/* ====== TOGGLE BUTTON ====== */
.theme-toggle {
    text-align: right;
    margin-bottom: 1rem;
}

#theme-button {
    background: #39635e;
    color: white;
    border: none;
    border-radius: 6px;
    padding: 0.4rem 0.8rem;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background 0.3s;
}

#theme-button:hover {
    background: #2d4a46;
}

/* ====== DARK MODE ====== */
body.dark-mode {
    background: #1e1e1e;
    color: #ddd;
}

body.dark-mode .container {
    background: #2b2b2b;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.6);
}

body.dark-mode h2,
body.dark-mode label {
    color: #80cbc4;
}

body.dark-mode select,
body.dark-mode input {
    background: #3a3a3a;
    color: #fff;
    border: 1px solid #80cbc4;
}

body.dark-mode .result-box {
    background: #333;
    color: #80cbc4;
}

body.dark-mode button.convert-button {
    background: #388e3c;
}

body.dark-mode button.convert-button:hover {
    background: #2e7d32;
}

body.dark-mode .footer {
    color: #aaa;
}

/* ====== BASE ====== */
body {
    font-family: Arial, sans-serif;
    background: #f4f4f4;
    color: #333;
    display: flex;
    flex-direction: column; /* conteúdo + rodapé em coluna */
    min-height: 100vh;
    margin: 0;
    padding: 1rem;
}

.main-content {
    flex: 1; /* empurra o rodapé para baixo */
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}

.container {
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 700px;   /* Desktop largo */
    min-width: 300px;   /* mínimo */
    text-align: center;
    animation: fadeIn 0.5s ease-in-out;
}

h2 {
    margin-bottom: 1.5rem;
    color: #39635e;
}

/* ====== FORM ====== */
label {
    display: block;
    margin-top: 1rem;
    text-align: left;
    font-weight: bold;
    color: #39635e;
}

select,
input,
button {
    margin-top: 0.3rem;
    margin-bottom: 0.8rem;
    padding: 0.6rem;
    font-size: 1rem;
    width: 100%;
    border: 1px solid #39635e;
    border-radius: 6px;
    box-sizing: border-box;
    cursor: pointer;
    appearance: none;
}

button {
    background: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
    font-weight: bold;
    transition: transform 0.2s, background 0.3s;
}

button:hover {
    background: #45a049;
    transform: scale(1.05);
    opacity: 0.8;
}

button:active {
    opacity: 0.6;
}

/* ====== RESULTADO ====== */
.result-box {
    margin-top: 1.5rem;
    background: #f9f9f9;
    padding: 1rem;
    border-radius: 8px;
    color: #39635e;
    font-size: 18px;
}

/* Animação de slide + fade */
@keyframes slideFadeIn {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-box.animate {
    animation: slideFadeIn 0.5s ease-out;
}

.currency-display {
    margin-top: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.currency-img {
    width: 48px;
    height: 48px;
}

/* ====== RESPONSIVIDADE ====== */
.currency-selectors {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 1rem;
}

.currency-group {
    flex: 1;
    display: flex;
    flex-direction: column;
}

@media (max-width: 768px) {
    .container {
        padding: 1.5rem;
        max-width: 90%;
    }

    .currency-selectors {
        flex-direction: column;
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    body {
        padding: 0.5rem;
    }

    .container {
        padding: 1rem;
    }

    h2 {
        font-size: 1.3rem;
    }

    select,
    input,
    button {
        font-size: 0.9rem;
        padding: 0.5rem;
    }

    .currency-img {
        width: 40px;
        height: 40px;
    }

    .currency-selectors {
        gap: 0.3rem;
    }
}

/* ====== RODAPÉ ====== */
.footer {
    padding: 0.8rem 0;
    text-align: center;
    font-size: 0.9rem;
    color: #666;
    margin-top: 1rem;
}