/* Reset básico */
body, h1, h2, h3, p, ul, li, form {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Segoe UI", Roboto, sans-serif;
    background: linear-gradient(135deg, #3498db, #2c3e50);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Container do login */
.login-wrapper {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: #fff;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 6px 18px rgba(0,0,0,0.15);
    text-align: center;
}

.login-box h1 {
    font-size: 1.5rem;
    color: #2c3e50;
    margin-bottom: 1.5rem;
}

/* Formulário */
.formulario-login {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.campo {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.campo label {
    font-size: 0.9rem;
    color: #2c3e50;
    margin-bottom: 0.4rem;
}

.campo input {
    padding: 0.7rem 1rem;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 0.95rem;
    transition: border 0.2s ease;
}

.campo input:focus {
    border-color: #3498db;
    outline: none;
}

/* Botão */
.btn-entrar {
    padding: 0.9rem;
    background: #3498db;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s ease;
}

.btn-entrar:hover {
    background: #2980b9;
}

/* Mensagem de erro */
.alerta.erro {
    background: #fce4e4;
    color: #c0392b;
    padding: 0.8rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}