:root {
      --primary: #1a365d;
      --primary-light: #2a4a7f;
      --secondary: #4a5568;
      --accent: #3182ce;
      --accent-light: #4299e1;
      --text-primary: #2d3748;
      --text-secondary: #4a5568;
      --text-light: #ffffff;
      --card-bg: rgba(255, 255, 255, 0.92);
      --container-bg: rgba(255, 255, 255, 0.85);
      --border-color: #e2e8f0;
      --success: #38a169;
      --error: #e53e3e;
      --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 5px 10px -5px rgba(0, 0, 0, 0.04);
    }
    
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html, body {
      min-height: 100%;
      font-family: 'Inter', sans-serif;
      color: var(--text-primary);
    }

  body {
    background-image: url('imagens/fundo.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
  }


    .header {
      text-align: center;
      margin-bottom: 30px;
      width: 100%;
      max-width: 800px;
    }

    h1 {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--text-light);
      text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
      letter-spacing: -0.5px;
    }
    
    
    .container {
      width: 100%;
      max-width: 1100px;
      background: rgba(255, 255, 255, 0.616);
      padding: 35px;
      border-radius: 20px;
      box-shadow: var(--shadow);
      backdrop-filter: blur(8px);
    }
    
    .conversion-panel {
      background: var(--card-bg);
      padding: 25px;
      border-radius: 20px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
      margin-bottom: 25px;
      border: 1px solid var(--border-color);
    }
    
    .row {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      align-items: flex-end;
    }
    
    .input-group {
      flex: 1;
      min-width: 180px;
    }
    
    label {
      display: block;
      margin-bottom: 8px;
      color: var(--text-secondary);
      font-size: 0.95rem;
      font-weight: 500;
    }
    
    select, input {
      width: 100%;
      padding: 14px 16px;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      background: white;
      color: var(--text-primary);
      font-size: 1rem;
      font-family: 'Inter', sans-serif;
      transition: all 0.2s ease;
    }
    
    
    input {
      font-weight: 500;
    }
    
    button {
      padding: 14px 20px;
      border: none;
      border-radius: 12px;
      cursor: pointer;
      font-weight: 600;
      font-size: 1rem;
      transition: all 0.2s ease;
      font-family: 'Inter', sans-serif;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    
    #swap {
      color: var(--accent);
      background-color: transparent;
    }
    
    #swap:hover {
      transform: translateY(-2px);
    }
    
    #refresh {
      background: var(--accent);
      color: white;
      flex: 1;
    }
    
    #refresh:hover {
      background: var(--accent-light);
      transform: translateY(-2px);
    }
    
    .info-panel {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 15px;
      margin-bottom: 15px;
    }
    
    .card {
      background: var(--card-bg);
      padding: 22px;
      border-radius: 20px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
      border: 1px solid var(--border-color);
    }
    
    .card-title {
      font-size: 0.9rem;
      color: var(--text-secondary);
      margin-bottom: 8px;
      font-weight: 500;
    }
    
    .card-value {
      font-size: 1.3rem;
      font-weight: 600;
      color: var(--primary);
    }
    
    #resultCard .card-value {
      color: var(--success);
      font-size: 1.5rem;
    }
    
    .controls-row {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
    }
    
    .checkbox-container {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.95rem;
      color: var(--text-secondary);
      flex: 1;
    }
    
    input[type="checkbox"] {
      width: 20px;
      height: 20px;
      margin-bottom: 10px;
      accent-color: var(--accent);
    }
    
    #interval {
      flex: 0.5;
      min-width: 150px;
    }
    
    .error {
      color: var(--error);
      font-size: 0.95rem;
      margin-top: 15px;
      padding: 12px 16px;
      background: rgba(229, 62, 62, 0.08);
      border-radius: 12px;
      border-left: 4px solid var(--error);
    }
    
    /* Estilos para os ícones de informação e tooltips */
    .info-icon {
      position: relative;
      display: inline-flex;
      margin-left: 8px;
      cursor: help;
    }
    
    .info-icon i {
      color: var(--accent);
      font-size: 16px;
    }
    
    .tooltip {
      position: absolute;
      bottom: 100%;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary);
      color: white;
      padding: 12px 15px;
      border-radius: 8px;
      font-size: 0.85rem;
      width: 280px;
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s ease;
      z-index: 100;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
      pointer-events: none;
      line-height: 1.5;
    }
    
    .tooltip::after {
      content: '';
      position: absolute;
      top: 100%;
      left: 50%;
      transform: translateX(-50%);
      border-width: 6px;
      border-style: solid;
      border-color: var(--primary) transparent transparent transparent;
    }
    
    .info-icon:hover .tooltip {
      opacity: 1;
      visibility: visible;
      bottom: calc(100% + 12px);
    }
    
    .interval-container {
      display: flex;
      align-items: center;
      gap: 8px;
      flex: 0.5;
    }
    
    /* Explicação da funcionalidade */
    .explanation-panel {
      background: var(--card-bg);
      border-left: 4px solid var(--accent);
      padding: 20px;
      border-radius: 12px;
      margin-top: 25px;
    }
    
    .explanation-title {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 12px;
      font-size: 1.1rem;
    }
    
    .explanation-title i {
      color: var(--accent);
      font-size: 1.3rem;
    }
    
    .explanation-content {
      color: var(--text-secondary);
      line-height: 1.6;
    }
    
    .scenario-list {
      margin-top: 15px;
      padding-left: 20px;
    }
    
    .scenario-list li {
      margin-bottom: 10px;
      line-height: 1.5;
    }
    
    .highlight {
      background: rgba(56, 161, 105, 0.1);
      padding: 3px 6px;
      border-radius: 4px;
      font-weight: 500;
      color: var(--success);
    }
    
    /* Responsividade */
    @media (max-width: 768px) {
      h1 {
        font-size: 2.2rem;
      }
      
      .container {
        padding: 15px 10px;
      }
      
      .row {
        gap: 10px;
      }

      select, input{
        font-size: 0.9rem;
      }
      
      .input-group {
        flex: 100%;
      }
      
      .info-panel {
        grid-template-columns: 1fr;
      }
      
      .tooltip {
        width: 250px;
        left: -100px;
        transform: none;
      }
      
      .tooltip::after {
        left: 120px;
      }

      .conversion-panel{
        margin-bottom: 15px;
        gap: 10px;
      }
  .controls-row,
  .explanation-panel {
    display: none !important;
  }
      
    }

    @media (max-width: 480px) {
      h1 {
        font-size: 1.7rem;
      }
      
      .card-value {
        font-size: 1rem;
      }
      
      #resultCard .card-value {
        font-size: 1.2rem;
      }
      
      .controls-row {
        flex-direction: column;
        align-items: stretch;
      }
      
      .interval-container {
        width: 100%;
      }
      
      .tooltip {
        width: 220px;
        left: -80px;
      }
      
      .tooltip::after {
        left: 100px;
      }
    }

    /* Animações sutis */
    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(10px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .container {
      animation: fadeIn 0.5s ease-out;
    }

    .card {
      transition: transform 0.2s ease;
    }

    .card:hover {
      transform: translateY(-3px);
    }