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

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #f3f4f6;
    color: #333;
}

.container {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 30px;
}

.form-card {
    width: 100%;
    max-width: 600px;
    background: #fff;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

h1 {
    margin-bottom: 10px;
    font-size: 30px;
    color: #222;
}

.subtitle {
    margin-bottom: 30px;
    color: #666;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 7px;
    font-weight: bold;
}

input,
textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #d1d5db;
    border-radius: 7px;
    font-size: 15px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}

input:focus,
textarea:focus {
    border-color: #2563eb;
}

textarea {
    resize: vertical;
}

button {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 7px;
    background: #2563eb;
    color: white;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.2s;
}

button:hover {
    background: #1d4ed8;
}

button:disabled {
    background: #9ca3af;
    cursor: not-allowed;
}

#mensagemRetorno {
    margin-top: 20px;
    text-align: center;
    font-weight: bold;
}

.sucesso {
    color: #15803d;
}

.erro {
    color: #dc2626;
}

@media (max-width: 600px) {
    .container {
        padding: 15px;
    }

    .form-card {
        padding: 25px 20px;
    }

    h1 {
        font-size: 26px;
    }
}