/**
 * Responsive Styles
 * ContactsNote - Personal Relationship Management System
 * 
 * This file contains responsive styles and mobile-first design patterns
 * for the ContactsNote application ensuring optimal experience across all devices.
 * 
 * @author ContactsNote Development Team
 * @version 1.0
 * @since 2025-07-26
 */

/* ===== MOBILE FIRST APPROACH ===== */

/* Base styles are mobile-first (320px and up) */

/* ===== SMALL DEVICES (576px and up) ===== */
@media (min-width: 576px) {
  .container {
    max-width: 540px;
  }
  
  /* Forms */
  .form-row {
    display: flex;
    gap: var(--spacing-3);
  }
  
  .form-row .form-group {
    flex: 1;
  }
  
  /* Cards */
  .card-deck {
    display: flex;
    gap: var(--spacing-4);
  }
  
  .card-deck .card {
    flex: 1;
  }
  
  /* Buttons */
  .btn-group {
    display: flex;
    gap: var(--spacing-2);
  }
  
  .btn-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-3);
  }
  
  /* Navigation adjustments */
  .navbar-nav {
    flex-direction: row;
  }
  
  .nav-item {
    margin: 0 var(--spacing-1);
  }
}

/* ===== MEDIUM DEVICES (768px and up) ===== */
@media (min-width: 768px) {
  .container {
    max-width: 720px;
  }
  
  /* Layout improvements */
  .app-content {
    padding: var(--spacing-8) 0;
  }
  
  /* Dashboard layout */
  .dashboard-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-6);
    align-items: start;
  }
  
  .main-content {
    min-width: 0; /* Prevent grid blowout */
  }
  
  .sidebar {
    position: sticky;
    top: calc(var(--spacing-8) + 80px); /* Account for header height */
  }
  
  /* Contact grid improvements */
  .contact-list {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
  
  /* Task layout */
  .task-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-4);
  }
  
  /* Stats grid */
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  /* Form layouts */
  .form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-4);
  }
  
  .form-grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .form-group-full {
    grid-column: 1 / -1;
  }
  
  /* Modal improvements */
  .modal {
    max-width: 600px;
  }
  
  .modal-lg {
    max-width: 800px;
  }
  
  /* Table responsiveness */
  .table-responsive {
    overflow-x: visible;
  }
  
  /* Navigation improvements */
  .navbar-collapse {
    display: flex !important;
    position: static;
    background: none;
    border: none;
    flex-direction: row;
    padding: 0;
  }
  
  .navbar-toggle {
    display: none !important;
  }
  
  /* Interaction timeline */
  .interaction-timeline {
    padding-left: var(--spacing-10);
  }
  
  .interaction-item::before {
    left: calc(-1 * var(--spacing-10) + var(--spacing-3));
  }
  
  /* Search and filters */
  .search-and-filters {
    display: flex;
    gap: var(--spacing-4);
    align-items: center;
  }
  
  .search-bar {
    flex: 1;
    margin-bottom: 0;
  }
  
  .search-filters {
    flex-shrink: 0;
    margin-bottom: 0;
  }
}

/* ===== LARGE DEVICES (992px and up) ===== */
@media (min-width: 992px) {
  .container {
    max-width: 960px;
  }
  
  /* Enhanced dashboard layout */
  .dashboard-layout {
    grid-template-columns: 250px 1fr 300px;
  }
  
  .dashboard-sidebar {
    position: sticky;
    top: calc(var(--spacing-8) + 80px);
  }
  
  /* Contact list improvements */
  .contact-list {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  }
  
  /* Stats grid */
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  /* Task layout */
  .task-board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-4);
  }
  
  .task-column {
    background: var(--gray-100);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-4);
  }
  
  .task-column-header {
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-4);
    padding-bottom: var(--spacing-2);
    border-bottom: 2px solid var(--gray-200);
  }
  
  /* Enhanced forms */
  .form-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .form-grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
  
  /* Modal improvements */
  .modal {
    max-width: 700px;
  }
  
  .modal-xl {
    max-width: 1000px;
  }
  
  /* Data tables */
  .data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
  }
  
  .data-table th,
  .data-table td {
    padding: var(--spacing-3) var(--spacing-4);
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
  }
  
  .data-table th {
    background: var(--gray-50);
    font-weight: var(--font-weight-semibold);
    color: var(--gray-700);
  }
  
  .data-table tbody tr:hover {
    background: var(--gray-50);
  }
  
  /* Advanced navigation */
  .sidebar-nav {
    position: fixed;
    top: 80px; /* Header height */
    left: 0;
    width: 250px;
    height: calc(100vh - 80px);
    background: var(--white);
    border-right: 1px solid var(--gray-200);
    padding: var(--spacing-4);
    overflow-y: auto;
    z-index: var(--z-fixed);
  }
  
  .main-content-with-sidebar {
    margin-left: 250px;
  }
  
  .sidebar-nav-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-3) var(--spacing-4);
    color: var(--gray-600);
    text-decoration: none;
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-1);
    transition: all var(--transition-fast);
  }
  
  .sidebar-nav-item:hover,
  .sidebar-nav-item.active {
    background: var(--primary-color);
    color: var(--white);
    text-decoration: none;
  }
  
  .sidebar-nav-item i {
    margin-right: var(--spacing-3);
    width: 20px;
    text-align: center;
  }
}

/* ===== EXTRA LARGE DEVICES (1200px and up) ===== */
@media (min-width: 1200px) {
  .container {
    max-width: 1140px;
  }
  
  /* Maximum layout optimization */
  .dashboard-layout {
    grid-template-columns: 280px 1fr 350px;
  }
  
