.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 24px;
  }
  .tool-header {
    text-align: center;
    padding: clamp(24px, 6vw, 48px) 0 clamp(16px, 4vw, 32px);
  }
  .tool-header h1 {
    font-size: clamp(28px, 6vw, 42px);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-color);
    margin-bottom: 16px;
  }
  .badge {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    font-size: 0.65em;
    padding: 4px 12px;
    border-radius: 40px;
    color: white;
    vertical-align: middle;
    margin-left: 8px;
  }
  .lead {
    font-size: clamp(0.9rem, 3vw, 1.1rem);
    color: var(--gray);
    max-width: 700px;
    margin: 0 auto;
  }

  .converter-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
    max-width: 700px;
    margin: 0 auto 32px;
  }
  .card-body {
    padding: clamp(20px, 5vw, 32px);
  }

  .currency-input-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 20px;
  }
  .currency-input-group > * {
    flex: 1;
    min-width: 120px;
  }
  .amount-input {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    background: var(--input-bg);
    color: var(--text-color);
    font-size: 1.1rem;
    font-weight: 500;
    transition: var(--transition);
  }
  .amount-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
  }
  .select-modern {
    width: 100%;
    padding: 14px 16px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    background: var(--input-bg);
    color: var(--text-color);
    font-size: 1rem;
    cursor: pointer;
  }
  .swap-btn {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 40px;
    padding: 8px 20px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
  }
  .swap-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
  }
  .result-box {
    background: var(--bg-light);
    border-radius: 20px;
    padding: 24px;
    text-align: center;
    margin-top: 24px;
  }
  .result-amount {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin: 8px 0;
    word-break: break-word;
  }
  .rate-info {
    font-size: 0.85rem;
    color: var(--gray);
    margin-top: 12px;
  }
  .last-update {
    font-size: 0.75rem;
    color: var(--gray);
    margin-top: 16px;
  }
  .action-bar {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-top: 24px;
    flex-wrap: wrap;
  }
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 40px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
  }
  .btn-primary {
    background: var(--primary);
    color: white;
  }
  .btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
  }
  .btn-secondary {
    background: var(--secondary);
    color: white;
  }
  .btn-secondary:hover {
    background: var(--primary-dark);
  }
  .info-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 24px;
    margin-top: 32px;
    border: 1px solid var(--border-color);
  }
  .info-card h3 {
    font-size: 1.2rem;
    margin-bottom: 16px;
  }
  .info-card ul {
    list-style: none;
    padding-left: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 12px;
  }
  .info-card li {
    padding-left: 24px;
    position: relative;
    margin-bottom: 12px;
    color: var(--gray);
  }
  .info-card li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
  }
  .loading-spinner-small {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-left: 8px;
  }
  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }
  @media (max-width: 640px) {
    .currency-input-group {
      flex-direction: column;
    }
    .result-amount {
      font-size: 1.5rem;
    }
    .btn {
      width: 100%;
    }
  }