/* Variáveis de Cores Baseadas no Layout Escuro */
:root {
    --bg-color: #0b0914; /* Fundo principal escuro */
    --card-bg: #1a1625; /* Fundo do formulário */
    --card-result-bg: #231b42; /* Fundo do resultado */
    --primary-color: #4f46e5; /* Roxo/Azul do botão */
    --primary-hover: #4338ca;
    --text-main: #ffffff;
    --text-muted: #9ca3af;
    --border-color: #2d263b;
}

/* Reset básico */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 400px; /* Mantém o design compacto como na imagem */
}

/* Logo */
.logo {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    font-weight: bold;
    letter-spacing: 2px;
    color: var(--primary-color);
    margin-bottom: 30px;
}

/* Cartão Principal */
.card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden; /* Para manter o border-radius com as seções internas */
}

.form-section {
    background-color: var(--card-bg);
    padding: 24px;
}

/* Grupos de Input */
.input-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 20px;
}

.input-group label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}

.input-group input, .input-group select {
    background-color: #120e1a;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 12px;
    border-radius: 6px;
    font-size: 1rem;
    outline: none;
    transition: border 0.3s ease;
}

.input-group input:focus, .input-group select:focus {
    border-color: var(--primary-color);
}

/* Botão */
.btn-primary {
    width: 100%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 14px;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s ease;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

/* Seção de Resultado */
.result-section {
    background-color: var(--card-result-bg);
    padding: 24px;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.result-section.hidden {
    display: none; /* Classe utilitária para esconder a div */
}

#exchange-rate {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 10px;
}

#final-result {
    font-size: 1.8rem;
    font-weight: bold;
}