/* Estilos globais */
:root {
    --primary-color: #004d9c;
    --secondary-color: #e6f2ff;
    --background-color: #f0f4f7;
    --card-background: #ffffff;
    --text-color: #333;
    --error-color: #e74c3c;
    --info-color: #007bff;
    --border-radius: 8px;
    --box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Montserrat', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: var(--primary-color);
    color: #fff;
    text-align: center;
    padding: 2.5rem 1rem;
    box-shadow: var(--box-shadow);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

header p {
    font-size: 1.1rem;
    opacity: 0.8;
}

main {
    flex: 1;
    padding: 2rem 1rem;
    max-width: 900px;
    margin: 0 auto;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.tabs {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
}

.tab-btn {
    padding: 0.75rem 1.2rem;
    background-color: var(--secondary-color);
    color: var(--primary-color);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 700;
    transition: background-color 0.3s;
    font-size: 0.9rem;
}

.tab-btn.active {
    background-color: var(--primary-color);
    color: #fff;
}

.tab-btn:hover:not(.active) {
    background-color: #d1e1f1;
}

.date-picker {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

#date-input, #search-btn {
    padding: 0.75rem;
    border: 1px solid var(--primary-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
}

#search-btn {
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    cursor: pointer;
    font-weight: 700;
}

#content-container {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.data-card {
    flex: 1 1 350px;
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
    text-align: center;
}

.data-card h2 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.data-card .value {
    font-size: 2rem;
    font-weight: 700;
    color: #28a745;
}

.data-card .date {
    font-size: 0.9rem;
    opacity: 0.6;
    margin-top: 0.5rem;
}

#converter-card {
    display: none;
}

#converter-card input {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 1rem;
    border: 1px solid var(--primary-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    text-align: center;
}

#graph-container {
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    padding: 1rem;
    box-shadow: var(--box-shadow);
}

#graph-title {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-weight: 700;
    font-size: 1rem;
}

.info-message, .error-message {
    text-align: center;
    font-size: 1.1rem;
}

.info-message {
    color: var(--info-color);
}

.error-message {
    color: var(--error-color);
}

footer {
    text-align: center;
    padding: 1rem;
    background-color: var(--primary-color);
    color: #fff;
    opacity: 0.9;
    margin-top: auto;
}

/* Media Query para telas maiores */
@media (min-width: 768px) {
    .tabs, .date-picker {
        justify-content: flex-start;
    }

    .tab-btn {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }

    .data-card h2 {
        font-size: 1.8rem;
    }

    .data-card .value {
        font-size: 2.5rem;
    }

    .data-card .date {
        font-size: 1rem;
    }

    #graph-title {
        font-size: 1.2rem;
    }
}