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

/* ==========================================
   TABLET BREAKPOINT (768px+)
   ========================================== */

@media (min-width: 768px) {
  :root {
    --grid-cols: 4;
    --grid-gap: var(--spacing-5);
  }
  
  .container {
    padding: 0 var(--spacing-6);
  }
  
  /* Header */
  .header__content {
    padding: var(--spacing-5) 0;
  }
  
  .header__title {
    font-size: var(--font-size-2xl);
  }
  
  .header__brand i {
    font-size: var(--font-size-3xl);
  }
  
  /* Navigation */
  .nav__link {
    padding: var(--spacing-4) var(--spacing-6);
    font-size: var(--font-size-base);
  }
  
  /* Search Section */
  .search-section {
    padding: var(--spacing-16) 0;
  }
  
  .search-input {
    font-size: var(--font-size-xl);
  }
  
  .search-box {
    padding: var(--spacing-5) var(--spacing-6);
  }
  
  /* Results Section */
  .results-title {
    font-size: var(--font-size-3xl);
  }
  
  .results-info {
    margin-bottom: var(--spacing-10);
  }
  
  .icon-card {
    padding: var(--spacing-8);
  }
  
  .icon-card__icon {
    font-size: 2.5rem; /* 40px */
  }
  
  .icon-card__name {
    font-size: var(--font-size-base);
  }
  
  /* Filters */
  .filters {
    gap: var(--spacing-8);
  }
  
  .filter-select {
    min-width: 180px;
  }
}

/* ==========================================
   DESKTOP BREAKPOINT (1024px+)
   ========================================== */

@media (min-width: 1024px) {
  :root {
    --grid-cols: 6;
    --grid-gap: var(--spacing-6);
  }
  
  .container {
    max-width: 1200px;
    padding: 0 var(--spacing-8);
  }
  
  /* Header */
  .header__content {
    padding: var(--spacing-6) 0;
  }
  
  .header__title {
    font-size: var(--font-size-3xl);
  }
  
  /* Navigation */
  .nav__list {
    gap: var(--spacing-3);
  }
  
  .nav__link {
    padding: var(--spacing-5) var(--spacing-8);
    font-size: var(--font-size-base);
  }
  
  /* Search Section */
  .search-section {
    padding: var(--spacing-20) 0;
  }
  
  .search-container {
    max-width: 700px;
  }
  
  .search-box {
    padding: var(--spacing-6) var(--spacing-8);
  }
  
  .search-input {
    padding: 0 var(--spacing-4);
  }
  
  /* Results Section */
  .results-section {
    padding: var(--spacing-12) 0 var(--spacing-20);
  }
  
  .results-info {
    margin-bottom: var(--spacing-12);
  }
  
  .icon-card {
    padding: var(--spacing-10);
  }
  
  .icon-card__icon {
    font-size: 3rem; /* 48px */
  }
  
  /* Filters */
  .filters {
    gap: var(--spacing-10);
  }
  
  .filter-select {
    min-width: 200px;
    font-size: var(--font-size-base);
  }
}

/* ==========================================
   LARGE DESKTOP BREAKPOINT (1280px+)
   ========================================== */

@media (min-width: 1280px) {
  :root {
    --grid-cols: 8;
  }
  
  .container {
    max-width: 1400px;
  }
  
  /* Header */
  .header__content {
    padding: var(--spacing-8) 0;
  }
  
  .header__title {
    font-size: var(--font-size-4xl);
  }
  
  .theme-toggle {
    width: 56px;
    height: 56px;
  }
  
  /* Search Section */
  .search-section {
    padding: var(--spacing-24) 0;
  }
  
  .search-container {
    max-width: 800px;
  }
  
  .search-input {
    font-size: var(--font-size-2xl);
  }
  
  /* Results Section */
  .results-title {
    font-size: var(--font-size-4xl);
  }
  
  .icon-card {
    padding: var(--spacing-12);
  }
  
  .icon-card__icon {
    font-size: 3.5rem; /* 56px */
  }
  
  .icon-card__name {
    font-size: var(--font-size-lg);
  }
}

/* ==========================================
   ULTRA-WIDE BREAKPOINT (1536px+)
   ========================================== */

@media (min-width: 1536px) {
  :root {
    --grid-cols: 10;
  }
  
  .container {
    max-width: 1600px;
  }
  
  /* Icon Detail Modal */
  .icon-detail {
    padding: var(--spacing-12);
  }
  
  .icon-preview {
    padding: var(--spacing-16);
  }
  
  .icon-preview i {
    font-size: 6rem; /* 96px */
  }
}

/* ==========================================
   MOBILE-SPECIFIC ADJUSTMENTS
   ========================================== */

@media (max-width: 767px) {
  /* Header */
  .header__content {
    padding: var(--spacing-3) 0;
  }
  
  .header__title {
    font-size: var(--font-size-lg);
  }
  
  .header__brand i {
    font-size: var(--font-size-xl);
  }
  
  .theme-toggle {
    width: 40px;
    height: 40px;
  }
  
  /* Navigation */
  .nav__list {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: var(--spacing-2);
  }
  
  .nav__link {
    flex-shrink: 0;
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-sm);
  }
  
