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

body {
    height: 100vh;
    background: linear-gradient(135deg, #1e293b, #0f172a);
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    width: 100%;
    display: flex;
    justify-content: center;
    padding: 20px;
}

.login-box {
    background: #ffffff;
    width: 100%;
    max-width: 420px; /* maior largura */
    padding: 40px; /* mais espaçamento interno */
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.25);
    text-align: center;
}

.login-box h2 {
    margin-bottom: 25px;
    color: #0f172a;
    font-weight: 600;
    font-size: 26px; /* maior no mobile */
}

.login-box label {
    display: block;
    text-align: left;
    margin-bottom: 6px;
    font-size: 15px;
    color: #334155;
}

.login-box input {
    width: 100%;
    padding: 14px; /* maior para tocar facilmente */
    margin-bottom: 18px;
    border-radius: 8px;
    border: 1px solid #cbd5f5;
    font-size: 15px;
    transition: 0.3s;
}

.login-box input:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 2px rgba(59,130,246,0.2);
}

.login-box button {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 8px;
    background: #3b82f6;
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s;
}

.login-box button:hover {
    background: #2563eb;
}

.login-box .link {
    display: block;
    margin-top: 18px;
    font-size: 14px;
    color: #3b82f6;
    text-decoration: none;
}

.login-box .link:hover {
    text-decoration: underline;
}

.erro {
    background: #fee2e2;
    color: #b91c1c;
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 15px;
    font-size: 14px;
}

/* ===== RESPONSIVO ===== */
@media (max-width: 768px) {
    .login-box {
        width: 90%; /* ocupa mais espaço no tablet */
        padding: 35px;
    }
}

@media (max-width: 480px) {
    .login-box {
        width: 95%; /* quase toda a tela do celular */
        padding: 30px;
    }

    .login-box h2 {
        font-size: 24px;
    }

    .login-box input,
    .login-box button {
        padding: 12px;
        font-size: 15px;
    }

    .login-box .link {
        font-size: 14px;
    }
}

@media (max-width: 360px) {
    .login-box {
        width: 97%;
        padding: 25px;
    }

    .login-box h2 {
        font-size: 22px;
    }

    .login-box input,
    .login-box button {
        padding: 10px;
        font-size: 14px;
    }

    .login-box .link {
        font-size: 13px;
    }
}