/**
 * Responsive Styles
 * レスポンシブ対応のスタイル
 */

/* Breakpoints */
/* xs: 0px and up */
/* sm: 576px and up */
/* md: 768px and up */
/* lg: 992px and up */
/* xl: 1200px and up */
/* xxl: 1400px and up */

/* Large screens and down */
@media (max-width: 1199.98px) {
  .container {
    max-width: 960px;
  }
  
  .sidebar {
    flex: 0 0 280px;
  }
}

/* Medium screens and down */
@media (max-width: 991.98px) {
  .container {
    max-width: 720px;
  }
  
  /* Navigation */
  .main-navigation {
    position: relative;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-md);
    margin-top: var(--spacing-sm);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: var(--z-dropdown);
  }
  
  .nav-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  
  .nav-menu li {
    width: 100%;
  }
  
  .nav-menu a {
    justify-content: flex-start;
    width: 100%;
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
  }
  
  .nav-menu .sub-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: var(--color-bg-secondary);
    margin-top: var(--spacing-sm);
    border-radius: var(--border-radius-md);
  }
  
  /* Content Layout */
  .content-area {
    flex-direction: column;
    gap: var(--spacing-xl);
  }
  
  .sidebar {
    flex: none;
    position: static;
    order: 2;
  }
  
  /* Cards */
  .card-deck {
    flex-direction: column;
  }
  
  /* Footer */
  .footer-widgets {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-md);
  }
}

/* Small screens and down */
@media (max-width: 767.98px) {
  :root {
    --container-padding: 0.75rem;
  }
  
  .container {
    max-width: 540px;
  }
  
  /* Typography */
  h1 { font-size: var(--font-size-3xl); }
  h2 { font-size: var(--font-size-2xl); }
  h3 { font-size: var(--font-size-xl); }
  
  .article-title {
    font-size: var(--font-size-2xl);
  }
  
  /* Header */
  .header-container {
    padding: var(--spacing-sm) 0;
  }
  
  .site-title {
    font-size: var(--font-size-lg);
  }
  
  /* Grid */
.row {
    margin: 0 calc(var(--spacing-sm) * -0.5);
  }
  
  .col {
    padding: 0 calc(var(--spacing-sm) * 0.5);
  }
  
  /* Mobile Grid */
  .col-sm-1 { flex: 0 0 8.333333%; max-width: 8.333333%; }
  .col-sm-2 { flex: 0 0 16.666667%; max-width: 16.666667%; }
  .col-sm-3 { flex: 0 0 25%; max-width: 25%; }
  .col-sm-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
  .col-sm-5 { flex: 0 0 41.666667%; max-width: 41.666667%; }
  .col-sm-6 { flex: 0 0 50%; max-width: 50%; }
  .col-sm-7 { flex: 0 0 58.333333%; max-width: 58.333333%; }
  .col-sm-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
  .col-sm-9 { flex: 0 0 75%; max-width: 75%; }
  .col-sm-10 { flex: 0 0 83.333333%; max-width: 83.333333%; }
  .col-sm-11 { flex: 0 0 91.666667%; max-width: 91.666667%; }
  .col-sm-12 { flex: 0 0 100%; max-width: 100%; }
  
  /* Buttons */
  .btn {
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
  }
  
  /* Forms */
  .form-control,
  .form-input,
  .form-select,
  .form-textarea {
    font-size: 16px; /* Prevent zoom on iOS */
  }
  
  /* Cards */
  .card {
    margin-bottom: var(--spacing-lg);
  }
  
  .card-header,
  .card-body,
  .card-footer {
    padding: var(--spacing-md);
  }
  
  /* Tables */
  .table-responsive {
    font-size: var(--font-size-sm);
  }
  
  .data-table th,
  .data-table td {
    padding: var(--spacing-sm);
  }
  
  /* Modals */
  .modal-dialog {
    margin: var(--spacing-md);
    max-width: calc(100% - 2rem);
  }
  
  .modal-header,
  .modal-body,
  .modal-footer {
    padding: var(--spacing-md);
  }
  
  /* Pagination */
  .pagination-link,
  .pagination-current {
    min-width: 36px;
    height: 36px;
    font-size: var(--font-size-xs);
  }
  
  .pagination-list {
    gap: 2px;
  }
  
  /* Footer */
  .footer-widgets {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .footer-menu {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  /* Spacing Utilities for Mobile */
  .mb-sm-1 { margin-bottom: var(--spacing-xs); }
  .mb-sm-2 { margin-bottom: var(--spacing-sm); }
  .mb-sm-3 { margin-bottom: var(--spacing-md); }
  .mb-sm-4 { margin-bottom: var(--spacing-lg); }
  .mb-sm-5 { margin-bottom: var(--spacing-xl); }
  
