex;
  flex-direction: column;
  transition: width var(--transition-normal), transform var(--transition-normal);
}

.sidebar-brand {
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  border-bottom: 1px solid var(--border-light);
  gap: 0.75rem;
}

.sidebar-brand img {
  height: 36px;
  width: auto;
}

.sidebar-brand span {
  font-weight: 800;
  font-size: 1.15rem;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
}

.sidebar-menu {
  list-style: none;
  padding: 1rem 0.75rem;
  margin: 0;
  flex: 1;
  overflow-y: auto;
}

.nav-item {
  margin-bottom: 0.25rem;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-link i {
  font-size: 1.1rem;
  width: 20px;
  text-align: center;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.nav-link:hover {
  background-color: var(--surface-alt);
  color: var(--primary);
}

.nav-link:hover i {
  color: var(--primary);
}

.nav-link.active {
  background: var(--primary-gradient);
  color: #ffffff !important;
  box-shadow: var(--shadow-primary);
}

.nav-link.active i {
  color: #ffffff !important;
}

/* ==========================================================================
   Header / Topbar
   ========================================================================== */
.top-header, .topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface);
  padding: 1rem 1.75rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.75rem;
  border: 1px solid var(--border-light);
}

.page-title {
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--text-main);
  margin: 0;
  letter-spacing: -0.02em;
}

/* ==========================================================================
   Cards & Widgets
   ========================================================================== */
.card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.stat-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition-normal);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  background: rgba(102, 126, 234, 0.1);
  color: var(--primary);
}

.stat-val {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.2;
}

.stat-lbl {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* ==========================================================================
   Data Tables
   ========================================================================== */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

table, .table, .table-custom {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.85rem;
}

th {
  background: var(--surface-alt) !important;
  font-weight: 700 !important;
  color: #475569 !important;
  font-size: 0.725rem !important;
  text-transform: uppercase !important;
  letter-spacing: 0.05em !important;
  padding: 0.85rem 1rem !important;
  border-bottom: 1px solid var(--border-color) !important;
  border-top: none !important;
  text-align: left;
}

td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
  vertical-align: middle;
}

tbody tr {
  transition: background-color var(--transition-fast);
}

tbody tr:hover {
  background-color: rgba(102, 126, 234, 0.025);
}

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

/* ==========================================================================
   Buttons & Controls
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.875rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-family);
  line-height: 1.25;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff !important;
  box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
  opacity: 0.93;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.45);
}

.btn-secondary {
  background: var(--surface-alt);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

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

.btn-success {
  background-color: var(--success);
  color: #ffffff;
}

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

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

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

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   Form Controls
   ========================================================================== */
.form-control, input[type="text"], input[type="password"], input[type="email"], input[type="search"], select, textarea {
  width: 100%;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--surface);
  color: var(--text-main);
  font-family: var(--font-family);
  font-size: 0.875rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-input, .relative input[type="text"].search-input, input.search-input, .pl-12, input.pl-12, .form-control.pl-12, .form-control-search.pl-12, input.form-control-search {
  padding-left: 3.25rem !important;
}

.form-control:focus, input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.18);
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.825rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

/* ==========================================================================
   Badges & Status Pills
   ========================================================================== */
.badge, .status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: capitalize;
}

.badge-success, .status-completed {
  background-color: var(--success-light);
  color: var(--success-dark);
}

.badge-warning, .status-pending {
  background-color: var(--warning-light);
  color: var(--warning-dark);
}

.badge-danger, .status-cancelled {
  background-color: var(--danger-light);
  color: var(--danger-dark);
}

.badge-info, .status-processing {
  background-color: var(--info-light);
  color: var(--info-dark);
}

/* ==========================================================================
   Modals
   ========================================================================== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(6px);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-content {
  background: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  max-width: 600px;
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--border-light);
  animation: modalFadeIn 0.25s ease;
}

.modal-header {
  padding: 1.25rem 1.75rem;
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-main);
  margin: 0;
}

.modal-body {
  padding: 1.75rem;
}

.modal-footer {
  padding: 1rem 1.75rem;
  background: var(--surface-alt);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
}

@keyframes modalFadeIn {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

/* ==========================================================================
   Responsive Overlay & Table Containers
   ========================================================================== */
.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
  z-index: 99990;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.sidebar-overlay.active {
  opacity: 1;
  visibility: visible;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-bottom: 1rem;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  body {
    padding-left: 0 !important;
  }
  body.sidebar-collapsed {
    padding-left: 0 !important;
  }
  .nav-inner {
    padding-left: 1rem !important;
    padding-right: 1rem !important;
  }
  .main-content, .content-wrapper, .dashboard-container, .main-container, .container-main {
    margin-left: 0 !important;
    margin-right: 0 !important;
    padding: 1.25rem 1rem !important;
    width: 100% !important;
    max-width: 100vw !important;
  }
  .sidebar {
    transform: translateX(-100%) !important;
    z-index: 99995 !important;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
  }
  .sidebar.open, .sidebar.active {
    transform: translateX(0) !important;
  }
  .modal-content, .form-container-view {
    max-width: 95vw !important;
    max-height: 90vh !important;
    overflow-y: auto !important;
  }
}

@media (max-width: 768px) {
  .main-content, .content-wrapper, .dashboard-container, .main-container, .container-main {
    padding: 1rem 0.75rem !important;
    margin: 12px 8px !important;
  }
  .top-header, .topbar {
    padding: 0.75rem 1rem !important;
    flex-wrap: wrap;
    gap: 0.75rem;
  }
  .stat-card {
    padding: 1rem;
  }
  .download-sort-container {
    flex-direction: column;
    width: 100%;
    align-items: stretch;
  }
  .download-sort-container > * {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .main-content, .content-wrapper, .dashboard-container, .main-container, .container-main {
    padding: 0.75rem 0.5rem !important;
    margin: 8px 4px !important;
  }
  .card, .stat-card {
    padding: 1rem 0.75rem !important;
  }
  .modal-body {
    padding: 1rem !important;
  }
  .login-container, .register-container {
    padding: 1.25rem 1rem !important;
    margin: 0.5rem !important;
    max-width: calc(100vw - 1rem) !important;
  }
}

/* ==========================================================================
   Footer Layout Fix (shifts with sidebar)
   ========================================================================== */
footer.site-footer {
  background: #2d3748;
  color: rgba(255,255,255,0.85);
  text-align: center;
  padding: 1.5rem 1rem;
  margin-top: auto;
  flex-shrink: 0;
}