/* ===================================================
   Responsive Design - Mobile First
   =================================================== */

/* Base styles already defined for mobile in style.css */

/* ===================================================
   Tablet (768px and up)
   =================================================== */

@media screen and (min-width: 768px) {
  /* Body */
  body {
    padding-top: var(--header-height-desktop);
  }
  
  /* Header */
  .header-container {
    height: var(--header-height-desktop);
    padding: 0 var(--spacing-6);
  }
  
  .header-title {
    font-size: var(--font-size-2xl);
  }
  
  .nav-tab {
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-base);
  }
  
  .tab-icon {
    font-size: var(--font-size-lg);
  }
  
  /* Main Content */
  .main-content {
    min-height: calc(100vh - var(--header-height-desktop) - 80px);
    padding: var(--spacing-8) 0;
  }
  
  .content-section {
    padding: 0 var(--spacing-6);
  }
  
  .section-title {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-8);
  }
  
  /* Forms */
  .form-group {
    margin-bottom: var(--spacing-5);
  }
  
  .form-input,
  .form-select {
    padding: var(--spacing-4);
    font-size: var(--font-size-lg);
  }
  
  /* Expense Input */
  .expense-input-container {
    max-width: var(--max-width-2xl);
    margin: 0 auto;
  }
  
  .expense-form {
    background: var(--color-white);
    padding: var(--spacing-8);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
  }
  
  .form-actions {
    display: flex;
    gap: var(--spacing-4);
    justify-content: flex-end;
    margin-top: var(--spacing-6);
  }
  
  .quick-actions {
    margin-top: var(--spacing-8);
    padding: var(--spacing-6);
    background: var(--color-white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-sm);
  }
  
  .quick-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-3);
  }
  
  /* Expense List */
  .list-controls {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-6);
    align-items: end;
  }
  
  .filter-controls {
    display: flex;
    gap: var(--spacing-3);
  }
  
  .monthly-summary {
    background: var(--color-white);
    padding: var(--spacing-6);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-6);
  }
  
  .summary-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-6);
    margin-top: var(--spacing-4);
  }
  
  /* Statistics */
  .statistics-container {
    max-width: var(--max-width-5xl);
    margin: 0 auto;
  }
  
  .period-selector {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-8);
  }
  
  .stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-8);
  }
  
  .charts-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
  }
  
  /* Settings */
  .settings-container {
    max-width: var(--max-width-3xl);
    margin: 0 auto;
  }
  
  .settings-group {
    background: var(--color-white);
    padding: var(--spacing-6);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-6);
  }
  
  /* Toast Container */
  .toast-container {
    top: calc(var(--header-height-desktop) + var(--spacing-4));
  }
}

/* ===================================================
   Desktop (1024px and up)
   =================================================== */

@media screen and (min-width: 1024px) {
  /* Header */
  .header-container {
    padding: 0 var(--spacing-8);
  }
  
  .nav-tab {
    padding: var(--spacing-3) var(--spacing-5);
    min-width: 100px;
  }
  
  /* Main Content */
  .main-content {
    padding: var(--spacing-10) 0;
  }
  
  .content-section {
    padding: 0 var(--spacing-8);
  }
  
  /* Expense Input */
  .expense-form {
    padding: var(--spacing-10);
  }
  
  .form-group {
    margin-bottom: var(--spacing-6);
  }
  
  .expense-form .form-group:nth-child(1),
  .expense-form .form-group:nth-child(2) {
    display: inline-block;
    width: calc(50% - var(--spacing-2));
    margin-right: var(--spacing-4);
  }
  
  .expense-form .form-group:nth-child(2) {
    margin-right: 0;
  }
  
  .quick-buttons {
    grid-template-columns: repeat(4, 1fr);
  }
  
  /* Expense List */
  .list-controls {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
  
  .search-bar {
    max-width: 400px;
  }
  
  /* Statistics */
  .charts-container {
    grid-template-columns: 1fr 1fr;
  }
  
  /* Settings */
  .data-actions {
    display: flex;
    gap: var(--spacing-4);
    flex-wrap: wrap;
  }
  