  .mt-sm-1 { margin-top: var(--spacing-xs); }
  .mt-sm-2 { margin-top: var(--spacing-sm); }
  .mt-sm-3 { margin-top: var(--spacing-md); }
  .mt-sm-4 { margin-top: var(--spacing-lg); }
  .mt-sm-5 { margin-top: var(--spacing-xl); }
  
  .p-sm-1 { padding: var(--spacing-xs); }
  .p-sm-2 { padding: var(--spacing-sm); }
  .p-sm-3 { padding: var(--spacing-md); }
  .p-sm-4 { padding: var(--spacing-lg); }
  .p-sm-5 { padding: var(--spacing-xl); }
  
  /* Display Utilities for Mobile */
  .d-sm-none { display: none; }
  .d-sm-block { display: block; }
  .d-sm-flex { display: flex; }
  
  /* Text Alignment for Mobile */
  .text-sm-center { text-align: center; }
  .text-sm-left { text-align: left; }
  .text-sm-right { text-align: right; }
}

/* Extra small screens */
@media (max-width: 575.98px) {
  .container {
    max-width: 100%;
    padding: 0 var(--spacing-md);
  }
  
  /* Site Layout */
  .site-main {
    padding: var(--spacing-lg) 0;
  }
  
  /* Typography */
  h1 { font-size: var(--font-size-2xl); }
  h2 { font-size: var(--font-size-xl); }
  h3 { font-size: var(--font-size-lg); }
  
  /* Header */
  .header-container {
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: flex-start;
  }
  
  .site-branding {
    width: 100%;
    justify-content: space-between;
  }
  
  .main-navigation {
    width: 100%;
  }
  
  /* Article */
  .article-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }
  
  /* Buttons */
  .btn-block-sm {
    display: flex;
    width: 100%;
  }
  
  /* Forms */
  .form-group {
    margin-bottom: var(--spacing-md);
  }
  
  /* Cards */
  .card-header,
  .card-body,
  .card-footer {
    padding: var(--spacing-sm);
  }
  
  /* Alerts */
  .alert {
    padding: var(--spacing-sm) var(--spacing-md);
    flex-direction: column;
    text-align: center;
  }
  
  .alert-close {
    position: static;
    align-self: flex-end;
    margin-top: var(--spacing-sm);
  }
  
  /* Empty State */
  .empty-state {
    padding: var(--spacing-xl) var(--spacing-sm);
  }
  
  .empty-state-icon {
    font-size: 3rem;
  }
}

/* Large screens and up */
@media (min-width: 1200px) {
  .container {
    max-width: var(--container-max-width);
  }
  
  /* Grid for Large Screens */
  .col-lg-1 { flex: 0 0 8.333333%; max-width: 8.333333%; }
  .col-lg-2 { flex: 0 0 16.666667%; max-width: 16.666667%; }
  .col-lg-3 { flex: 0 0 25%; max-width: 25%; }
  .col-lg-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
  .col-lg-5 { flex: 0 0 41.666667%; max-width: 41.666667%; }
  .col-lg-6 { flex: 0 0 50%; max-width: 50%; }
  .col-lg-7 { flex: 0 0 58.333333%; max-width: 58.333333%; }
  .col-lg-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
  .col-lg-9 { flex: 0 0 75%; max-width: 75%; }
  .col-lg-10 { flex: 0 0 83.333333%; max-width: 83.333333%; }
  .col-lg-11 { flex: 0 0 91.666667%; max-width: 91.666667%; }
  .col-lg-12 { flex: 0 0 100%; max-width: 100%; }
}

/* Extra large screens */
@media (min-width: 1400px) {
  .container {
    max-width: 1320px;
  }
}

/* High DPI / Retina Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  /* Optimize for high DPI displays */
  .card,
  .btn,
  .form-control,
  .alert {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
}

/* 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;
  }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  /* Dark mode styles can be added here if needed */
  /* Currently keeping light theme as per requirements */
}

/* Print Styles */
@media print {
  .site-header,
  .site-footer,
  .sidebar,
  .mobile-menu-toggle,
  .btn,
  .alert,
  .modal {
    display: none !important;
  }
  
  .site-main {
    padding: 0;
  }
  
  .container {
    max-width: 100%;
    padding: 0;
  }
  
  .content-area {
    display: block;
  }
  
  .main-content {
    width: 100%;
  }
  
  .article-title {
    font-size: 24pt;
    margin-bottom: 12pt;
  }
  
  .article-content {
    font-size: 12pt;
    line-height: 1.4;
  }
  
  .card {
    border: 1px solid #000;
    box-shadow: none;
    break-inside: avoid;
  }
  
  .data-table {
    font-size: 10pt;
  }
  
  .data-table th,
  .data-table td {
    padding: 4pt;
    border: 1px solid #000;
  }
}