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

/* ============================================
   Tablet Breakpoint (768px - 1023px)
   ============================================ */

@media (min-width: 768px) and (max-width: 1023px) {
  .container {
    max-width: 90%;
  }

  section {
    padding: 1.5rem;
  }

  .header {
    padding: 1.5rem 0;
    margin-bottom: 1.5rem;
  }

  .card-selector {
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }

  .results-container {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
}

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

@media (min-width: 1024px) {
  section {
    padding: 2rem;
  }

  .card-selector {
    grid-template-columns: repeat(3, 1fr);
  }

  .results-container {
    grid-template-columns: 1fr 1fr;
  }

  .input-group {
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
  }

  .input-group.obsidian-category {
    grid-column: 1 / -1;
  }
}

/* ============================================
   Large Desktop (1440px and up)
   ============================================ */

@media (min-width: 1440px) {
  .container {
    max-width: 1200px;
  }
}

/* ============================================
   Mobile Small (320px - 479px)
   ============================================ */

@media (max-width: 479px) {
  body {
    font-size: 14px;
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
  }

  .container {
    padding: 0 1rem;
  }

  section {
    padding: 1rem;
    margin-bottom: 1rem;
  }

  .header {
    padding: 1rem 0;
    margin-bottom: 1rem;
  }

  .header-content {
    gap: 0.75rem;
  }

  .logo {
    width: 80px;
  }

  .header-text h1 {
    font-size: 1.35rem;
  }

  .subtitle {
    font-size: 0.8rem;
  }

  .card-selector {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .card-btn {
    padding: 1rem;
  }

  .card-name {
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
  }

  .card-fee {
    font-size: 0.8rem;
    margin-bottom: 0.5rem;
  }

  .card-rate {
    font-size: 0.85rem;
  }

  .input-group {
    margin-bottom: 1.75rem;
  }

  .currency-prefix,
  .value-input {
    font-size: 1.85rem;
  }

  .recommendation-banner {
    padding: 1rem;
    font-size: 0.9rem;
    margin-bottom: 1rem;
  }

  .results-container {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .result-panel {
    padding: 1rem;
  }

  .panel-header h3 {
    font-size: 1rem;
  }

  .tier-marker {
    font-size: 0.7rem;
  }

  .metric-row .label {
    font-size: 0.85rem;
  }

  .metric-row .value {
    font-size: 0.9rem;
  }

  .metric-row.annual.final-row .value {
    font-size: 1rem;
  }

  .footer {
    padding: 1.5rem 0;
    margin-top: 2rem;
  }

  .footer p {
    font-size: 0.8rem;
  }
}

/* ============================================
   Mobile Medium (480px - 767px)
   ============================================ */

@media (min-width: 480px) and (max-width: 767px) {
  .container {
    padding: 0 1.25rem;
  }

  section {
    padding: 1.25rem;
    margin-bottom: 1.25rem;
  }

  .header {
    padding: 1.25rem 0;
    margin-bottom: 1.25rem;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.25rem;
    margin-bottom: 1.25rem;
  }

  .logo {
    width: 100px;
  }

  .card-selector {
    grid-template-columns: 1fr;
  }

  .input-group {
    margin-bottom: 2rem;
  }

  .currency-prefix,
  .value-input {
    font-size: 1.85rem;
  }

  .results-container {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .result-panel {
    padding: 1.25rem;
  }

  .footer {
    padding: 1.5rem 0;
    margin-top: 2.5rem;
  }
}

/* ============================================
   Touch Devices
   ============================================ */

@media (hover: none) and (pointer: coarse) {
  button {
    padding: 0.75rem 1rem;
    min-height: 44px;
    min-width: 44px;
  }

  .slider::-webkit-slider-thumb {
    width: 36px;
    height: 36px;
  }

  .slider::-moz-range-thumb {
    width: 36px;
    height: 36px;
  }

  input[type='radio'] {
    width: 20px;
    height: 20px;
  }
}

/* ============================================
   High DPI Screens
   ============================================ */

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .logo {
    image-rendering: -webkit-optimize-contrast;
  }
}

/* ============================================
   Landscape Orientation (Mobile)
   ============================================ */

@media (orientation: landscape) and (max-height: 500px) {
  .header {
    margin-bottom: 1rem;
  }

  section {
    margin-bottom: 1rem;
  }

  .card-selector {
    gap: 0.5rem;
  }

  .input-group {
    margin-bottom: 1rem;
  }

  .currency-prefix,
  .value-input {
    font-size: 1.5rem;
  }
}

/* ============================================
   Very Wide Screens
   ============================================ */

@media (min-width: 1920px) {
  .container {
    max-width: 1400px;
  }

  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  section {
    padding: 2.5rem;
  }
}

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

@media print {
  body {
    background: white;
  }

  .header {
    margin-bottom: 1rem;
    page-break-after: avoid;
  }

  section {
    page-break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ddd;
    margin-bottom: 1.5rem;
  }

  .container {
    max-width: 100%;
  }

  input,
  button {
    display: none;
  }

  .recommendation-banner {
    display: none;
  }

  .results-container {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }

  .result-panel {
    page-break-inside: avoid;
  }
}