:root {
    --primary-color: #2e7d32;
    --primary-hover: #1b5e20;
    --bg-color: #f4f6f8;
    --text-color: #333;
    --white: #ffffff;
    --error-color: #d32f2f;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 15px; /* Margem de segurança para telas pequenas */
}

.login-container {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

/* Logo Responsiva */
.login-logo {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 50%;
    margin: 0 auto 15px auto;
    display: block;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    border: 3px solid var(--primary-color);
}

.login-container h2 {
    margin-bottom: 20px;
    color: var(--primary-color);
    font-size: 20px;
}

.form-group {
    margin-bottom: 15px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    font-size: 13px;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.3s;
    background: #fff;
}

.form-group input:focus {
    border-color: var(--primary-color);
}

.btn-submit {
    width: 100%;
    padding: 12px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s;
    margin-top: 10px;
}

.btn-submit:hover {
    background-color: var(--primary-hover);
}

.alert-error {
    background-color: #ffebee;
    color: var(--error-color);
    padding: 10px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-size: 13px;
    text-align: center;
}

/* Ajustes finos para celulares muito estreitos */
@media (max-width: 400px) {
    .login-container {
        padding: 20px 15px;
    }
    .login-logo {
        width: 85px;
        height: 85px;
    }
}