  /* Contact grid */
  .contact-list {
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  }
  
  /* Task board */
  .task-board {
    grid-template-columns: repeat(4, 1fr);
  }
  
  /* Enhanced stats */
  .stats-grid {
    grid-template-columns: repeat(6, 1fr);
  }
  
  .stat-card-wide {
    grid-column: span 2;
  }
  
  /* Large modals */
  .modal-xl {
    max-width: 1200px;
  }
  
  /* Sidebar improvements */
  .sidebar-nav {
    width: 280px;
  }
  
  .main-content-with-sidebar {
    margin-left: 280px;
  }
}

/* ===== ULTRA WIDE SCREENS (1400px and up) ===== */
@media (min-width: 1400px) {
  .container {
    max-width: 1320px;
  }
  
  /* Ultra wide optimizations */
  .contact-list {
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  }
  
  .task-board {
    grid-template-columns: repeat(5, 1fr);
  }
  
  .dashboard-layout {
    grid-template-columns: 300px 1fr 1fr 350px;
  }
}

/* ===== MOBILE SPECIFIC OPTIMIZATIONS ===== */

/* Very small screens (max-width: 374px) */
@media (max-width: 374px) {
  .container {
    padding: 0 var(--spacing-2);
  }
  
  .card-body {
    padding: var(--spacing-3);
  }
  
  .btn {
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--font-size-sm);
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-3);
  }
  
  .stat-card {
    padding: var(--spacing-4);
  }
  
  .contact-card {
    padding: var(--spacing-3);
  }
  
  .task-card {
    padding: var(--spacing-3);
  }
  
  .modal {
    margin: var(--spacing-2);
    max-width: calc(100% - 1rem);
  }
  
  .modal-header,
  .modal-body,
  .modal-footer {
    padding: var(--spacing-4);
  }
}

/* Mobile landscape optimizations */
@media (max-width: 767px) and (orientation: landscape) {
  .app-header {
    position: sticky;
  }
  
  .modal {
    max-height: 85vh;
  }
  
  .sidebar-nav {
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
  }
  
  .sidebar-nav.show {
    transform: translateX(0);
  }
}

/* ===== TOUCH DEVICE OPTIMIZATIONS ===== */
@media (hover: none) and (pointer: coarse) {
  /* Increase touch targets */
  .btn {
    min-height: 44px;
    padding: var(--spacing-3) var(--spacing-4);
  }
  
  .nav-link {
    min-height: 44px;
    padding: var(--spacing-3) var(--spacing-4);
  }
  
  .form-control {
    min-height: 44px;
  }
  
  .contact-card,
  .task-card,
  .interaction-item {
    cursor: default;
  }
  
  /* Remove hover effects on touch devices */
  .contact-card:hover {
    transform: none;
    box-shadow: var(--shadow-sm);
  }
  
  .btn:hover {
    transform: none;
  }
  
  /* Improve tap highlights */
  .btn,
  .nav-link,
  .contact-card,
  .task-card {
    -webkit-tap-highlight-color: rgba(37, 99, 235, 0.1);
  }
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .loading-spinner {
    animation: none;
  }
}

/* ===== HIGH CONTRAST MODE ===== */
@media (prefers-contrast: high) {
  :root {
    --gray-100: #e5e5e5;
    --gray-200: #cccccc;
    --gray-300: #999999;
    --gray-400: #666666;
    --gray-500: #333333;
  }
  
  .btn {
    border-width: 2px;
  }
  
  .form-control {
    border-width: 2px;
  }
  
  .card {
    border-width: 2px;
  }
}

/* ===== PRINT STYLES ===== */
@media print {
  /* Hide navigation and interactive elements */
  .navbar,
  .btn,
  .pagination,
  .modal-backdrop,
  .toast-container,
  .loading-overlay {
    display: none !important;
  }
  
  /* Optimize for print */
  body {
    font-size: 12pt;
    line-height: 1.4;
    color: #000;
    background: #fff;
  }
  
  .container {
    max-width: none;
    padding: 0;
  }
  
  .card {
    border: 1px solid #000;
    box-shadow: none;
    page-break-inside: avoid;
  }
  
  h1, h2, h3, h4, h5, h6 {
    page-break-after: avoid;
  }
  
  .contact-list {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  /* Ensure links show URL */
  a[href^="http"]:after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #666;
  }
  
  /* Page breaks */
  .page-break {
    page-break-before: always;
  }
  
  .no-page-break {
    page-break-inside: avoid;
  }
}

/* ===== ACCESSIBILITY IMPROVEMENTS ===== */

/* Focus improvements */
.btn:focus-visible,
.form-control:focus-visible,
.nav-link:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Screen reader only content */
.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;
}

.sr-only-focusable:focus {
  position: static;
  width: auto;
  height: auto;
  padding: var(--spacing-2) var(--spacing-3);
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

/* Skip links */
.skip-links {
  position: absolute;
  top: -40px;
  left: 6px;
  z-index: 999999;
  color: var(--white);
  background: var(--gray-900);
  text-decoration: none;
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--border-radius);
}

.skip-links:focus {
  top: 6px;
}

/* ===== BROWSER SPECIFIC FIXES ===== */

/* Safari specific fixes */
@media not all and (min-resolution: 0.001dpcm) {
  @supports (-webkit-appearance: none) {
    .form-control {
      -webkit-appearance: none;
    }
    
    .form-select {
      -webkit-appearance: none;
    }
  }
}

/* Firefox specific fixes */
@-moz-document url-prefix() {
  .form-control {
    -moz-appearance: none;
  }
}