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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f7f6;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: #ffffff;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.main-header {
    text-align: center;
    border-bottom: 2px solid #eaeaea;
    padding-bottom: 20px;
    margin-bottom: 30px;
}

.main-header h1 {
    color: #1a365d;
    font-size: 2.2rem;
    margin-bottom: 10px;
}

.subtitle {
    color: #718096;
    font-size: 1.1rem;
}

.content h2 {
    color: #2b6cb0;
    margin-bottom: 15px;
}

.intro-section {
    margin-bottom: 30px;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background: #edf2f7;
    padding: 20px;
    border-radius: 8px;
    border-left: 5px solid #3182ce;
}

.card h3 {
    color: #2d3748;
    margin-bottom: 10px;
}

.btn-primary {
    display: block;
    width: fit-content;
    background-color: #3182ce;
    color: white;
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s ease;
    margin: 20px auto;
}

.btn-primary:hover {
    background-color: #2b6cb0;
}

.hidden-msg {
    text-align: center;
    color: #2f855a;
    font-weight: bold;
    margin-top: 15px;
    display: none; /* Controlado pelo JS */
}

footer {
    margin-top: 40px;
    text-align: center;
    font-size: 0.9rem;
    color: #a0aec0;
    border-top: 1px solid #eaeaea;
    padding-top: 20px;
}