/**
 * Responsive Design Improvements for BigData System
 * This file enhances mobile compatibility and responsive design
 */

/* Root Variables for Consistent Design */
:root {
  /* Colors */
  --color-primary: #007bff;
  --color-secondary: #6c757d;
  --color-success: #28a745;
  --color-warning: #ffc107;
  --color-danger: #dc3545;
  --color-info: #17a2b8;
  --color-light: #f8f9fa;
  --color-dark: #343a40;
  
  /* Typography */
  --font-primary: 'Prompt', sans-serif;
  --font-display: 'Kanit', sans-serif;
  --font-size-base: 16px;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 600;
  --line-height-base: 1.6;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 3rem;
  
  /* Breakpoints */
  --breakpoint-sm: 576px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 992px;
  --breakpoint-xl: 1200px;
  
  /* Shadows */
  --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  --shadow-md: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
  
  /* Border radius */
  --border-radius: 0.375rem;
  --border-radius-lg: 0.5rem;
  --border-radius-xl: 1rem;
}

/* Enhanced Typography */
html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Responsive Typography */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }
  h4 { font-size: 1.125rem; }
  h5 { font-size: 1rem; }
  h6 { font-size: 0.875rem; }
}

@media (max-width: 576px) {
  html {
    font-size: 13px;
  }
  
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }
  h3 { font-size: 1.125rem; }
}

/* Enhanced DataTables Responsive */
.dataTables_wrapper {
  width: 100%;
  overflow-x: auto;
}

.table-responsive-stack {
  display: block;
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

@media (max-width: 768px) {
  .table-responsive-stack thead {
    display: none;
  }
  
  .table-responsive-stack tbody,
  .table-responsive-stack tr,
  .table-responsive-stack td {
    display: block;
    width: 100%;
  }
  
  .table-responsive-stack tr {
    border: 1px solid #dee2e6;
    margin-bottom: var(--spacing-md);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm);
    background: white;
    box-shadow: var(--shadow-sm);
  }
  
  .table-responsive-stack td {
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    position: relative;
    padding-left: 35% !important;
    text-align: right;
  }
  
  .table-responsive-stack td:before {
    content: attr(data-label);
    position: absolute;
    left: var(--spacing-sm);
    width: 30%;
    padding-right: var(--spacing-sm);
    white-space: nowrap;
    text-align: left;
    font-weight: var(--font-weight-medium);
    color: var(--color-dark);
  }
}

/* Touch-Friendly Interface Elements */
.btn,
.nav-link,
.dropdown-item,
.form-control,
.btn-app {
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: manipulation;
}

/* Enhanced Mobile Navigation */
@media (max-width: 768px) {
  .main-sidebar {
    width: 100vw !important;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 1050;
  }
  
  .main-sidebar.sidebar-open {
    transform: translateX(0);
  }
  
  .sidebar-dark-primary .nav-sidebar > .nav-item > .nav-link {
    padding: var(--spacing-md);
    font-size: 1.1rem;
  }
  
  .nav-sidebar .nav-item > .nav-link > .nav-icon {
    margin-right: var(--spacing-md);
    width: 24px;
    text-align: center;
  }
}

/* Mobile-Optimized Cards */
@media (max-width: 576px) {
  .card {
    margin: var(--spacing-xs);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
  }
  
  .card-body {
    padding: var(--spacing-md);
  }
  
  .card-header {
    padding: var(--spacing-sm) var(--spacing-md);
  }
}

/* Enhanced Form Controls */
.form-control {
  border-radius: var(--border-radius);
  border: 1px solid #dee2e6;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

@media (max-width: 768px) {
  .form-control {
    font-size: 16px; /* Prevent zoom on iOS */
    padding: var(--spacing-md);
  }
  
  .input-group {
    flex-direction: column;
  }
  
  .input-group .form-control {
    border-radius: var(--border-radius) var(--border-radius) 0 0;
  }
  
  .input-group-append .input-group-text {
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    width: 100%;
    justify-content: center;
  }
}

/* Responsive Images */
.img-responsive,
.brand-image {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Enhanced Progress Bars */
.progress {
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.progress-bar {
  transition: width 0.6s ease;
}

/* Mobile-Friendly Tables */
.table {
  font-size: 0.9rem;
}

@media (max-width: 992px) {
  .table {
    font-size: 0.8rem;
  }
}

@media (max-width: 768px) {
  .table {
    font-size: 0.75rem;
  }
  
  .table th,
  .table td {
    padding: var(--spacing-xs);
    vertical-align: middle;
  }
}

/* Loading States */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.8);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.loading-spinner {
  width: 3rem;
  height: 3rem;
  border: 0.3rem solid var(--color-light);
  border-top: 0.3rem solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Enhanced Alerts */
.alert {
  border-radius: var(--border-radius);
  border: none;
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-md);
}

.alert-dismissible .close {
  padding: var(--spacing-md);
}

/* Responsive Content Wrapper */
@media (max-width: 768px) {
  .content-wrapper {
    margin-left: 0 !important;
    padding: var(--spacing-sm);
  }
  
  .content-header {
    padding: var(--spacing-md) var(--spacing-sm);
  }
  
  .content-header h1,
  .content-header h2,
  .content-header h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
  }
}

/* Enhanced Buttons */
.btn {
  border-radius: var(--border-radius);
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-sm) var(--spacing-md);
  transition: all 0.15s ease-in-out;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-app {
  margin: var(--spacing-xs);
  border-radius: var(--border-radius-lg);
  min-width: 120px;
}

@media (max-width: 576px) {
  .btn-app {
    width: 100%;
    margin: var(--spacing-xs) 0;
  }
}

/* Enhanced DataTable Controls */
.dataTables_length,
.dataTables_filter,
.dataTables_info,
.dataTables_paginate {
  margin: var(--spacing-sm) 0;
}

@media (max-width: 768px) {
  .dataTables_length,
  .dataTables_filter {
    text-align: center;
  }
  
  .dataTables_length select,
  .dataTables_filter input {
    width: 100%;
    margin: var(--spacing-xs) 0;
  }
  
  .dataTables_paginate {
    text-align: center;
  }
  
  .dataTables_paginate .paginate_button {
    padding: var(--spacing-sm);
    margin: var(--spacing-xs);
  }
}

/* Print Styles */
@media print {
  .sidebar,
  .main-header,
  .btn,
  .dataTables_filter,
  .dataTables_length,
  .dataTables_paginate {
    display: none !important;
  }
  
  .content-wrapper {
    margin-left: 0 !important;
  }
  
  .table {
    font-size: 12px;
  }
}

/* Accessibility Improvements */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus indicators */
*:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.btn:focus,
.form-control:focus {
  outline: none;
  box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .btn {
    border: 2px solid currentColor;
  }
  
  .table {
    border: 2px solid currentColor;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}