  .nav__link span:not(.nav__badge) {
    display: none;
  }
  
  /* Search Section */
  .search-section {
    padding: var(--spacing-8) 0;
  }
  
  .search-container {
    margin-bottom: var(--spacing-6);
  }
  
  .search-box {
    padding: var(--spacing-3) var(--spacing-4);
  }
  
  .search-input {
    font-size: var(--font-size-base);
    padding: 0 var(--spacing-2);
  }
  
  /* Filters */
  .filters {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-4);
    margin-top: var(--spacing-6);
  }
  
  .filter-group {
    width: 100%;
  }
  
  .filter-select {
    width: 100%;
  }
  
  /* Results Section */
  .results-section {
    padding: var(--spacing-6) 0 var(--spacing-12);
  }
  
  .results-info {
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: var(--spacing-6);
  }
  
  .results-title {
    font-size: var(--font-size-xl);
  }
  
  .icon-card {
    padding: var(--spacing-4);
  }
  
  .icon-card__icon {
    font-size: var(--font-size-2xl);
  }
  
  .icon-card__name {
    font-size: var(--font-size-xs);
  }
  
  /* Modal */
  .modal__content {
    margin: var(--spacing-4);
    max-height: calc(100vh - var(--spacing-8));
  }
  
  .icon-detail {
    padding: var(--spacing-6);
  }
  
  .icon-preview {
    padding: var(--spacing-8);
  }
  
  .icon-preview i {
    font-size: var(--font-size-4xl);
  }
  
  /* Footer */
  .footer__content {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
    text-align: center;
  }
  
  .footer__section ul {
    display: inline-block;
    text-align: left;
  }
}

/* ==========================================
   SMALL MOBILE BREAKPOINT (320px+)
   ========================================== */

@media (max-width: 374px) {
  :root {
    --grid-cols: 1;
  }
  
  .container {
    padding: 0 var(--spacing-3);
  }
  
  /* Header */
  .header__title {
    font-size: var(--font-size-base);
  }
  
  /* Search */
  .search-box {
    padding: var(--spacing-2) var(--spacing-3);
  }
  
  .search-input {
    font-size: var(--font-size-sm);
  }
  
  /* Icon Card */
  .icon-card {
    padding: var(--spacing-3);
  }
  
  .icon-card__icon {
    font-size: var(--font-size-xl);
  }
  
  .icon-card__name {
    font-size: var(--font-size-xs);
  }
}

/* ==========================================
   HIGH DPI / RETINA DISPLAYS
   ========================================== */

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  /* Ensure smooth fonts on high DPI displays */
  body {
    -webkit-font-smoothing: subpixel-antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
  
  /* Optimize icon rendering */
  .icon-card__icon,
  .icon-preview i {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
}

/* ==========================================
   PRINT STYLES
   ========================================== */

@media print {
  /* Hide interactive elements */
  .theme-toggle,
  .search-section,
  .filters,
  .load-more-btn,
  .modal,
  .toast-container {
    display: none !important;
  }
  
  /* Optimize for print */
  body {
    background: white;
    color: black;
    font-size: 12pt;
    line-height: 1.5;
  }
  
  .container {
    max-width: 100%;
    padding: 0;
  }
  
  .header,
  .nav,
  .footer {
    background: white !important;
    color: black !important;
    border: 1px solid #ddd !important;
  }
  
  .icon-card {
    background: white !important;
    border: 1px solid #ddd !important;
    break-inside: avoid;
  }
  
  .icons-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
  }
  
  a {
    color: black !important;
    text-decoration: underline !important;
  }
}

/* ==========================================
   REDUCED MOTION PREFERENCES
   ========================================== */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
  
  .theme-toggle i,
  .search-clear,
  .modal__close,
  .copy-btn,
  .action-btn,
  .load-more-btn {
    transition: none !important;
  }
  
  .icon-card:hover,
  .search-box:focus-within,
  .theme-toggle:hover {
    transform: none !important;
  }
}

/* ==========================================
   TOUCH DEVICE OPTIMIZATIONS
   ========================================== */

@media (hover: none) and (pointer: coarse) {
  /* Increase touch targets */
  .theme-toggle,
  .search-clear,
  .modal__close,
  .copy-btn,
  .action-btn,
  .load-more-btn,
  .icon-card,
  .nav__link {
    min-height: 44px;
    min-width: 44px;
  }
  
  .icon-card {
    padding: var(--spacing-6);
  }
  
  .search-box {
    padding: var(--spacing-4) var(--spacing-5);
  }
  
  /* Remove hover effects on touch devices */
  .icon-card:hover {
    transform: none;
    box-shadow: var(--shadow-md);
  }
  
  .theme-toggle:hover {
    transform: none;
  }
}

/* ==========================================
   DARK MODE MEDIA QUERY (SYSTEM PREFERENCE)
   ========================================== */

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    /* Apply dark theme variables when system preference is dark */
    --color-bg: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-bg-tertiary: #334155;
    --color-surface: #1e293b;
    --color-surface-elevated: #334155;
    
    --color-text: #f8fafc;
    --color-text-secondary: #cbd5e1;
    --color-text-tertiary: #94a3b8;
    --color-text-inverse: #0f172a;
    
    --color-border: #334155;
    --color-border-light: #475569;
    --color-border-dark: #1e293b;
    
    /* Shadows - Dark Theme */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.4), 0 8px 10px -6px rgb(0 0 0 / 0.4);
  }
}