  .data-actions .btn {
    flex: 0 0 auto;
  }
  
  /* Modal */
  .modal {
    max-width: var(--max-width-lg);
  }
  
  .modal-footer {
    justify-content: space-between;
  }
}

/* ===================================================
   Large Desktop (1280px and up)
   =================================================== */

@media screen and (min-width: 1280px) {
  /* Header */
  .header-container {
    max-width: var(--max-width-6xl);
  }
  
  /* Statistics */
  .stats-cards {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .charts-container {
    grid-template-columns: 2fr 3fr;
  }
  
  /* Settings */
  .settings-container {
    max-width: var(--max-width-4xl);
  }
  
  .category-management {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-6);
    align-items: start;
  }
}

/* ===================================================
   Extra Large Desktop (1536px and up)
   =================================================== */

@media screen and (min-width: 1536px) {
  .header-container,
  .content-section,
  .footer-container {
    max-width: var(--max-width-6xl);
  }
  
  .expense-form {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-6);
    grid-template-areas:
      "amount category"
      "description date"
      "actions actions";
  }
  
  .expense-form .form-group:nth-child(1) { grid-area: amount; }
  .expense-form .form-group:nth-child(2) { grid-area: category; }
  .expense-form .form-group:nth-child(3) { grid-area: description; }
  .expense-form .form-group:nth-child(4) { grid-area: date; }
  .form-actions { grid-area: actions; }
}

/* ===================================================
   Component-specific Responsive Styles
   =================================================== */

/* Expense List Items */
.expense-item {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--spacing-4);
  margin-bottom: var(--spacing-3);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--spacing-3);
  align-items: center;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.expense-item:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
}

@media screen and (min-width: 768px) {
  .expense-item {
    grid-template-columns: auto 1fr auto auto auto;
    padding: var(--spacing-5);
  }
}

/* Statistics Cards */
.stat-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  padding: var(--spacing-5);
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.stat-title {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-2);
}

.stat-value {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-1);
}

.stat-change {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
}

@media screen and (min-width: 1024px) {
  .stat-card {
    padding: var(--spacing-6);
  }
  
  .stat-value {
    font-size: var(--font-size-3xl);
  }
}

/* Chart Sections */
.chart-section {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  padding: var(--spacing-5);
  box-shadow: var(--shadow-sm);
}

.chart-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-4);
  text-align: center;
}

.chart-wrapper {
  position: relative;
  height: 300px;
}

@media screen and (min-width: 768px) {
  .chart-section {
    padding: var(--spacing-6);
  }
  
  .chart-wrapper {
    height: 400px;
  }
}

/* Quick Action Buttons */
.quick-btn {
  padding: var(--spacing-3);
  border: 2px solid var(--color-primary);
  background: var(--color-white);
  color: var(--color-primary);
  border-radius: var(--radius-lg);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 44px;
}

.quick-btn:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.quick-btn:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ===================================================
   Touch and Interaction Improvements
   =================================================== */

@media (hover: none) and (pointer: coarse) {
  /* Touch device optimizations */
  .btn,
  .nav-tab,
  .quick-btn {
    min-height: 48px;
    padding: var(--spacing-4);
  }
  
  .form-input,
  .form-select {
    min-height: 48px;
  }
  
  .modal-close,
  .toast-close {
    min-width: 48px;
    min-height: 48px;
  }
  
  /* Remove hover states for touch devices */
  .nav-tab:hover,
  .btn-secondary:hover,
  .quick-btn:hover,
  .expense-item:hover {
    /* Reset to default state */
  }
}

/* ===================================================
   Print Styles
   =================================================== */

@media print {
  .header-nav,
  .form-actions,
  .quick-actions,
  .list-controls,
  .modal-overlay,
  .toast-container,
  .loading-indicator {
    display: none !important;
  }
  
  .header {
    position: static;
    box-shadow: none;
    border-bottom: 2px solid var(--color-gray-800);
  }
  
  .content-section {
    display: block !important;
  }
  
  .expense-item,
  .stat-card,
  .chart-section {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid var(--color-gray-400);
  }
  
  body {
    background: var(--color-white);
    color: var(--color-gray-900);
    font-size: 12pt;
    line-height: 1.4;
  }
}

/* ===================================================
   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;
    border-top-color: var(--color-primary);
  }
}